- Bechor (first-born male) of a Jewish-owned goat, sheep, or cow
- Chametz on Passover
- Idols
- Kilei ha'kerem
- Mixtures of milk cooked with meat
- Orla
- Yayin nesech and possibly stam yeinam.
A microwave oven that does not normally get hot, may get hotter than 120° F if you cook:
-
A liquid or moist food for a long time (even if less than 10 minutes),
-
Several liquid or moist items sequentially, or
-
Popcorn and similar foods.
- Leave your house 30 days or more before Passover, and
- Will not return to your house until after Passover has ended, and
- Have sold your chametz before the holiday begins.
Microwave oven floors can get hot, especially where there is no rotating glass tray and the utensil is placed directly on the oven floor. All microwave ovens should be assumed to get hot unless you have tested them personally.
Microwave Floor
Cover the floor (ideally with styrofoam or another substance that blocks heat and moisture).
Glass Tray
The glass tray does not become non-kosher and does not become dairy or meat or chametz (unless it was removed and used in a conventional oven) as long as it is clean.
Plastic Tray Support
The plastic support under the glass tray must be cleaned and must be blocked from contact with actual cooking utensils and from food if the tray:
- Has any food of the gender opposite that of the food being cooked,
- Has non-kosher food on it, or
- Is dirty and you cannot tell with what.
Passover celebrates the seven or eight days starting with the 14th of Nisan, when God took the Israelites out of Egypt about 3300 years ago. The holiday has several names:
- Chag HaPesach--Holiday of "Skipping Over" (reflecting that God passed over the Jewish homes and did not kill the first-born sons, unlike those of the Egyptians);
- Chag HaAviv--Festival of Spring (the Jewish calendar is based on the moon and is adjusted to the solar cycle so that Passover always comes in the spring);
- Chag HaMatzot--Holiday of Unleavened Bread; and
- Zman Cheiruteinu--Time of our Freedom.
Introduction to Passover: Passover Observance
Chametz
Chametz Gamur and Ta'arovet Chametz
The Five Grains, once fermented into items such as bread or beer, are genuine chametz (chametz gamur) and are forbidden on Passover by the Torah (d'oraita). Ta'arovet chametz (a mixture containing chametz) includes foods such as breakfast cereal and are also forbidden on Passover.Rules for Chametz
- You may not own or see (your own) chametz during the entire period of Passover.
- You may not benefit in any way from chametz during Passover, whether it belongs to a Jew or to a non-Jew. If the chametz was owned by a Jew during Passover, you may not benefit from that chametz even after the holiday has ended.
What To Do with Chametz
Ideally, any chametz should be used up before Passover, given to a non-Jew, or destroyed. But if the chametz has significant value, the custom is to sell that chametz to a non-Jew. You do not need to sell kitniyot, but you must sell any genuine chametz and any mixtures of chametz (ta'arovet chametz).Passover and Nullification by 1/60th
During the year, 1/60th or less of an undesired substance is considered to be inconsequential and nullified by the other substances. But on Passover, any amount of leaven mixed in food is forbidden.However, the chametz in food acquired before Passover can be nullified before Passover, but ONLY if:
- It is 1/60th or less of the total volume of food,
- The food is liquid mixed in other liquid, or solid in other solid, AND
- The chametz/non-chametz elements cannot be easily separated from each other.
Four Steps To Eliminating Chametz
There are four means of eliminating chametz:-
Bedika: Searching
You try to find any chametz. -
Bitul: Verbal and Intentional Nullification
Since you may have overlooked some chametz during bedika, declare that any chametz in your possession is not important to you and has no value. -
Bi'ur: Burning
By burning and therefore destroying the chametz, we fulfill the Torah
commandment of “tashbitu” (making it cease to exist). -
Mechira: Selling
By changing the ownership, we no longer own chametz on Passover and we create the opportunity to re-acquire the chametz after Passover has ended if the non-Jewish buyer agrees.
Chametz Symbolism
Fermented grains represent (among other things) arrogance and pride: the puffing up of fermented grains is symbolic of people puffing up themselves. In Judaism, one way to get rid of a bad personal trait is to utterly destroy it and so we symbolically remove and destroy any fermented grain foods from our houses and ownership.Destroying chametz is not a violation of “do not destroy” (bal tashchit) since it is done to perform a commandment.
