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

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Is it OK to eat non-certified-as-kosher sushi?

I've heard the argument that since everything in sushi is raw (assuming there are no non-kosher ingredients), and that since the rice is cooked in a rice cooker that is used only for rice, it's OK to ...
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Is Red Bull™ kosher?

Is the Red Bull™ energy drink kosher?
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318 views

Is there anywhere in the world I can still get a hot chocolate without a hechsher?

~150 years ago in Eastern Europe, the Kitzur Shulchan Aruch wrote that you could usually go buy a coffee, tea, or hot chocolate without having to worry about its kosher ingredients (or bishul akum). ...
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Why is kosher wine or grape juice rare alone but less so as an ingredient?

My understanding is that wine or grape juice is s'tam yenam and forbidden if handled by non-Jews without having been cooked. (See, e.g., an explanation on chabad.org.) The practical result of this, ...
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239 views

Can Whole Fruits or Vegetables Have Non-Kosher Additives?

Many (perhaps all?) fruits and vegetables grown these days contain various "other stuff" such as pesticides and protective coatings. I suppose that fruits whose peels are removed do not pose a ...
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Hagala for a new pot

I know that there is a halakhic necessity to tovel a new pot. However, has anyone ever heard of the halakhic necessity to do hagala on a new pot? Reason for asking was this.
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671 views

Is there a kashrus issue with paper towels?

Is there any concern about using paper towels with hot food? I know there are some who advise against using the first few and last few sheets during Pesach, due to the presence of starch-based glue ...
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421 views

Does electronic cigarette juice require a hechsher?

Does electronic cigarette "juice" need to be kosher (require a hechsher)? Does it matter what flavor the juice is?
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369 views

Does flavored dental floss need a hechsher?

You can find flavored dental floss these days usually in the flavor of mint. Is there anything to worry about or is it no worse than mint mouthwash? If not, doesn't the gemarah in berachot 6th perek ...
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84 views

How can yeast be kosher lǝPesach?

I was once reading the ingredients on a pack of Bissli (with a Pesach hashgacha) and saw that it contained yeast. How can this be?
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81 views

Can rags and oven mits become non-kosher or be kashered?

If kitchen rags or cloth oven mits have been used in a non-kosher kitchen, may they be used in a kosher kitchen after they are laundered? Or do they become non-kosher (for example, from contact with a ...
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360 views

Is the cat figurine thing a problem at kosher Chinese restaurants?

It seems like all kosher Chinese restaurants have this cat-statue thingy in the front: Is there any Halachic problem with that? I assume not, if they're all kosher-certified; but why not?
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342 views

Confectioners glaze - non alcoholic

Recently I read an article by Rabbi Yirmiyohu Kaganoff regarding confectioners glaze. Confectioners glaze is manufactured from shellac, "a glandular secretion of the lac insect, Kerria lacca, a ...
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157 views

Shechting non-Kosher animals

The question was asked: If someone for example is sick and must eat from a non-kosher animal. Must it be shechted (slaughtered) first like a kosher animal? I don't see any reason why it should, since ...
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360 views

Forms of Kashering a knife

I remember hearing that a knife can be kashered (from being treif) by sticking it in the ground. But I also know you can use the traditional kashering methods - Hag'ala and Libun. I have 2 ...
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216 views

Need to kasher a knife after sticking oneself

If I poked myself with a knife and possibly got blood on it; does it have to be kashered.
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How do you look into a Pesach program?

I often hear that Passover programs are fraught with potential issues, primarily in the area of kashrus, but also with the reliability of the Rabbanim there and other issues. How can one go about ...
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204 views

Can I use a Keurig coffee machine if someone else has used a non-kosher “pod”?

My office has a Keurig machine. They work by inserting small plastic cups, called "pods", that contain coffee or other items. As I understand the machine's mechanism, hot water drips through the pod ...
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75 views

Can someone swear off something that is already prohibited to them by halacha?

Can someone swear off something that is already prohibited to them? For instance: "I swear I won't eat non-kosher."
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142 views

Place Mats - Why and When?

When are placemats needed when eating, and why are they needed?
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Eating in someone's home who eats in non kosher restraurants

Can one eat at a friend's home who keeps a kosher home but eats at non kosher restraurants?
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Must I warn people about an untrustworthy restaurant?

What is my obligation to warn fellow kosher observant people about a Restraurant that is claiming to be "Glatt" Kosher, when in fact it has no Rabbinic Supervision at all and the owner's religious ...
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How does one do Hagalah above 12,000 feet?

How does one do Hagalah above 12,000 feet, where water's boiling point falls below 190°F? Under normal circumstances, the water will not be Rochsim, and therefore unsuitable for Hagalah. Using a ...
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166 views

How to prevent holes when double wrapping food?

When cooking milk in a meat oven (or kosher food in a treif one) I often find that when one wraps using aluminum foil, small holes appear (probably from the heat). I was wondering if anyone knows a ...
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Cultured Beef and the 7 Laws of Noah

I know there have been questions on whether lab meat would be Kosher or not, halavi or besari... I see another potential debate. According to http://culturedbeef.net/what-is-it/, "Cultured Beef is ...
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623 views

Eating in less-religious homes

May one eat a meal in the home of one who attended yeshiva and who one considers trustworthy vis-a-vis making sure everything is kosher for their guests, however, one is reasonably certain they do not ...
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589 views

Working in a non kosher yogurt store

I was asked a question this afternoon and I don't know a good answer (yet) so I'm posting it. I have been asked in the past whether a Jewish person may work in a non-Kosher restaurant that serves ...
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165 views

What is “blood that moved from one place to another”?

