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

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Kashrut of Bread

Assuming bread was prepared and baked by a Gentile using only kosher ingredients (e.g. kosher flour, water and kosher yeast) and only kosher equipment, what conditions would render such bread fit for ...
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Halachos of kashruth and bliya

If a utensil can't become meat or milk through bliya, (like wood) then is it ever possible to become non-kosher?
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Making a bracha on kosher ingredients cooked in non-kosher pots?

Is it assur to make a bracha on foods whose ingredients are kosher but cooked in non-kosher utensils? What is the source?
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Using a non-kosher rotating pizza oven

A countertop rotating pizza oven has a turntable on which pizza is placed. It has two heating elements: one heats from below the turntable, like a hot plate. A heating element above broils a section ...
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Cloth and meat and milk

Does cloth retain meat and milk after it is washed? I was thinking that instead of ceramic or plastic plates, we could eat off of woven disks.
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plastic utensil absorption and kashering

Does a plastic utensil swallow up taste and excrete it out like metal,or is it like glass. Also can plastic be kashered if it became treif? What are the sources that discuss this?
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Is kosher food cooked by an irreligious Jew Bishul Akum?

Assuming that one can ascertain that food cooked by an irreligious Jew is kosher, is the food still prohibited due to Bishul Akum? Does this also apply in a case of need, such as one visiting an ...
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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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koshering a keli less than 212 farenheit [closed]

my wife made Hagala in a vessel and the water was not boiling yet. I measure the temperature after she did it and it was 80 degrees celsius (176 F). whats the din now. can i used or i have to kasher ...
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243 views

Do I have to check my fruits and vegetables [for insects] before I put them in a smoothie?

I use both frozen and fresh fruits and vegetables in my smoothies, and mostly organic. Does the type of fruit or vegetable matter? For example, produce that generally has more insects, such as ...
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Kashrut--idol in restaraunt

A popular restaraunt here in Yerushalayim has a small idol on its cash register. Every paying customer will see it. The staff will answer your questions about it, and recommend reading. Its' ...
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Why keep Kashrut?

Is there a known reason for keeping kashrut or is it a set of guidelines proposed by sages who we respect and don't question the logic behind? Is there anything in the Torah that suggests kashrut?
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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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Family Event at non-kosher resturant

One of my family members is having a family event at a non-kosher restaurant. I want to be there because it is a very important occasion and I don't want to insult my family. However, I know that in ...
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What is “reverse certification”

I got this in a daily halacha email but not sure what Reverse Certification means, I figure someone here does Reverse Certification It is permitted for a mashgiach to enter a non-kosher ...
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160 views

What are all the different koshers for/about?

I found out recently that what I had been thinking of as a "food copyright symbol", (U), is actually a statement of kosherness. Now that I know what this is, I'm starting to see different symbols like ...
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Kosher Coconut Oil Packed in Non-Kosher facility [duplicate]

If the Coconut Oil is Kosher but is packed in non-Kosher facility, is it still kosher?
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Kosher shops selling turkeys

I have noticed a Kosher shop selling turkeys only at this time of the year (...late December). Without getting into a discussion about the Kashrut status of turkeys, is this considered in the spirit ...
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Scraping fish with a finger nail?

I heard that a kosher type fish bought from a grocer that has also non-kosher fish, that scraping it with a finger nail where the blade cut makes it good to eat. What is the source for this idea?
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What do we do with Chazaka's that don't seem to hold?

Inspired by this comment, there are Chazaka's (presumptions) and principles of נאמנות (trustworthiness) in Halacha that no longer hold in our practical experience. One example is עד אחד נאמנן ...
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Pouring honey into a hot beverage

Can pouring honey into a hot beverage, such as tea, create a Kashruth concern? In particular, if you pour honey into hot tea with milk, can you later use the same bottle of honey to add honey to a ...
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What Kashrut Agency Uses this Symbol?

I found this symbol on a box of chocolates today: It was on a box of chocolates from this company - http://www.hauserchocolates.com. Anybody recognize the agency?
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The Sciatic Nerve and Fat of Kosher Fowl

I have learned that the sciatic nerve must be removed from land animals to render the meat kosher. But what about fowl? Does the sciatic nerve need to be removed from chicken or turkey? Why or why ...
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Dairy hechsher but no dairy ingredients listed [duplicate]

Suppose that a food product has a dairy hechsher (say, OU-D) but does not have anything obviously dairy in the ingredients list, and does not have "contains dairy" or something similar written below ...
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Can you eat cheese with bread-that-was-cut-with-a-meat knife?

If you intentionally cut bread slices with a meat knife, can you then eat that slice of bread with dairy products?
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118 views

Can bleach be sufficient to cleanse for Passover?

A couple years ago I (Conservative) was asked by my wife (Baptist) to educate her church by running a Seder for them. I cleaned the kitchen and serving areas as best I could, vacuumed the carpets, ...
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Can you eat beeswax?