What Are Kitniyot
Kitniyot are foods that look similar to the five chametz grains or that could be ground into a flour that could look like flour from those grains, such as beans, peanuts, rice, corn, mustard seeds, and other food plants that are grown near the Five Grains.What To Do with Kitniyot
Kitniyot may not be used on Passover but do not need to be sold or removed from one's ownership. Kitniyot should be stored away from kosher for Passover food.Passover Sacrifice
In Temple times, the Passover sacrifice was to be eaten with one's family and possibly with neighbors, depending on the number of people present. The only two instances of kareit (being cut off spiritually) for not doing a positive commandment are for not doing a brit mila and not bringing a Passover offering (in Temple times).Seder
The Passover seder (order) was prescribed in ancient times as a means for helping all Jews, of all ages and both genders, to re-experience the transition from having been slaves to becoming free and from having ascended from idol worshippers to being monotheistic.By Torah law (d'oraita), any clean utensil, countertop, etc., automatically reverts to neutral/pareve and kosher after not being heated to more than 120° F (49° C) for 24 hours.
But by rabbinic decree, utensils do not automatically become neutral/pareve even after 24 hours and must be kashered by heat (libun—direct heat; hag'ala—boiling in a pot; or eruy rotchim—pouring boiling water over item) or, if some types of glass, by soaking in water (meluy v'eruy ).
Changing Gender of Utensil
You may kasher a pot or cooking/eating utensil from:
- Non-kosher to kosher, or
- Year-round use (chametz) to kosher for Passover.
You may not intentionally kasher a utensil in order to change it from dairy to meat or meat to dairy; you must first kasher it from accidentally (or intentionally) non-kosher to kosher/pareve, or from non-Passover to Passover/pareve. You may then use it for either dairy or meat.
Once you have used it for that gender, the item retains that gender (unless you re-kasher it for Passover or you make it non-kosher first, then kasher it to neutral/pareve).
But if you accidentally heat meat with a dairy utensil or vice versa, you may kasher it back to its original gender by any one of the kashering methods, depending on how it became non-kosher.
Items/Materials that Can Be Kashered
The following materials can be kashered:
- Glass, including Corelle, if not used directly on the stove or oven. Glass does not change gender or other kosher status unless heated on a flame or in the oven. Unless it is heated in this way, glass does not ever need to be kashered (except for Passover) (see Meluy v'Eruy, below).Glass, including Corelle, if not used directly on the stove or oven. Glass does not change gender or other kosher status unless heated on a flame or in the oven. Unless it is heated in this way, glass does not ever need to be kashered (except for Passover) (see Meluy v'Eruy, below).Glass, including Corelle, if not used directly on the stove or oven. Glass does not change gender or other kosher status unless heated on a flame or in the oven. Unless it is heated in this way, glass does not ever need to be kashered (except for Passover) (see Meluy v'Eruy, below).
be kashered except by heating in a kiln.
- Granite (not granite composite)
- Marble
- Wood, if smooth (see notes on Eruy Rotchim, below)
- Metal, including stainless steel, cast iron, and aluminum.
Items/Materials that Cannot Be Kashered
- China
- Corian
- Corningware
- Crockpot
- Formica
- Glass that has been used directly (kli rishon) on a stove or in an oven; however it can be kashered in a kiln
- Granite (composite)
- Knives with Plastic Handles (knives with wooden handles may be kashered if there are no cracks in the wood and if the rivets do not have spaces that catch food and prevent you from cleaning it completely)
- Mixer-there might be exceptions. Consult a rabbi.
- Plastic
- Porcelain (Enamel)
- Pyrex (if used directly on stove or in oven--kli rishon)
- Rubber (synthetic)
- Silestone
- Silverstone
- Stoneware
- Teflon
- Toaster/Toaster Oven
- Waffle Iron.
Pot Lid Handle
Kashering
The handle on a pot lid does not need to be kashered for normal use during the year.
Reason It does not normally get hot.
Cleaning
However, the pot lid handle must be removed and the lid cleaned where the handle attaches, if possible.
Note If the gap between the handle and lid cannot be completely cleaned, you may not use that lid for Passover and you normally may not kasher it if it becomes non-kosher. If the lid handle cannot be removed, consult a rabbi.
Pot or Pan Handle
A plastic handle that gets hot, especially if it is over a flame on a burner, may not be kashered. If the handle becomes non-kosher, it must be replaced. If a plastic handle connects directly to the metal of the utensil, consult a rabbi about what to do.
Food Nullification: Heat-Kashering
Three Methods of Heat-Kashering
Heat-Kashering is of three types: Libun, Hag'ala, and Eruy Rotchim.
-
Libun (Direct Heat)
How It Works Burns up any residual food taste
- Direct a flame, such as a blowtorch, onto the inside of a pot. Pot is hot enough when a piece of paper that touches the outside of the utensil burns (it does not need to burst into flame, just to smolder), or
- Put the pot into the oven at 500 ° F for 40 minutes. (First, remove any non-metal handles; they will need to be kashered separately or not used.)
-
Hag'ala (Boiling)
- Boil Method Boiling water within the pot to be kashered, and making the boiling water overflow, or
- Dip Method Dipping a smaller pot or utensil to be kashered into a larger pot of boiling water.
