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

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The Manna and non kosher taste

The Gemarah in Yoma 75a explains that the manna imparted all flavors except five flavors. Based on this idea, can one have in mind the taste of pork while eating the manna, or do we say that anything ...
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Is Guinness Beer no longer kosher?

A new Smithsonian article has discovered Guinness Beer's use of isinglass, a technique that Guinness Beer has confirmed that it does to the Huffington Post, and even declared "Guinness Black Lager is ...
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435 views

Using a non-kosher toaster oven

What is the permissible way to use a non-kosher toaster oven? My thought process was that, when cooking milk in a meat oven, the covering of the dish and the rack makes it acceptable. Would covering ...
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Can my non-Jewish co-worker bring me coffee from the corner cafe?

Assuming coffee is Kosher, would it be alright if my non-Jewish co-worker brings me coffee on a trip to the corner cafe? May I assume that the co-worker indeed purchased a Kosher item and has not ...
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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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What makes a wine kosher?

Why are some wines kosher and some not?
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At what point was it recommended to have a separate kosher certifier (mashgiach) for local Jewish businesses?

If I understand correctly, you can generally walk into an observant Jew's house (upon invitation) and if he says the food is kosher, you assume the food is kosher. Now if the same fellow has a kosher ...
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540 views

Koshering granite

I have been told that a granite counter top is similar to glass in that it is not porous and does not absorb taste from food that touches it. Is there a source in halacha for this concept? What other ...
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Opened “please-take!” food items in a non-Jewish workplace

Is it alright to consume unsupervised food items at work that are open and available to anyone, assuming the items were initially known to be Kosher1 and there's no evidence of tampering? Items that ...
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How to explain Kashruth simply

How can one explain Kashruth to a curious colleague without too much complexity? I get curious questions all the time, mostly about the laws and about rabbis blessing the food, which is, of course, a ...
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Can jews eat unclean animals when blood is removed?

http://www.mechon-mamre.org/p/pt/pt0512.htm Notwithstanding thou mayest kill and eat flesh within all thy gates, after all the desire of thy soul, according to the blessing of the LORD thy God ...
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What makes something “worthy of being honored”?

When a piece of meat is in a mixture that should nullify it, we don't consider it nullified if it is ראוי להתכבד, or "worthy of being honored", something you would serve to a guest. Is there some kind ...
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Efshar LeSoḥato Asur - because or even though?

I'm trying to comprehend the concept of "אפשר לסוחטו אסור" (roughly: "if it's possible to extract it - something prohibited from something otherwise permitted - it is prohibited"). As far as I can ...
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549 views

In what way is kosher chicken different from brined chicken?

Over on Seasoned Advice, there have been a number of questions related to the nature of kosher meat and the amount of salt absorbed by the meat. Most recently, In what way is kosher chicken different ...
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189 views

How does Kavush work?

The Halachic principle of Kavush states that leaving something in liquid for 24 hrs transfers taste, and therefore it alters the status of the thing with which it is exchanging tastes. However, ...
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81 views

Waiting to reveal Kosher issue in order to get to the root of the problem

Suppose a Mashgiach realizes that a store is selling Treif meat, however is unsure as to the source of the problem. If he announces immediately that this store is selling something not Kosher he may ...
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125 views

One-in-Sixty Versus Roiv- Why both?

There are two concepts in the Halacha of Bittul (nullification). One says that if there is an item that is Unkosher that falls into another item that is Kosher, and it is a mixture, and the Unkosher ...
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Which rabbis permit food being kosher just based on the ingredients?

Kosherstarbucks.com give options of what to order based on different halakhic standards. They include the "No Utensils List" (CRC-recommended), the Regular list, and the Kosher by Ingredients list ...
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Sharpening a knife as Ne'itzah/Kelipah

Can sharpening a knife be done as a form of Ne'itzah for removing a Kelipah for Kashruth concerns?
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Sharpening a knife as N"T [duplicate]

Is sharpening a knife a concern of Nothein Ta'am in Kashruth matters?
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222 views

Status of plastic drip coffee filter cone

What would be the status of the coffee maker cone shown below if it were to be used to make a cup of coffee in a dairy mug? Would it become dairy? Would it remain parve? Here's how it works. It ...
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1answer
115 views

Jewish Person Selling Non-Kosher Product

At a local convenience store near my work, they stock all sorts of non-Kosher products. However at the cashier's desk is a guy obviously orthodox Jewish (Curls down from the side, Black Clothing ...
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193 views

Eating treif under hashgacha

What happens if someone eats at a restaurant with a kosher certification (hashgacha) but is served, and unknowingly eat non-kosher? What are the spiritual and halachic ramifications to all parties ...
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Is being vegan “kosher”?

