Kashrut (also kashruth or kashrus, כשרות or כַּשְׁרוּת) is the set of Jewish dietary laws.

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Coca Cola on Pesach

Yabia Omer writes that Citric Acid isn't a issue on Pesach. Does that deem Coca Cola Kosher for Passover even without a hechsher as a Sefardi?
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Reheating Food Cooked Before Passover

Let's say a family cooked some non chametz food before kashering their dishes before Pesach and saved the leftovers to be reheated later. A few days go by and Pesach gets closer, and they kasher all ...
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1answer
79 views

Getting Married With Different Customs

B'H I'm getting married in a few months and my fiancée waits 3 hours between meat and milk and I wait 6. In general, does a wife take on all the customs of her husband? In my example, would she have ...
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2answers
41 views

How to tell if can use bird feed on paisach

How can I tell if this bird feed can be used Ingredients: White preso millet, golden german millet, red proso millet, flax seed, canary grass seed, niger thistle, rape seed, oat groats, dehydrated ...
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6answers
2k views

Are sea sponges kosher?

The sea sponge is scientifically classified as an animal, therefore maybe it would be considered unkosher, as seafood. On the other hand, it seems much more similar to a vegetable of some kind, so ...
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2answers
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Where does the concept of food transfer come from?

If I cook a cheese omelet in a skillet, then wash the skillet and cook a steak in the same skillet the steak is considered to have absorbed the dairy-ness of the cheese and is now consider not kosher. ...
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1answer
86 views

What is today's Jewish explanation for why rabbit meat is unkosher?

In yesterday's parasha, we read not to eat rabbit meat because it chews its cud (Vayikra 11:6): "ואת הארנבת כי מעלת גרה " Today, we know this is not true. I am curious as to how religious Jews ...
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1answer
83 views

Who accepts the “chazaka” method of checking vegetables?

Several sources endorse a method of checking produce in which the batch of produce is washed, three random samples from the batch are inspected for bugs, and, if these samples are entirely clear of ...
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Are the non-meat parts of a non-kosher (i.e. impure/tameh) animal ossur min haTorah

In a different question it was asked if the blood of a non-Kosher animal is forbidden under the same issur that blood from a kosher animal is forbidden. It's brought there from that Rambam that: ...
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2answers
212 views

Animals vs. plants: kashrus

Why did God make all plants, but only some animals, kosher? Sources, please.
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24 views

Why do we exclude fruit and vegetables? [duplicate]

We see in Vayikra, chapter 11, lists of kosher animals (land, water, and flying), but I don't see any mention of vegetables? Why did the Torah leave out vegetables when it speaks of kashrut?
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How to keep a yoshon kitchen [duplicate]

Yoshon refers, very roughly, to grain products that have grown through at least one Pesach. Some have the stringency to eat only yoshon grains. How does one go about identifying yoshon flour and ...
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3answers
221 views

What are the kashrut issues with kosher food at a non-kosher restaurant?

What are the major kashrus/halachic issues with going to a non-kosher restaurant and ordering, say, [kosher fish] and vegetables; dressed with only extra-virgin olive oil, salt and pepper; double-...
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Can a Torah be made using parchment from a neveilah or treifa? [duplicate]

I read (will edit source, when I locate it) that the parchment used from a Torah must come from a "kosher animal". Does the term "kosher" mean "edible" or just an animal that is among the list of ...
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1answer
72 views

Do you have to check eggs that have a hechsher?

In general, one checks the yolks of raw eggs for blood spots before using them. However, is it strictly necessary to do this with eggs that have a hechsher on the box? Please provide an authoritative ...
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2answers
304 views

Can one trust the Kashrut of Alcoholic Beverages in bars?

Kosher organizations, like the CRC (Chicago Rabbinical Council), supply lists of alcohol recommended for purchase and consumption. May one purchase these alcoholic beverages from a bar (where the ...
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5answers
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Is Extra virgin olive oil kosher by default?

I was given extra virgin olive oil as a gift from Italy (picture below), and I wanted to see if that type of olive oil is treated like fruits and vegetables, or does it needs to have certification on ...
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2answers
197 views

Are GMOs Kosher?

Currently taking a biology class in which genetically modified foods were discussed. Some of the plants had DNA from non kosher animals added into the plant genes. How does this impact the kashrus of ...
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1answer
679 views

Is human flesh a kosher food?

Is human flesh a kosher food? Please provide both modern and classical sources.
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110 views

Current Chicken Controversy in Jerusalem [closed]

The original questioner asked the following: What is the kashrus problem with Eida Chareidis Chickens, and why does the Eida think its not a problem? (kikar.co.il/194374.html – @kouty) However this ...
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1answer
63 views

Eat a chicken food with milk is allowed?

I wonder if eating a chicken food in which its ingredients take milk or cheese is allowed. (For example: Eat a Chicken Stroganoff; Or a chicken stew with sour cream ...)
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2answers
102 views

Need for Certification of Sake

Does anyone know why all the kashrut organizations (that I know of), require all sake (the Japanese alcohol) to have a hechscher? I would think that since junmai sake is required by law to contain ...
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1answer
80 views

Whale-yeast Beer

This article describes a beer created with yeast from fossilised remains of an ancient whale. From what I understand, the yeast imparts certain characteristics to the beer other than alcohol content. ...
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6answers
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Is there a problem with Triangle K? If so, what?

I want to know what the OU's or any other Orthodox kashrut agency's problem is with Triangle K. I have read about the Ralbag family which founded and runs the Triangle K and they are clearly Orthodox. ...
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1answer
118 views

Cholov akum and cholov yisroel

Is cholov akum 100% treif (not kosher)? If so why does it get a hechcher (kosher supervision stamp)? And if it's not treif, is it assur (forbidden)?
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1answer
61 views

Eating non-kosher food then drinking out of kashered cup?