- Batel BaShishim ("nullifying in 60 times" the volume), or
- Batel BaRov ("nullifying in a majority"--that is, boiling the item in water that is more than twice the volume but less than 60 times the volume of the non-kosher element).
NoteFor whether the lid becomes non-kosher, consult a rabbi.
In Batel BaShishim, by the actual halacha, you do not need to wait at all before kashering. But the custom is to wait 24 hours--except in extreme circumstances--because it is too hard to figure out 1/60th. In Batel BaRov, you must wait 24 hours.
The Boil Method: Batel BaShishim
Using batel ba'shishim for the Boil Method is not customary. You may use it for emergencies ONLY; ask a rabbi in this case.
Example To kasher a spoon with the batel ba'shishim type of hag'ala, immerse the spoon in boiling water of a volume at least the volume of 60 spoons. No waiting is needed before kashering with this method.
The Boil Method: Batel BaRov
To kasher a pot or utensil by hag'ala using batel ba'rov:
- Clean the pot or utensil well.
- Wait 24 hours after the pot or utensil was last heated to more than 120° F, or 49° C (such as when it was cleaned).
- Fill the pot to the brim with water.
- Bring the water in the pot to a boil.
-
Cause the water to overflow the entire rim of the pot by:
- Plunging something hot into the pot (any item that will not cause the water to stop boiling is OK), or
- Tilting the pot to slosh water over all of the pot's rim.
- Cool off the pot by dipping it in cold water or putting it under cold running water.
- If the pot in which you are kashering the items had been heated to 120° F (49° C), with food of that gender in the pot, or more within the previous 24 hours, the items you are kashering will assume the gender of the pot.
- If the pot in which you are kashering the items had NOT been heated to 120° F or more for at least 24 hours, any items that are kashered in it will become kosher and pareve.
- Eruy Rotchim (Hot-Water Pour)
Food Nullification: Meluy V'Eruy
Meluy V'Eruy To Kasher Glass
Halachically, “glass” includes Arcoroc, Corelle, crystal, Duralex, and Pyrex.
NOTE In pre-war Europe, where glass was expensive and hard to obtain, it was customary to kasher drinking glasses, especially for Passover, by soaking the glasses for three 24-hour periods (meluy v'eruy), as follows:
Step 1: Submerge glasses in cold water for 24 hours.
Step 2: Empty water, refill, and submerge glasses again.
Step 3: Repeat Step 2.
NOTE If any of these materials were heated directly on a flame or other heat source, they cannot be kashered by meluy v'eruy!
Foods and kitchenware (pots, pans, dishes, utensils, and containers) can absorb taste from each other and so adopt a new gender or kosher status. They can change from:
- Kosher to non-kosher,
- Kosher pareve (neutral) to kosher dairy or kosher meat, or
- Kosher Passover to kosher (or non-kosher) non-Passover.
Note You can sometimes change a utensil/container to kosher-pareve (see Kashering, below), but you cannot change a
- Gendered food to neutral-pareve, or
- Non-kosher food to kosher.
Taste Absorption
Taste gets absorbed in three ways: Heat, pressure, and soaking.
Heat
To absorb taste, and therefore gender or kashrut status, through heat, a food or utensil must be heated to 120° F or more while:
- Steamed with a halachically “liquid” food, or
- In wet physical contact with the food or utensil.
- Two hot pans, which are clean on their outsides, only transfer taste from one to the other if they are wet on the outside and are touching each other.
- A hot utensil placed onto a counter only transfers gender to the countertop if there is liquid or food at the point of contact.
NOTE Taste, gender, or non-kosher status do not travel upstream into the utensil that food is being poured from. Even if you pour hot liquid (pareve or of one gender) from a pot onto a non-kosher or opposite gender food, the genders are not transferred back through the stream of liquid to the pot, even if any or all of the elements are more than 120 degrees.
Situation You pour hot liquid from some pareve vegetables into a non-kosher sink that had hot in it within 24 hours. There are dishes or utensils in the sink.
Status The dishes do not change gender unless the hot liquid fills up from the sink onto them. If so, the dishes or utensils become non-kosher. But no gender change occurs through the stream of liquid back to the pot of vegetables.
Note If the non-kosher sink had not had anything hot (120 degrees or above) in it for at least 24 hours, no change of gender or kosher status happens at all.
Note On Passover, gender and chametz status DO get transferred through a stream of hot liquid.
Pressure
To absorb taste, and therefore gender or kashrut status, through pressure or short-term soaking, one of the items must be spicy/charif.
Soaking
To absorb taste, and therefore gender or kashrut status, through long-term soaking, the food must soak for specific amounts of time.
Note If the food or utensil is not hot (120° F or more), is not spicy/charif, and is not soaking for a long time, there is no gender or kashrut-status transfer.
