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

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Using Dishwashers for both Meat and Milk

Can one use a dishwasher to wash both meat and dairy dishes, either simultaneously or consecutively? What about pareve dishes?
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Were flour tortillas invented by the Jews of New Spain?

I was reading the Wikipedia entry for tortilla. It says, The wheat flour tortilla was an innovation by exiled Spanish Jews who did not consider corn meal to be kosher, using wheat brought from ...
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Does extra virgin organic coconut oil have to have a hechsher?

I am specifically referring to Coconut Oil. I know that my question is similar to this one: Is Extra virgin olive oil kosher by default? but My question is also about non-olive oils. Due to the huge ...
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Can olives infected with worms from the olive fly be used for making olive oil

Here, in Portugal they produce olive oil from olives that contain worms (from the olive fly). In our harvest we see an infection that is above the 80%. We spoke with locals in the area and they told ...
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How to respond to “but he does”

I mentioned to my coworker that I can't eat Domino's pizza, not even without meat, as it's not kosher. He pointed out in response that a fellow coworker of ours, whom I'll call Josh, and who is ...
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Do you have to check boiled eggs?

Is it necessary to check hard or soft boiled eggs for blood spots? I've never seen anyone do it, so perhaps it is not, but if so, why?
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If the label says OU-D, but the warning label for allergy sufferers says “no dairy”, do we consider the product dairy or not?

I attended a fantastic lecture on kashrus and dairy products by Rabbi Zushe Yosef Blech, shlita, who was asked an interesting question: Can you eat Oreo cookies after a fleishig meal? It was pointed ...
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Kashrut of Kellog's cereal

The cRc recommends Kellogg's cereals with only a k on the box. In my experience, I have not heard of anybody who disagrees with this. This is an unusual situation, though, since normally a plain k ...
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Why doesn't Kellogg's print the symbol of their certifying agency on their boxes

I have separated my previous question about Kellogg's cereals into different posts based on the comments on that question. The cRc recommends Kellogg's cereals with only a k on the box. In my ...
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After a kosher shekita, a non-kosher animal (cat) has eaten from the carcass. Is the carcass still kosher?

After a kosher shekita, a non-kosher animal (cat) has eaten from the carcass. Is the carcass still kosher? (The question describes not a real problem, I am just curious. In the reality, I've never ...
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Kosher nicotine replacement therapy?

I've tried to quit nicotine cold turkey and find it difficult. Are there any replacement therapies -- such as nicotine gum or lozenges -- that are kosher? Aside from possible kashrut issues, are ...
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Would a non-kosher Earth animal born in space be kosher?

Inspired by this question. The question linked quotes Sanhedrin 59b in saying that if an animal came down from heaven (whether it had kosher signs or not) it would be kosher. If I were, however, to ...
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Buying pre-cut ginger

May one use ginger root that is sold pre-cut? For context, I am curious about how the rules of davar charif might apply here. It seems to me that ginger would be a davar charif, so if it is cut with ...
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1answer
102 views

What are the characteristics of a kosher flour sifter?

there are flour sieves that are sold with rabbinical approval. You can see one here: http://cdn.instructables.com/FQ7/UKPN/FI8VJOBL/FQ7UKPNFI8VJOBL.LARGE.jpg What are the requirements for a kosher ...
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53 views

Using crockpot for a soap making project? [closed]

Preamble to my question: I was told by someone at Star-K that since soap is not food, it really doesn't even need a hechsher. For example, he told me that even though Brillo pads are not kosher, it ...
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2answers
154 views

Can a secular Jew drink non mevushal wine that he touched?

If a secular (non-observant) Jew touches wine that isn't mevushal does that render it not kosher for him to drink? Nafka Mina: gifting non-mevushal wine to a secular friend.
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Does non mevushal wine make the vessels containing it treif?

As per halacha and many other questions here, non-Jews touching (etc.) non mevushal wine can cause the wine to become non kosher. Does this have any effect of the vessels holding the wine, kashrut-...
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If all ingredients are kosher, is the entire dish kosher?

I am working on an app that allows users to enter in recipes. I have access to some data about certain ingredients that the user can select for the recipe, such as if the ingredient is kosher. If all ...
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Does a rubber sink stopper transfer kosher status?

We rent a place with stainless steel sinks I kashered last Pesach to be fleishig but there are rubber sink stoppers all I could do was clean until they were clear of food particles. The people who ...
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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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1answer
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Is vodka made from whey kosher?

There is a new vodka which is made from a whey base. I was wondering what are the halachic considerations,chalav akum is one that comes to mind,as well as basar bchalav?
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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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Could a Ben Pekuah make all cattle not eligible for Shechitah?

According to the Simlah Chadashah, the definitive work on Shechitah, a Ben Pekuah does not need Shechitah on a Torah level however the child of a Ben Pekuah and regular animal would not be eligible ...
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Is it kosher to eat live fish

In some countries people like to eat animals that are still alive (e.g. dancing squid / octopus). Clearly these animals are not kosher, but it is also possible to eat kosher-types fish that are either ...
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Is non-kosher-dyed food kosher?

