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

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Can meat grown from living cells be kosher? Is it eiver min hachai?

Earlier questions such as In vitro meat — further questions dealt with meat grown from stem cells of slaughtered animals. This question is specifically about meat grown from stem cells taken from live ...
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Why do we benefit from chocolate bars with no hechsher, but not eat them?

We don't eat chocolate bars with no hechsher. What are we afraid might be in them, whether through the equipment or directly? Let's take the case of a dairy chocolate bar that wouldn't be served in ...
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3answers
591 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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Creating a crowd-sourced database of non-dairy OU-D products

Several questions/answers on this site have pointed out that the OU-D hechsher does not always mean that the product is actually dairy. (But that it is, in reality, "OU-DE" [dairy equipment]. See here ...
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Is it permitted to benefit financially from a meat/milk mixture that is rancid / rotten / otherwise inedible?

One is not permitted to derive benefit from a mixture of meat and milk. I'm curious -- would that prohibition still hold if the meat & milk mixture were inedible? I have no idea how one would ...
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Why aren't any of the main American brands of chewing gum kosher?

These days, you walk into any American supermarket, you can find kosher chocolate bars, kosher jelly beans, kosher all sorts of stuff. I understand why the gummy worms aren't kosher, they contain ...
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114 views

Is Cup-K reliable?

I've recently seen a hashgacha around NYC called Cup-K or CupK. However, I have been able to find precious little about it and what I have found seems mostly to consist of unsubstiatable rumours. Does ...
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1answer
104 views

Must one use a separate grill for meat and fish?

As there is a prohibition of mixing meat with fish because of sakana ("danger"), I assume that if one has a small grill, one cannot grill meat and then grill fish (or vice versa) without cleaning the ...
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118 views

How many degrees of separation from food does one have to kasher?

I understand that the sink, the dishwasher, and sponges, etc. all need to be kashered, presumably because they touch things (plates, utensils) that also touch food. But how many degrees of separate ...
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1answer
226 views

Does jam have the halacha of duchka d'sakina?

The Chochmas Adom in 49:9 holds that all fruit have the halacha of duchka d'sakina, and that if you cut a fruit with a meat knife which was not definitively clean, you need to scrape off the outer ...
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Which hechsheirim are reliable? [closed]

How can I find out which hechsheirim are reliable and which ones aren't?
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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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4answers
483 views

What qualifications are necessary to become a mashgiach?

I had thought that mashgochim (kosher kitchen supervisors) had to have semikkha or darn close. But people have been telling me that all you need to do is "know the laws" of kashrus, which they seem to ...
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128 views

Alcohol sales despite government monopoly

Many places have government imposed alcohol monopolies and private retailers of alcoholic beverages are forbidden. As alcohol, especially (red) wine, has a central place in Jewish practice and as ...
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52 views

If I left my kitchen under the control of someone who is a Gentile or not Shomer Shabbos, is it still kosher?

If I left my kitchen (or set of kosher dishes, etc.) with someone who is a) not Jewish or b) Jewish but not shomer Shabbos--in such a way that they could access it and hypothetically do anything they ...
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48 views

Do you have to check bagged lettuce with a hechsher?

I am aware of this question and of the CRC's lenient policy on lettuce without a hechsher. However, everywhere I've been, it is assumed that one needs to check (pre-washed, even triple-washed) bagged ...
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213 views

Frozen raspberries without supervision

My wife was told by a friend that a certain legitimate kashrus organization says that frozen raspberries do not require supervision, and upon calling the organization, she was told that the process ...
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2answers
190 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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Are potatoes considered a food that is fit for a king's table?

Are potatoes subject to the prohibition of בישול עכו״ם? Are they considered foods that are fit for a king's table? This story I found quite fascinating and I wonder if it has any bearing on this ...
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Do those who keep Cholov Yisroel eat products marked “K-DE”?

Some hechshers have the designation "DE" for "Dairy Equipment." Do those who keep Cholov Yisroel eat food with this designation? (I am mostly talking about the minority who consider [American] cholov ...
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72 views

Cold smoking and kashrut

related Cold smoking is a process by which food is cured by contact with smoke which fills the whole vessel but does not [ideally] exceed 80˚F, which is well below yad soledet (at least for my hands) ...
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How can I make my home kosher enough for ~most Jews to be guests in? [closed]

Let's say I wanted to set up a kitchen/home that was kosher enough for most of the Orthodox spectrum to feel comfortable eating and staying in. (By "most," let's say the first two standard deviations ...
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Japanese Ritz crackers and OU certification

In Japan there are some food products that are identical to American brands but with Japanese packaging. For example, here is the Japanese box for Ritz crackers: Ritz are certified kosher in ...
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Do roasted peanuts in their shells require a hechsher?

I know that non-Israel grown raw peanuts in their shell are considered plain "vegetables" / legumes and do not require kosher certification, as other untouched fresh fruit / veggies. Shelled peanuts ...
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What is the justification for not requiring “chalav Yisrael” cooking equipment for those who don't hold by R' Moshe's leniency?

As Shalom explained in his answer to a question about chalav Yisrael milk, R' Moshe Feinstein ruled that in countries where the local government regulations are sufficient to ensure that cow's milk is ...
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Cities' רבנו‏יות's accepting others' food

Years ago, IIRC, I heard the following from a respectable source: By Israeli law, if the רבנות of one city certifies a food as kosher, then the רבנות of any other city must allow that food as an ...
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Who holds that Cholov Yisroel is not a chumra?