Examples
You may use a non-kosher utensil for any cold food of the opposite gender, so you may:
- Eat cold (kosher) cereal out of a meat or non-kosher bowl, or
- Use a meat or non-kosher spoon to eat kosher ice cream.
Food and Kitchenware: Which Influences What
Hot or Spicy/Charif Foods
With hot (more than 120° F) or spicy/charif foods:
Foods and utensils/containers transfer taste to each other.
Cold or Non-Spicy Foods that Soak
With cold (less than 120° F) or non-spicy/charif foods that soak:
- Foods do not transfer taste to utensils/containers;
- Utensils/containers do NOT transfer taste to foods.
NOTE No substances (not salt, or any food...) absorb gender from the open air.
The 24-Hour Rule: Eino ben Yomo
Torah Law: Reverts to Kosher-Pareve
By Torah law, a utensil/container always reverts to kosher-pareve after 24 hours (since the taste of any absorbed food becomes ruined with time).
Rabbinic Law: Must Be Kashered
However, by rabbinic law, the utensil/container must be kashered before using.
NOTE Even by Torah law, a hot or spicy/charif food can revive the milk-meat or non-kosher status of another utensil/container (see below) even after 24 hours.
Accidentally or Intentionally
Food Hot and Accidentally Placed; Utensil Not Hot for 24 Hours
Kosher food hotter than 120° F (49° C) remains kosher if accidentally placed into a non-kosher, clean utensil that has not been heated to 120° F or more for at least 24 hours.
REASON After 24 hours, b'di'avad, the utensil has reverted to being kosher-pareve.
NOTE If the utensil had been “used” (heated to 120° F or more) within the preceding 24 hours, the hot food that accidentally entered the utensil would be non-kosher. Ask a rabbi for possible exceptions.
Food Hot and Intentionally Placed
If the hot food had been put into the utensil intentionally, the food would not be kosher.
REASON Chazal made a rule (takana) that if you intentionally place food of one gender into a utensil of the opposite gender and heat it to 120° F or more, the food is not kosher.
Categories of nullification of non-kosher ingredients:
- Never batel.
- Batel b'shishim when the non-kosher substance is less than 1/60th of the total volume of the food.
- Batel barov when the non-kosher substance is less than 1/2 of the total volume of the food.
Whether a non-kosher substance can be nullified in a mixture depends on 3 factors:
- Whether the owner is Jewish;
- Whether the intended eaters are Jewish; and
- Whether the non-kosher substance was added intentionally as non-kosher.
Food “Nullified in 60 Parts”:
Accidentally Adding Non-Kosher to Kosher Food
Taste: If the non-kosher substance:
- Has no taste, it is batel barov.
- Has a taste but the eater cannot taste it, it is batel b'shishim (1/60th).
Some foods do impart their flavor even if less than 1/60th of the total volume of the food and these do not ever become nullified based on the 1/60th rule. Otherwise, the non-kosher food must be:
- Less than 1/60 of the volume of the whole.
- Mixed in and not lying on the surface.
- Not intentionally added by a Jew.
- Not listed in “Foods that Never Become Nullified” (below).
Substances are only batel when they are similar (“min b'mino”). The substances must be the same type, have the same taste, and have the same appearance (the eater cannot identify them as being different).
Note In such situations, it would be batel barov from Torah (d'oraita) but batel b'shishim (1/60th) by rabbinical order (d'rabanan).
Example A piece of non-kosher meat is mixed in with kosher meat of more than 60 times the volume of the non-kosher piece. The non-kosher meat is batel b'shishim.
Note As a practical matter, this can only apply to ground meat.
Counter Example Non-kosher chocolate syrup or a non-kosher flavored extract mixed into milk or other liquid or onto a solid would NOT be min b'mino even though both are liquids, since their appearances, flavors, and substance are different.
Too Thin To Make Non-Kosher
-
Yayin Nesech
Wine that has been offered to a pagan god or used for idolatrous purposes (yayin nesech) is forbidden in any amount! -
Mixtures of Milk and Meat
Mixtures of milk and meat are not ever batel if they were cooked together.
ExceptionBatel in 1/60th if:- You cannot identify either substance AND
- The mixture is liquid in liquid or solid mixed with solid.
- Chametz
- Less than 1/60th of the volume of kosher-for-Passover food, AND
- Mixed with the kosher-for-Passover food BEFORE the holiday began, AND
- Liquid (solid chametz that got mixed up with kosher-for-Passover food is never nullified).
- Jew Intentionally Adding Non-Kosher Item
If a Jew intentionally adds a non-kosher ingredient to a food, that ingredient never becomes nullified, even if the ingredient is less than 1/60th of the total volume of food and even if the ingredient has no flavor. Note that there are exceptions when non-Jews do the action, especially when a non-Jew adds a non-kosher ingredient or adds stam yainam wine to other liquids.