Is being a vegan completely following halacha? Even if not eating anything traif (non-kosher), perhaps it's not truly kosher because you are not following the commandments to domesticate animals and ...
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Are preservatives called a “davar ha'mamid”

At the end of YD Siman 87 we find the dinim of "mamid". Over there it's speaking about cheese made in the skin of the kevah of a nevilah of treifah. The Rema explains that because it is an issur for ...
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what is kosher meat?

I have heard different theories about Kosher foods, such as They sacrifice animal in a proper way They recite God's name when sacrificing the animal They only eat front limbs of animals. The rear ...
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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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235 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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Halachic Considerations for Women in the IDF

For a religious girl going into the IDF very soon, there are a few questions that are often asked: Especially in active units, wearing a skirt while on base can be a problem: While crawling, ...
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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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701 views

Is it permissible to use a Hotel's Drinking Glasses?

Is one allowed to use the glass cups provided by a hotel (usually in the bathroom) for drinking? Or is there a Kashrus problem?
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140 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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479 views

Is Pork, Camel, and the like Fleishig?

If one somehow consumed meat of a non-kosher species such as camel or pork (e.g. life-threatening illness, or by accident), does s/he become Fleishig? Why or why not?
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Kashrus status of turkeys

From what I have heard there were those that did not eat turkey (such as Rabbi Yaakov Kamenetzky Zatzal) due to a question whether we have a Mesorah as to the Kashrus of this bird. I know that many ...
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Why aren't Yemenites an ed echad on locusts?

I've heard that the reason we (most of us) don't eat the locusts enumerated as kosher in the Torah is that we cannot identify them. That is, we don't know what type of locust is referred to by the ...
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1answer
288 views

How does one keep a kosher sink?

How does one keep a sink kosher when using two separate sets of plates and dishes?
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Trustworthiness of “new” dishes

When one buys new dishes from a store (e.g. cutlery, plates, bowls), is there any concern that they are not as "new" as they are claimed to be? For example, someone buys some cutlery and plates, ...
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184 views

How to identify Yashan

I would like to serve food to a friend who observes the restrictions against eating Chadash grain products, but I don't have access to a guide on identifying Yashan. However I have heard, for ...
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Dried insects - permissible?

I just read the website of a Kashrut inspection agency with which I'm familiar, but only insofar as I have seen it many times and tried, but failed, to find any information about the agency's ...
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Kashrut: Meat and dairy

My family owns a farm that produces fresh food, including dairy and meat. Would the prohibition to eat milk and meat together still apply since I have ascertained that the cow from which milk was ...
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Why is Kosher important?

Why is Kosher important to Jewish people? It is not necessarily healthy food from what I can see.
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Can Jews eat non-Kosher meat?

Is it permissible for a Jew to eat meat that isn't treif or forbidden flesh if it was not purchased from a kosher butchery? I was told by a Muslim friend of mine that non-halaal meat (except pork) ...
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Does a Chalav Yisroel milk bottle help?

There are many stores out there (e.g. Coffee shops) that have a hechsher, but are Chalav Stam. To get around this issue, some of these stores offer the option to request Chalav Yisroel milk for those ...
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322 views

Food cooked by a non-Jew not kosher?

Why is it that food cooked totally by a non-Jew - without the participation of a Jew - is not kosher?
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Why assume coffee is kosher

Why can it be assumed that coffee from coffee shops is kosher? Why couldn't the equipment become unkosher through exposure to non kosher ingredients or when being cleaned? For example the Canadian ...
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380 views

Is human flesh a kosher food?

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

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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648 views

Keeping Kosher at a secular company

How you do deal with keeping Kosher while working at a secular company? Its easy enough to bring my own lunch everyday, what I'm not sure how to handle are events like company lunches and other social ...
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Comprehensive list of Kosher Products

Is there a comprehensive list on the web of all kosher products?
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A site to search Kosher Symbols by characteristics?

Several years ago, I found a website that let me search and sort Kosher symbols by look and other characteristics. It seemed like each symbol was tagged with its distinctive features. This was very ...