To my knowledge there is a lengthy discussion as to why bee honey is kosher to eat. I am unaware of any discussion of bee wax. I am told by my local grocer that many large distributors of produce coat ...
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176 views

If we don't cook a calf in its mothers' milk, why can we use eggs with chicken?

The Torah says that one should not cook a calf in its mothers' milk. This is the basis for the prohibition of eating milk and meat together. If this is the case, why is it not also illegal to cook a ...
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Can a deep-cover agent on active assignment violate kashrut to blend in with targets?

I have no idea whatever what the Mossad's practices are when collecting human intelligence, but I would be certain a small percentage of people in CIA would have to be Jewish owing to ...
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Bishul Akum for Sefardim

There is a difference of opinion among sefardi and ashkenazi poskim regarding bishul akum. For ashkenazim it is enough if a Jew lights the oven and a non-Jew cooks the meat. For sefardim, a Jew must ...
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Kashrus of Pepperidge Farm Goldfish

Ok, this is a little lighthearted but so be it. I am curious why I can't find the answer to this online. I was once told by someone involved with a nationwide kashrus organization that Pepperidge ...
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What to do when finding blood in eggs

When cooking something with eggs, I always check the eggs for bloodspots. But I wonder, if I find a blood spot, do I need to throw the whole egg away or can I take the blood out with a spoon and use ...
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Limited nature of products considered kosher

I was reading about the laws of bitul, though I've never learnt about them properly in any detail. One example given in the book (An Artscroll book on kashrut) was that you can assume that a grocery ...
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Rav Moshe milk and tuna

Rav Moshe holds that tuna needs a masgiach timidi for it to be consumed,every fish needs to be checked for the simanim.However, by milk he brings a savarah that the government is sufficient and a ...
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Allowed to help prepare / serve “milk and meat” meal in homeless shelter?

Imagine a case in which one is invited to volunteer with a group that is preparing and serving a meal at a homeless shelter. The group has decided on a menu that includes milk and meat together in ...
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Halachic law about inviting a Jew for dinner by a Gentile

I know that Observant Jews are commanded by law to eat Kashrut or kosher, so can I as a Gentile invite my Jewish friend for dinner, for example at a marriage or engagement party? What food items ...
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In light of modern science, why is bee honey still kosher?

My understanding of why bee honey is kosher is because the talmud says that the honey is not a by-product of the bees. They simply store the nectar in their body to transfer it and then expel it, ...
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How come delicatessen offer meat sandwiches AND cheesecakes as deserts?

How come delicatessen offer meat sandwiches AND cheesecakes as deserts? Were people mixing meat & dairy in eastern european communities ? Or were they not really part of traditional ashkenazi food ...
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Must a non-Jew who eats trief or a nevaila immerse himself?

Vayikra 17:15: And any person, whether a native or a stranger (gair), who eats carrion (nevaila) or what was torn (trief), shall immerse his garments and immerse himself in the waters, and shall ...
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Refrigerators and shabbat

I have a friend that became Habad a while ago, and lives with her non-orthodox parents. She leaves the house for shabbat, but insists that her parents turn the lights off in the fridge, because if ...
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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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Is a chicken egg considered “Aver min Hachai”?

The question of Chicken eggs and why they are Pareve and not Meat has already been addressed. My question is why are they not considered "part of a live animal" and therefore prohibited to eat to Jews ...
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can frozen yogurt be OK without storefront certification?

It's increasingly common for frozen yogurt chains to have their central production plants be certified kosher. Examples include Pinkberry, Red Mango, and Yogurtland. When this is the case, are there ...
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Do hechshered leafy vegetables mean that they have no bugs?

If I buy (for example) frozen broccoli in the store with a hechsher, is it required to check for bugs? Does the hechsher signify that the vegetables have already been checked for bugs and are free of ...
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If the label says O-U D, but the warning label for allery 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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Do Hashgachos endorse non-proximate halachic claims on label? [duplicate]

Sometimes I find products (under Hashgacha) with halachic information written on the wrapper (away from the hechsher). For example: Some products claim "Pas Yisrael", "Chalav Yisrael" or "Yashan". ...
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Does Vegan Certification Have Any Halachic Weight?

There are a number of organizations that offer Vegan Certification for food products; the concept is the same as kosher certification, (though that is the only similarity). Examples would be Vegan.org ...
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Hechsher on Trans Fat

The National Academy of Sciences (...) has concluded there is no safe level of trans fat consumption. There is no adequate level, recommended daily amount or tolerable upper limit for trans fats. ...
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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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What is the kashrut status of synthetic/in vitro meat? [duplicate]

It was reported in the news today (at least in the UK) that another step forward has been made towards the creation of "synthetic meat". From BBC News: The world's first lab-grown burger was ...