-
Unflavored or Flavored Non-Kosher Ingredient
Non-Jew Adds Unflavored Non-Kosher Ingredient
Situation A non-Jew adds a non-kosher ingredient that has no flavor.
Status The non-kosher ingredient is nullified if less than 1/2 of the total (it does not need to be less than 1/60th--batel ba'shishim).
Non-Jew Adds Flavored Non-Kosher IngredientSituation A non-Jew adds a flavored non-kosher ingredient even if to impart flavor.
Status The non-kosher ingredient is nullified in 60 parts (batel ba'shishim).
Note If a Jew had told the non-Jew to add the ingredient, the mixture is non-kosher, just as if a Jew had added it. -
Stam Yeinam Added to Water
Situation A non-Jew adds—to water--stam yeinam (uncooked/non-mevushal) wine that has been handled while open by anyone other than a shomer-Shabbat Jew.
Status As long as the wine is less than 1/7th of the final volume, the mixture is kosher.Note For mixtures with liquids other than water, consult a rabbi.
- Essential Additives
- Food Bought by the Piece
- Important Food
- Permissible in Future (Davar SheYesh Lo Matirin)
- An egg laid on Shabbat will not be nullified by being mixed with eggs laid before Shabbat.
- Matza made of chadash flour will not be nullified by being mixed with matza made from yashan flour.
- Whole Insects
-
Frozen or raw chopped or ground vegetables or spices may be considered kosher even without supervision.
Reason We assume that any bugs in the food would have gotten partly chopped or disintegrated and therefore nullified.
-
If a recipe calls for chopping or grinding herbs or vegetables, you may do so without first checking them for bugs.
Note However, if you know there are bugs, you may not chop the food for the purpose of making the bugs nullified: You must still check for insects before cooking or eating the food and if you see any bugs, you must remove them.
BAKING IN NON-KOSHER OVEN
An oven that has not been used for at least 24 hours is considered, d'oraita, to be neutral/pareve, but only if it is clean. D'rabanan, it is still not kosher, but this may be useful for when you can be lenient; e.g., if there is a safek.
Note Even when baking in a non-kosher oven, you must cook the food in a kosher utensil.
INTRODUCTION TO BAKING IN NON-KOSHER OVEN
Baking in a Non-Kosher Oven
How To Tell if Oven Is Clean
To determine whether a non-kosher oven with black or brown spots is clean, scratch them:
- If the substance crumbles, the spots are OK and you may bake non-liquid food in that oven without covering the food.
- If the spots do not crumble or they remain immovable or come off in flakes rather than crumbles, consider the oven not clean.
Uncovered Food; Clean (Non-Kosher) Oven
You may cook food uncovered in a non-kosher oven if:- The oven rack and walls are clean, and
-
The food is not “liquid.”
Note Non-liquid is defined as not being liquid before cooking OR not being liquid after cooking, but the food does not need to be non-liquid at both times. Examples of “non-liquid” foods:- Apple cobbler
- Lasagna
- Meat (that will create gravy at the end)
- Pudding
- Raw fish.
Double Wrapping
When To Double Wrap
Double-wrap food before baking in a non-kosher radiant-heat oven if:- The rack and/or oven are not clean;
- The food that you are baking is liquid at any time during the cooking process; OR
- Some of the food you are baking spills onto the rack or oven surfaces.
How To Double Wrap
When wrapping food for cooking in a non-kosher oven, the wrapping material does not need to seal completely, but the:
- Food must be completely covered with two layers of foil or plastic;
- Layers must keep water vapor out from between the layers; and
- Surfaces of the utensil must all be covered.
SPILLED KOSHER FOOD IN NON-KOSHER OVEN
Kosher Food Spilling in Non-Kosher Oven
If kosher food spills inside a non-kosher oven in which you are cooking uncovered kosher food (whether liquid or non-liquid), consult a rabbi about whether the uncovered kosher food may still be eaten.
FROZEN FOOD IN NON-KOSHER OVEN
Double Wrap Frozen Food in Non-Kosher Oven
Frozen food is considered to be wet food regarding cooking it in a non-kosher oven or regarding its being neutral for dairy and meat issues: If the oven is not kosher, the frozen food must be double wrapped, even if the oven is clean.
AIRLINE MEALS IN NON-KOSHER OVEN
Heating Airline Meals in Non-Kosher Oven
Airline meals are usually non-liquid, so even if they are single-wrapped, it is OK to heat them in a non-kosher oven as long as no non-kosher food contacts the kosher food container.COOKING IN NON-KOSHER MICROWAVE OVEN
Microwave Oven: Kosher Status
Introduction to Microwave Oven: Kosher Status
If a microwave oven's walls/floor/door do not become hot (more than 120° F, or 49° C), the microwave oven does not become non-kosher, dairy, meat, or non-Passover/chametz.NoteA microwave oven that does not normally get hot, may get hotter than 120° F if you cook:
- A liquid or moist food for a long time (even if less than 10 minutes),
- Several liquid or moist items sequentially, or
- Popcorn and similar foods.