Which groups or authorities consider Cholov Yisroel to be normative halacha and not a chumra? (Possibly equal to, "Who considers cholov stam treyf"?)
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Kashruth Issues with Dog Food?

If someone is keeping a vegetarian/milk household, and then they acquire a dog that eats meat based dog food products, what potential Kashruth issues might arise? Would there be difference in Kashruth ...
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1answer
47 views

Gardening produce - fertilizer with blood meal, kosher?

So as I'm getting ready to grow citrus trees and veggies, I went on the hunt for fertilizers (individual household, not a commercial farmer). I noticed that a whole lot of fertilizers use an ...
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82 views

How can one eat non-certified kosher Israeli produce?

In Israel, there are many stores that are not certified kosher that sell produce grown in Israel. What is the procedure for taking teruma and maaser, and is there anything else a buyer would need to ...
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31 views

Malibu coconut rum Kosher?

Anyone has an idea if malibu coconut rum is kosher?
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Can you use a not kosher knife sharpening stone/wheel [duplicate]

I learned the the sharpening stone kashers the knife But are there any sources regarding the use of a sharpening stone/wheel that was used for non kosher knifes (possibly used even when dirty knives)...
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Will parve item remain so within a fume-proof vessel heated inside a meat stove? [closed]

I'm laying out my kitchen for kosher and have decided to make my stove and oven all meat. I'll have a separate nook for cooking dairy. The problem is baking hallah. Normally that is a parve recipe. ...
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2answers
75 views

When does a kosher place need a mashgiach temidi?

I notice that some kosher places have a mashgiach (kashrut inspector) that vsists the place occasionally. Others have someone there permanently. What criteria is used to decide if a place needs a ...
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2answers
51 views

What dishware material is microwave safe and also kasherable?

I'm confused by some of the rabbinical advisory websites regarding what dishware can be kashered. Evidently glass and ceramic, the most convenient microwave safe materials, according to Askkenasi ...
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What is an effective separator for adjoining steel sinks divided into meat and dairy?

Chabad recommends: "...Separate sinks for washing dishes and preparing foods are recommended. If the two sinks are adjoining, there should be an effective separation between them so that no water or ...
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Is being vegan “kosher”?

Is being a vegan completely okay according to halacha? Even if a vegan is not eating anything traif (non-kosher), perhaps it's not truly correct because you are not following the commandments to ...
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2answers
554 views

Should I run meat towels and dairy towels in different laundry loads?

In part of learning to keep a kosher home, I understand I need to keep two sets of kitchen towels, tablecloths, etc. How do I maintain these items in a kosher state? Should the towels be run through ...
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Davar charifs and chometz

"Davar charif" is a term in kashrus which refers, as I understand it, to sharp or caustic foods which may absorb flavor from a knife used to cut them, rendering them, say, fleishig if the knife is ...
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What is the basis for eating in someone's house without a kashrut certificate?

No one asks for a kashrut certificate to eat in someone's house; they just make a rough judgement based on the host's reputation (the way they dress or behave, the circles they move in, etc.). That ...
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Does fish need to be inspected for non kosher fish, flies and worms?

I'm not sure if commercial fish is inspected in any way. I know that most commercial fish is caught in nets, so I don't think that bait is used. When individuals go fishing, they use worms, flies, or ...
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Can a Jew follow another religion's dietary laws?

Suppose another religion has dietary laws that overlap with those of Judaism. For example, Zoroastrianism prohibits eating all land animals and prohibits eating various kinds of fish and other sea ...
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2answers
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What does the term “glatt kosher” mean, today?

A mashgiach explained to me that the term "glatt kosher" means that the lungs of cattle and sheep (the 2 main kosher animals sold in U.S.) are smooth and do not have air pockets. I hope that I have ...
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640 views

Kashrut of rennet for cheese & Difference between rennet and gelatin

I actually have 2 questions which are related. Traditionally, making cheese involves using rennet, a substance derived from animal stomach. If the rennet is derived from a non-Kosher animal, it is ...
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1answer
75 views

Is checking for bugs halachically required?

Various methods of checking for bugs in produce, i.e., lettuce, are officially recommended by kashrus agencies and other halachic professionals. However, is use of one/any of these methods--or even a ...
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Is the use of the term “Glatt Kosher” a case of “Genivat Da'at”?

My understanding of the term "Glatt kosher" which I heard from 3 different mashgichim (kashrut supervisors) The term "glatt" means "smooth" and applies only to beef and lamb. (I would assume that it ...
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607 views

Keeping Kosher and Leather

I would like to ask a question regarding something I am quite confused by. Why is it okay to wear leather from an animal slaughtered not in a kosher fashion yet you cannot eat that animal's meat? To ...
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Reliability of the OKS

I dont know if this type of question is allowed but I was told to ask it here The symbol is on some restaurants in the NY tri-state area (like Crumbs Bake Shop for example) and I have heard of quite ...
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400 views

Would coffee in beer be kosher?

It is common practice to allow drinking coffee pretty much anywhere. It is also widely accepted to drink unflavored beers. Would that logic allow one to drink beer that is commercially brewed and/or ...
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Koshering canning jars

If someone cans using Ball brand glass canning jars (and new lids are used every time, so nothing to worry about with those), In the normal canning process, the jars are boiled to sterilize them prior ...