Supoose some non-slaughtered-animal or non-kosher-species ingredient gets mixed accidentally into a larger food. From what I understand, if the non-kosher ingredient is not thought to add flavor to ...
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KORC - Kosher Symbol

I was in Costco today and saw chopped romaine lettuce with the KORC symbol. I was wondering if anyone knows if this symbol is accepted by the OU or other large Kashrus organizations.
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Source for requirement of 3rd party hechsher? [duplicate]

When you eat another Jew's food, you are entitled to rely on him for the kashrus of the food. By that reasoning, if he opens a restaurant, and you know him to be Yarei Shamayim, you shouldn't need ...
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Is there a problem with eating Gummy Bears and Meat together?

Most kosher gummy bears (and other gummy candy) that I have seen contain fish gelatin. Since there is a warning in the Shulchan Aruch against eating fish and meat together, does the same apply to ...
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Can a Jew borrow a cup of sugar from his non-Jewish neighbor?

I'm not specifically asking about stealing and owing concerns, although those may also be of interest. My question is actually: Can we use kosher-labeled ingredients from a non-Jew's home? (I ...
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Is a bottle or jug of 100% pure maple syrup kosher without certification?

There are several farmers' markets scattered around the New York City area. Many of them carry bottles or jugs of 100% NY State or Vermont maple syrup. Occasionally I find Canadian maple syrup. (For ...
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Is it against Kosher law to combine poultry and cheese? [duplicate]

As I understand it, the prohibition on mixing meat with cheese is based on the commandment against "seething a kid in its mother's milk". Since poultry are birds, and birds don't produce milk, is it ...
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10 second rule for food on ground [duplicate]

Throughout the secular world I've heard the expression "10 second rule" whenever a piece of food has fallen to the ground (and someone still wants to eat it). The 10 second rule permits the food to ...
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Can a Jew work in non-kosher food warehouse?

Can a Jew work in non-kosher food warehouse? I mean to lift boxes from one place to another, to load pallets filled with boxes of non-kosher stuff. My question is about specific warehouse where there ...
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any point to avoiding meat and shellfish at non-kosher restaurants?

Some Jews have a practice of keeping kosher at home but eating at non-kosher restaurants, where they will be sure to avoid ordering meat or shellfish. Is there any "point" to this from a halachic ...
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Can non-biological matter cause your sink, dishes, or food to become non-kosher?

For instance, if something non-edible such as a chemical or eraser shavings are drained down the sink, would that cause any kashrut problems?
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Is Red Bull™ kosher?

Is the Red Bull™ energy drink kosher?
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Do Whole Vanilla Beans Need A Hekhsher?

Vanilla beans and their derivatives are commonly used in many dishes as a spice. The whole beans are available for purchase in stores and online. I understand that plain fruits and vegetables (when ...
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Ben Noach give a non-religious ben Yisrael non-kosher food?

If a ben Noach invites a non-religious ben Yisrael to his home for Torah study(let's say they study the seven laws of Noach together) and the ben Yisrael gets hungry, and he's going to not eat kosher ...
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Is there a concern regarding the kashrut of microorganisms?

Since I have seen many religious people drink fresh spring water, I assume that there is no concern regarding the kashrut of microorganisms in the water such as hydra and paramecia, among other ...
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Questions about eating Kosher

Is the main considerations on what meat is Kosher made public in Leviticus 11 or is there other Jewish sources that may give further illumination on what food is considered kosher? Also is there ...
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Can one Shecht with a Wire

Can one ritually slaughter with a wire? Why or why not? The Talmud says that any implement may be used, so according to that a wire would be fine. Are there any technical problems that would ...
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Why were birds considered to be flieishig (meat) but not fish?

I am basing this on what I had heard in yeshiva a while ago, so I don't know the exact source of the reasoning. My understanding is that according to the Torah, birds (poultry) were considered parve ...
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Can a Jewish actor participate in a pie-throwing scene that uses non-kosher pies?

For those younger readers who may be unfamiliar, (call me an "A.K." if you wish) pie throwing was a common comedic scene and activity in several movies and T.V. skits such as The 3 Stooges (nyuk nyuk)....
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Are “Kosher Salts” Kosher?

Is "Kosher salt" supposed to be understood as certain salts that adhere to the Jewish religions dietary restrictions? I'm curious if this is so what about salt can make it kosher or non kosher?
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Should a Va'ad revoke kosher certification of caterers that allow catering a gay marraige affair? [duplicate]

Related and a follow up to this M.Y. question: The U.S. Supreme Court has legalized gay marriages in al states. There have been several publicized law suits in a few states where a gay couple sued a ...
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Batel b'shisim on a large scale

Suppose someone is making a huge 50-gallon vat of cholent. Accidentally, an entire bag of milk breaks and spills into the cholent. There is more than 60x as much meat cholent as there is milk, so the ...
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Are these cookies kosher?

These cookies have no certification on the box itself, it is made in a spanish speaking country. yet they have a sticker with a kosher certification put on them. is this reliable? This is not a ...
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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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Is it permitted to eat boogers?

I apologize for the question. but is it permitted to eat ones boogers? possibility of blood? is it Baal Teshakzu? totally permitted similar to nail biting? and would it be forbidden on shabbos?