If a microwave oven's walls/floor/door get hot, the oven can become dairy, meat, or non-kosher (if they become one gender and then the opposite gender is cooked or if non-kosher food has been cooked in it). If any surface--including walls, door, floor, etc.--that gets hot are plastic or coated metal, it cannot be returned to kosher or pareve. However, if the surfaces are all made of metal, they may be kasherable. Consult a rabbi.
Microwave Oven: Kosher Status: Walls and Door
Since microwave oven walls and doors do not normally get hot (more than 120° F, or 49° C), there is usually no need to kasher them from milk to meat (or back to milk); from ordinary use to Passover use; or from non-kosher to kosher. Just clean all surfaces.Microwave Oven: Kosher Status: Floor
Microwave oven floors can get hot, especially where there is no rotating glass tray and the utensil is placed directly on the oven floor. All microwave ovens should be assumed to get hot unless you have tested them personally.
Microwave Floor
Cover the floor (ideally with styrofoam or another substance that blocks heat and moisture) in a non-kosher microwave oven.
Glass Tray
The glass tray does not become non-kosher and does not become dairy or meat or chametz (unless it was removed and used in a conventional oven) as long as it is clean.
Plastic Tray Support
The plastic support under the glass tray must be cleaned and must be blocked from contact with actual cooking utensils and from food if the tray:
- Has any food of the gender opposite that of the food being cooked,
- Has non-kosher food on it, or
- Is dirty and you cannot tell with what.
How To Check If a Microwave Oven Will Get Hot during Cooking
To determine if the walls of a microwave oven will get hot during cooking:
- Boil water for as long as food would typically be cooked in that microwave oven, and
-
Touch the inside walls, floor, door, and ceiling
- If the walls are too hot to touch, the walls may acquire the gender of any food cooked in the oven. (If the walls are already the opposite gender when cooking a food, the oven may become non-kosher.)
- If the walls are not too hot to touch, then no change of status occurs.
Non-Kosher Microwave Oven: Hot Oven, Liquid or Solid Food
If the walls of a non-kosher microwave oven get hotter than 120° F, you must double wrap any liquid or solid food you cook in that oven.
Non-Kosher Microwave Oven: Non-Hot Oven
If the walls of a non-kosher microwave oven stay less than 120° F, you do not need to wrap or cover liquid or non-liquid food, as long as:
- The microwave oven is clean and dry, and
- If the tray is non-glass or non-Pyrex, you put a layer of separation (plastic, styrofoam, etc…) that blocks heat and any moisture underneath the cooking utensil.
COOKING ON NON-KOSHER STOVE
Setting Down Hot Lid on Non-Kosher Stove Top
SituationYou set down a hot pot lid on a non-kosher stove top.
Status
- Lid is dry and stove is clean: lid remains kosher.
- Lid is dry or wet and stove is dirty: lid is non-kosher.
- Lid is wet and stove had hot non-kosher mixtures on it within the previous 24 hours--even if the stove is clean: lid is not kosher.
- Lid is dry or wet and stove is clean and did not have hot non-kosher mixtures on it within the previous 24 hours: lid is kosher.
COOKING WITH NON-KOSHER UTENSILS
Using a Non-Kosher Kitchen UtensilIntroduction to Using a Non-Kosher Cooking Utensil
You may not use a non-kosher cooking utensil (pot, pan, baking dish, etc.) for cooking even if the utensil is clean and has not been used for more than 24 hours (unless you kasher it first).
Fruit Cut with Non-Kosher Knife
You should wash most fresh fruit cut with a non-kosher knife in order to remove whatever non-kosher food might have been on the knife from before.
Note Fruit with a sharp taste—such as lemons or tart apples—may not be used if cut with a non-kosher knife, regardless of whether the knife had been used within 24 hours.
WASHING IN NON-KOSHER SINK
Using a Non-Kosher SinkA dish is still kosher b'di'avad if heated to 120° F (49° C) or more in a clean, non-kosher sink that had remained below 120° F for the previous 24 hours.
A printed copy may also be useful as a guide to a specific siddur. Before the prayer service takes place, the actual page numbers may be copied from the siddur onto the pages of the Guide for quick reference during the service. (This could be done by the user or by someone who is more familiar with the prayer services, as an aid to help the user follow what is going on.)
Each individual says most of the prayers, but the leader sets the pace. He says out loud the last line or two of many paragraphs (and sometimes the next paragraph's first few words), to help others find where he is in the prayers.
Hint If you get lost, listen to the leader and try to find those words at the beginning or end of one of the paragraphs near where you think you should be!