I'm learning laws of salting in the Shulchan Aruch. One concept I'm battling to understand is "דם שפירש ממקום למקום" - blood that moved from one place to another. Here's a good example of my ...
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279 views

Buying non-Kosher food for home Emergency Kits

The United States federal government, American Red Cross, and surely countless other governments and NGOs recommend that families have Emergency Survival Kits in their homes in case of a natural or ...
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The stolen maple syrup and kashrus

Does anyone know if there is going to be a kashrus problem with maple syrup next year? A rather large amount of maple syrup was stolen last year. The thieves did not keep it in the original casks, ...
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408 views

Fresh fish need hechsher

Does fresh fish from a supermarket or fish market require a hechsher? I would be tempted to believe that a fish known to be of a kosher variety would not need certification since there is no shechita ...
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406 views

Invitation to nonkosher restaurant

The question "Keeping Kosher at a secular company" asks about food issues on the job in general. This question is focused more narrowly on "unbalanced" situations: situations where there's an ...
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Is it possible that Judaism would one day allow eating pork?

As far as I understand, pork was originally banned from consumption since it was hard to maintain a clean enviroment for pigs in a desert climate (as summarized in the Wikipedia). Since nowadays ...
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Which hechsheirim are reliable?

How can I find out which hechsheirim are reliable and which ones aren't?
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Is the Halachic concept of taste transfer accepted by scientists and chefs?

Halacha (Jewish Law) tells us that when food is cooked in a pot, that pot absorbs the taste of that food (to what degree is impossible to know). When that pot is then used to cook something else, the ...
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385 views

Where is the story of the medieval rabbi who ruled a fish was non-kosher because of his dream?

If I recall correctly there's some fish whose kosher status is questionable; a medieval rabbi (Rishon) ruled it was okay, then had a dream that night where all his students were sitting around and ...
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Who certified this yogurt as kosher?

Looking at unclear heshers on some yogurt packages: Dannon "Light and Fit" yogurt has a capital K without any other identifier. Yoplait "Light" has a capital K D. I was told that the letter K alone ...
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“Blias” in today's pots and pans

Throughout all of Yoreh Deah Chelek Alef and Hilchos Pesach (and perhaps other places in Shulchan Aruch as well) we see the idea of "blias" ("absorptions") by celim. That is to say there is a "taste" ...
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kashrus of mouthwash, toothpaste, lip balm

What are the halachic and factual issues involved in, and various rabbis' holdings on, whether flavored mouthwash, flavored toothpaste, and flavored lip balm need to be kosher, or need a hechsher ...
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Any information about Rabbi Barnett Hasden's “Ner Tamid K” hechsher?

Does anyone here know anything about the reliability of "Rabbi Barnett Hasden of Ner Tamid K in Staten Island, NY"?
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Does consuming raw meat make one Fleishigs?

If one is making meat, and while the meat is still raw licks his/her fingers, does s/he become Fleishigs (to wait the appropriate amount of time before eating dairy)? Essentially if we boil (excuse ...
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Why isn't eating milk with chicken kosher?

I remember learning that the reason you don't eat milk with beef is because you shouldn't cook a calf in its mother's milk. However, when you are dealing with two different species, this same logic ...
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216 views

Milk and Meat of Non-Kosher Animal Species

Is cooking milk with the meat of non-kosher animal species the same problem as cooking milk with the meat of kosher animal species? In other words: can a Jew cook milk with a non-kosher animal ...
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67 views

Is pasteurization an adequate stand-in for something being mevushal?

I have a bottle of Lakewood Organic Concord Grape Juice. It is certified by Kof-K as pareve and kosher for passover. However, I cannot find anything on the bottle that would indicate it to be ...
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265 views

Is it permitted to lick the adhesive on an envelope?

While most stamps are now self-adhesive, most envelopes still require moistening the adhesive in order to seal it. Is it a kashrus problem to lick the envelope's adhesive?
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What possible Kashrus concerns may exist with these vitamins?

Recently my child's Doctor prescribed vitamin drops for my infant son. When I went to the pharmacy to fill the prescription the pharmacist said that the vitamin drops prescribed are Treif, and the ...
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Powdered Milk - Chalav Yisroel

I have a child with a milk allergy. He will be undergoing a "baked milk" food challenge shortly. For this I need to bake him muffins with powdered milk. I have found several brands of kosher powdered ...
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137 views

Timing of the Commandment of Gid Hanashe

The Torah mentions, after the story of Yaakov getting injured in Parshas Vayishlach, that we do not eat the Gid Hanashe for this reason. The Meforshim seem to concur that this mitzvah was included in ...
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How does shechita (kosher slaughter) actually work?

If I understand correctly, the classical Halachic requirements on kosher slaughter only discuss cutting the trachea and esophagus. Is that enough to kill the animal quickly (and painlessly?) What ...
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Is aged beef salted and soaked before or after the aging process?

Some kosher butchers are now offering aged beef. Is this meat salted and soaked before or after the aging process?