Does drinking a cold drink several minutes after eating cold non-kosher food render the cup non-kosher since it is making contact with the mouth, which may still have remnants of non-kosher food in it?...
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2answers
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Why dont yeshivos and summer camps have kashrus hashgacha?

We dont rely on eid echad neeman beisurin in our local stores, so why do we rely on the owners of most schools and camps that everything is kosher?
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Jewish owned dough bake by a non jewish baker

It states in shulchan aruch yoreh deah 112 11 "bread of a jew that a non jew baked without a jew's stirring or adding fuel, is forbidden to sell to a non jew lest a Jew buy it from the non jewish ...
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61 views

Kashruth of Terra Cotta

What are the halakhoth regarding unglazed terra cotta flower pots? Does it absorb? Can it be kashered, and if so, how? Sephardic rulings preferred, but will take any sources.
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Is AquAdvantage salmon kosher?

After two decades of deliberation, the USA's Food and Drug Administration has approved the first ever genetically engineered food animal, a fast-growing Atlantic Salmon called AquAdvantage salmon. ...
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3answers
416 views

Does Neveilah/Tereifah make you Fleishig?

Another question asks whether meat of a non-kosher species (Behemah Temeiah or Hayah Temeiah) makes one Fleishig (considered to have eaten meat, so cannot eat milk). My question then is about kosher ...
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0answers
58 views

Is it permitted to share a plate or bowl with a pet (such as a cat or dog)?

Is it permitted to use the same plates and bowls to feed a pet cat or dog which are also used for eating? Assuming the pet is fed kosher (for humans) food is this permitted? Are there any issues ...
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2answers
59 views

Is there spiritual meaning behind Kosher?

Is there spiritual meaning behind Kosher? What do the Rabbis, Torah, Talmud and so on say about this question? (I know many say that we don't know. This is a question for those who have a spiritual ...
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3answers
545 views

What rules need to be followed in order for a non-Jewish professional chef to cook Kosher food for a Jewish customer?

I'm a non-Jewish professional chef in a restaurant, and I am marginally aware of kosher dietary restrictions. I know that the food itself, as well as the pots, pans, and other utensils used in ...
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0answers
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Untoiveled but used dinnerware and cookware - how to salvage if possible? [duplicate]

What's the deal with untoiveled, but used, dinnerware and cookware? Can they still be toiveled to make usable/kosher or must it all be tossed?
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1answer
67 views

Drinking coffee using non-kosher utensils

Is there a legitimate heter for drinking coffee from a coffee cup that would most likely have been washed with non-kosher utensils? I have seen people be lenient in this respect, but don't know why.
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4answers
626 views

Can you buy a beggar non-Kosher food, or chometz on Pesach?

If I am asked for money by a beggar on the street, or see a homeless person with a sign, I try and give them food as it is usually more useful than money (which will probably be used for alcohol or ...
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1answer
27 views

What are the alternate signs for a kosher fish?

In addition to the signs for a kosher fish mentioned in the Torah, The Tur (Y.D. 83) brings alternate kosher signs for fish that are not accepted by all Poskim. Namely, the head of a kosher fish is ...
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4answers
2k views

Starburst Fruit Chews kosher?

Are Starburst Fruit Chews kosher? This website below clearly has an OU on the right side. However, Gelatin appears on the ingredient list, and the oukosher.org website doesn't have any reference to ...
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3answers
3k views

Which hechsheirim are reliable?

How can I find out which hechsheirim are reliable and which ones aren't?
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565 views
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1answer
273 views

Non-kosher, non-Jewish-run, Sushi Restaurants

Is the food served at a non-kosher, non-Jewish run sushi restaurant considered non-kosher because of the non-kosher-ness of the knives, the bishul akum of the rice, or both?
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4answers
162 views

Where in the sources do we find a list of kosher birds?

In the parsha this past week (re'eh) we find a list of birds that are not kosher. This is unlike the Torah's approach to mammals and fish, where we are told to identify those that are permitted by ...
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4answers
219 views

Comprehensive list of Kosher Products

Is there a comprehensive list on the web of all kosher products?
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If you check for bugs according to halachic requirements, and then there is a bug in the food, are you liable?

If one or one's wife does everything that is needed for checking, but one accidentally eats a bug anyway, is one liable for the sin(s)? I'd also be interested in knowing whether one would be liable ...
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Why do soft cheeses made by gentiles, like cottage cheese, have a hechsher, while others like mozzarella not have a hechsher?

I noticed Rav Abadi says all soft cheeses made by gentiles are kosher. Do other poskim also hold like him? If yes please post who. Both cottage cheese and mozzarella require rennet, so I'm not ...
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1answer
167 views

Is a klipa davuk?

There are many places in the realm of kashrut where something may become forbidden kedei klipa (just the edge is asur). For those who hold by isur davuk (as isur which is attached to something else - ...
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1answer
135 views

How much aged cheese is needed in a cheese mix to require waiting 6 hours?

According to Remo in Shulchan Aruch Yorah De'ah a9:2 as referred in this OU article, people should wait 6 hours after eating hard cheese. Let's say someone eats a type of cheese that is partially ...
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kasher a nonkosher Le Creuset pot? [closed]

I have several Le Creuset pieces - Dutch ovens and casseroles - that I inherited. They have not been used for 15 years, but definitely were used for non-kosher cooking; it's safe to assume they might ...
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80 views

Identity of Star-of-David kosher symbol

What is the certifying agency that uses a kosher symbol comprised of a Star-of-David containing another odd-looking symbol within it?: It is carried by, e.g., Byrne Dairy milks (of New York State)....