Saying Amen
When the prayer leader/chazan says a blessing (Baruch ata adonai...) and finishes the final word, everyone usually replies amen.
Baruch Hu U'Varuch Shemo
It is common (but not required) to say baruch hu u'varuch shemo after hearing God's name (Adonai) when it is said in a blessing.
Note Some people say the phrase very loudly and slowly (pretentiously), but this wrong practice may prevent themselves and others from hearing the blessing's end and knowing when to say amen.
NoteIf you need to use the toilet between baruch she'amar and yishtabach, say asher yatzar after saying yishtabach and before saying yotzeir or.
Ma Tovu
Upon arriving in synagogue in the morning, say Ma tovu....
Talit
Married men (and also those with a tradition to wear a talit from bar mitzva age) normally put on their talit gadol on all days (except Tish'a b'Av morning).
For more details, see Talit (Gadol).
Tefilin
On weekdays, all men put on tefilin. They do not interrupt putting on tefilin to respond to other's prayers, not even to say amen.
For more details, see Tefilin.
Birchot HaShachar/Initial Blessings
If you have not yet said the initial blessings beginning with asher natan... through the end of ven brit, say them once you are in synagogue and after you have put on talit/tefilin (if relevant).
Everyone stands while the prayer leader reads the initial blessings aloud. They say amen after each one.
L'Olam Yehei Adam/Shema
L'olam yehei adam is said quietly, with everyone saying the shema line together.
Order of the Sacrifices
Some read (quietly) the order of the sacrifices.
13 Principles of Talmud Explanation/Kaddish
- The 13 principles of how the Talmud is explained are read quietly.
- Kaddish is said by any mourners.
- Everyone says, amen, yihei shmei raba...
Mizmor Shir/Kaddish
- Mizmor shir is read quietly.
- Another kaddish is said by the mourners.
Baruch she'amar is said by everyone, standing. The leader says the final blessing out loud.
Verses (Psukim)
The following several pages are verses (psukim) from various sources, said by everyone quietly.
- Everyone stands to say mizmor l'toda quietly (just for this paragraph).
- The next paragraph (yehi chevod) is read quietly.
Ashrei and 5 Psalms
Ashrei and the following five psalms (#146 to 150) are said quietly by everyone; the leader says the final line or two out loud.
Baruch Adonai L'Olam Amen v'Amen
Baruch adonai... is said by the leader.
VaYevarech David
The next section (from va'yevarech David until after bar'chu) is said quietly by everyone while standing.
Shirat HaYam
Shirat ha'yam is read quietly by everyone.
Yishtabach/Kaddish
Yishtabach is said quietly by everyone together. The leader says the final line of yishtabach out loud and then kaddish.
Bar'chu
- The leader says Bar'chu et Adonai ha'mevorach.
- Everyone bows from the waist and replies (aloud), Baruch Adonai ha'mevorach l'olam va'ed (which is then repeated by the leader).
- Everyone says the blessing's ending ...u'vorei et ha'kol.
Shema and Its Blessings
The next paragraphs lead up to the shema:
- Leader says, “Et shem ha'el...”
- Everyone says aloud, together: Kadosh, kadosh, kadosh... and Baruch kevod Adonai mi'mkomo.
- Leader says the final line or two of La'el baruch ne'imot... and everyone responds amen.
- Everyone says ahavat olam quietly.
-
Leader reads the final lines aloud.
Note It is the custom to not say amen to the blessing before shema.
- Everyone says the first line of the shema together and aloud, but Baruch shem... silently.
- Everyone reads the shema individually, and the leader repeats out loud Adonai eloheichem emet.
- Everyone reads the next paragraphs, through ezrat avoteinu, together, quietly.
Mi Chamocha
Stand for Mi chamocha until after the amida.
Adonai Yimloch
Everyone reads together and aloud: Adonai yimloch... until the final blessing before the amida.
Note At some time before completing that blessing, step back far enough (one large step is fine) so that you can take three small steps forward to begin the amida. If there is no room to step back, you may pray the amida without stepping forward.
The Amida
Amida: Details and Direction
For more details on saying the amida, see What To Pray: Set Prayers: Amida
For where to face during the amida, see Amida: Location: Where To Face
Stepping To Begin the Amida
After saying ga'al Yisrael, symbolically approach God by taking three steps forward (any size of steps is fine):
- Step forward with your right foot,
- Step forward with your left foot, and
- Step forward with your right foot.
- Bring your left foot to meet the right one, so that both feet are touching at the heels and at the balls (so that you are standing as if you had one leg, like the angels!)
Next, with your feet still together, do knee-bowing at the start and end of the first paragraph. You will also be bowing at:
- Beginning of modim (waist-bowing).
- End of modim (knee-bowing at Baruch ata Adonai of the blessing ending u'lecha na'eh l'hodot).
Slach Lanu
In slach lanu, when saying ki chatanu and ki fashanu, hit your chest over your heart with your fist.
Reason We are saying that we sinned, so we strike our heart for leading us astray.
Ending the Amida
Symbolically take leave of God by taking three steps back after Adonai tzuri v'go'ali:
- Step back on your left foot,
- Step back on your right foot,
- Step back on your left foot (and then place your right foot next to your left foot).
- Bow to the left while saying Oseh shalom bi'mromav...,
- Bow to the right while saying Hu ya'aseh shalom alenu, and
- Bow to the middle (straight in front of you) while saying Ve'al kol yisrael v'imru amen.
Reader's Repetition of Amida
At kedusha, everyone stands (even if they were sitting so far for the amida's repetition) with their feet together, again imitating the angels who only have one leg.
- The leader says nekadeish (in some places, everyone says nekadeish).
- Everyone says the next line together (kadosh, kadosh, kadosh...).
- After the leader says Halleluya, everyone else may move their feet (or sit down, if that is their custom).
- On fast days, the leader says an extra paragraph in shacharit (other paragraphs in mincha are said by everyone).
Tachanun
When To Say Tachanun
Tachanun is usually said on weekdays.
How To Say Tachanun
Tachanun is said differently, depending on if there is a Torah scroll in the room, as follows:
- Say Va'yomer David sitting down, while resting your head on your left arm (unless you are wearing tefilin on your left arm, in which case lean onto your right arm).
- When you reach shomer Yisrael, lift your head up and sit normally while saying the paragraphs until v'anachnu lo neida ma na'aseh.
- Before saying “na'aseh,” stand up for the remainder of tachanun.
- Say tachanun standing until Va'yomer David... at which time, everyone sits down.
- Follow the directions above for the remainder of tachanun.
Hallel
- When hallel is said, most of the psalms are said quietly by everyone. (In some synagogues, several of the psalms are sung in unison.)
- The lines beginning Hodu l'adonai... are read aloud by the leader.
- Everyone else responds aloud, Hodu l'adonai... and reads quietly the next line (which the leader then reads aloud when they finish).
- Similarly, Ana adonai is read responsively by the leader, followed by everyone else.
Kaddish
The leader says kaddish out loud.
Torah Reading (Mondays and Thursdays)
- Everyone reads quietly the phrases va'yehi be'nso'a... and brich shmei.
- The Torah is taken out and carried to the bima.
-
As each man (called an oleh) is called up to the Torah:
- The oleh says Bar'chu...
- Everyone responds Baruch Adonai....,
- The oleh repeats that line and says a blessing.
- Everyone answers amen.
- After each reading, the oleh says one more blessing and everyone replies amen.
- After the third aliya, the Torah is lifted up.
- Everyone says, V'zot haTorah....
- The Torah is rolled and wrapped.
- Meanwhile, the leader reads four paragraphs beginning, Yehi ratzon mi'lifnei avinu...
- The final paragraph, Acheinu kol bet yisrael... is read by everyone aloud.
- The Torah is put back while everyone reads two psalms quietly.
Ashrei/U'va L'Tzion
- Everyone reads ashrei quietly, followed by la'menatzeiach and u'va l'tziyon.
- Everyone together says, Kadosh, kadosh, kadosh and Baruch kevod.
Kaddish
The leader says kaddish.
Alenu
Everyone says alenu together.
Kaddish
Mourners say kaddish.
Psalm for the Day
Psalm for that day is read by everyone.
Kaddish
One more kaddish is said by the mourners.
L'David
- During Elul and into Tishrei, L'David is read by everyone.
- One more kaddish is said by the mourners.
Praying Ma'ariv
V'hu Rachum
Everyone reads the two introductory lines of v'hu rachum.
Bar'chu
- Leader says bar'chu.
- Everyone else responds, baruch Adonai....
- The leader repeats that line.
- Everyone reads the next paragraph/blessing.
- The leader says that final line out loud.
- Everyone responds amen.
Shema and Its Blessings
- The leader repeats the final two words of the shema and the word emet.
- Everyone continues quietly saying the phrases until Mi chamocha.
- Mi chamocha is said by everyone together including by the leader, who then also reads the next line.
- Everyone says Adonai yimloch... together, continuing through the end of the next blessing, which is repeated by the leader.
- Everyone says hashkiveinu quietly.
- The leader says the blessing shomer amo Yisrael la'ad out loud.
- Baruch Adonai l'olam... is said through to the end by everyone quietly.
- The leader says the final line and the final blessing out loud.
Kaddish
The leader says kaddish.
Amida
Everyone says the amida silently and individually.
Kaddish
The leader says kaddish.
Alenu
Everyone says alenu together.
Kaddish
Kaddish is said by any mourners.