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

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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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1answer
188 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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Untoiveled but used dinnerware and cookware - how to salvage if possible? [duplicate]

What's the deal with untoiveled, but used, dinnerware and cookware? Can they still be toiveled to make usable/kosher or must it all be tossed?
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1answer
50 views

Drinking coffee using non-kosher utensils

Is there a legitimate heter for drinking coffee from a coffee cup that would most likely have been washed with non-kosher utensils? I have seen people be lenient in this respect, but don't know why.
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3answers
160 views

What are the kashrut issues with kosher food at a non-kosher restaurant?

What are the major kashrus/halachic issues with going to a non-kosher restaurant and ordering, say, [kosher fish] and vegetables; dressed with only extra-virgin olive oil, salt and pepper; ...
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4answers
593 views

Can you buy a beggar non-Kosher food, or chometz on Pesach?

If I am asked for money by a beggar on the street, or see a homeless person with a sign, I try and give them food as it is usually more useful than money (which will probably be used for alcohol or ...
3
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1answer
25 views

What are the alternate signs for a kosher fish?

In addition to the signs for a kosher fish mentioned in the Torah, The Tur (Y.D. 83) brings alternate kosher signs for fish that are not accepted by all Poskim. Namely, the head of a kosher fish is ...
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1answer
112 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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4answers
1k views

Starburst Fruit Chews kosher?

Are Starburst Fruit Chews kosher? This website below clearly has an OU on the right side. However, Gelatin appears on the ingredient list, and the oukosher.org website doesn't have any reference to ...
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3answers
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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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5answers
544 views
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262 views

Non-kosher, non-Jewish-run, Sushi Restaurants

Is the food served at a non-kosher, non-Jewish run sushi restaurant considered non-kosher because of the non-kosher-ness of the knives, the bishul akum of the rice, or both?
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4answers
133 views

Where in the sources do we find a list of kosher birds?

In the parsha this past week (re'eh) we find a list of birds that are not kosher. This is unlike the Torah's approach to mammals and fish, where we are told to identify those that are permitted by ...
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4answers
215 views

Comprehensive list of Kosher Products

Is there a comprehensive list on the web of all kosher products?
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0answers
84 views

If you check for bugs according to halachic requirements, and then there is a bug in the food, are you liable?

If one or one's wife does everything that is needed for checking, but one accidentally eats a bug anyway, is one liable for the sin(s)? I'd also be interested in knowing whether one would be liable ...
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5answers
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Are sea sponges kosher?

The sea sponge is scientifically classified as an animal, therefore maybe it would be considered unkosher, as seafood. On the other hand, it seems much more similar to a vegetable of some kind, so ...
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Why do soft cheeses made by gentiles, like cottage cheese, have a hechsher, while others like mozzarella not have a hechsher?

I noticed Rav Abadi says all soft cheeses made by gentiles are kosher. Do other poskim also hold like him? If yes please post who. Both cottage cheese and mozzarella require rennet, so I'm not ...
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1answer
64 views

Is a klipa davuk?

There are many places in the realm of kashrut where something may become forbidden kedei klipa (just the edge is asur). For those who hold by isur davuk (as isur which is attached to something else - ...
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1answer
130 views

How much aged cheese is needed in a cheese mix to require waiting 6 hours?

According to Remo in Shulchan Aruch Yorah De'ah a9:2 as referred in this OU article, people should wait 6 hours after eating hard cheese. Let's say someone eats a type of cheese that is partially ...
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25 views

kasher a nonkosher Le Creuset pot? [closed]

I have several Le Creuset pieces - Dutch ovens and casseroles - that I inherited. They have not been used for 15 years, but definitely were used for non-kosher cooking; it's safe to assume they might ...
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1answer
41 views

Identity of Star-of-David kosher symbol

What is the certifying agency that uses a kosher symbol comprised of a Star-of-David containing another odd-looking symbol within it?: It is carried by, e.g., Byrne Dairy milks (of New York ...
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0answers
36 views

Can non-food be treyf?

If I placed my kosher food on a non-kashered surface that I knew had never been used for food, is my food still kosher? I would be interested in whether there could be concerns of bugs--but that is ...
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1answer
95 views

Are GMOs Kosher?

Currently taking a biology class in which genetically modified foods were discussed. Some of the plants had DNA from non kosher animals added into the plant genes. How does this impact the kashrus of ...
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2answers
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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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0answers
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One Dishwasher for Milk and Meat Dishes [duplicate]

Can a dishwasher be used for both meat and milk dishes? Under what conditions? As far as I can tell it should be OK right afterwards since any taam would be lifgam because the dishes are covered in ...
3
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2answers
184 views

Can you french kiss your wife if she does not eat Kosher?

Is there any kashrut problem to kiss your wife if she has eaten something non-kosher? Maybe you can eat small non-kosher food by kissing her. If her whole mouth is not kosher due to the hot ...
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0answers
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Public Transit on Shabbos [duplicate]

Can I take the bus on shabbos? Theoretically, since the bus doesn't stop for just you, it seems possible. I want to take the Bx7 to Riverdale on Shabbos, but it crosses over a river en route, meaning ...
5
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1answer
251 views

Is one allowed to have his child take a non-kosher oral vaccine if the law requires it to attend school?

Many state laws require that toddlers be vaccinated prior to attending elementary school. Years ago, the Sabin Polio oral vaccine was used. I'm uncertain if oral vaccines are used, now. Let's say ...
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1answer
204 views

does a water bottle become fleishig from a meal?

If I drank from a water bottle during a meat meal, does it become meat? Basically, if I drink from the same water bottle a few hours later, do I need to wait six hours again?
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1answer
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Does the one-year rule regarding Milchig and Fleishig pots apply to non-Kosher vessels?

According to Ashkenazi tradition, "If a meat/milk pot hasn't been used for a year+, it may be used as the other type without Kashering". If I have a ceramic coffee mug that may or may not have ...
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1answer
49 views

Are songbirds Kosher?

In Leviticus and Deuteronomy, there are sections that give a seemingly comprehensive list of non-Kosher birds. They are mainly birds of prey, not songbirds or birds like that. I know that there is no ...
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1answer
819 views

Why does medical marijuana need a kosher supervision?

Today, NY State joined several others in opening clinics to dispense medical marijuana. Distribution of this is restricted to patients who have severe illnesses such as Parkinson's Disease, epilepsy, ...
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Does Lubavitch Messianism pose a Kashruth problem? [duplicate]

This is a practical question for Kashruth, but there are multiple issues that play into it. Firstly do members of the Lubavitch community have heretical beliefs? Some prominent Lubavitchers have made ...
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1answer
61 views

Contemporary leniencies regarding the prohibition(s) of new grain

Since Talmudic times, Rabbinic scholars have grappled with the apparent contradiction between the Biblical and/or Rabbinic prohibition(s) of chodosh (new grain grown since Passover) and the common ...
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6answers
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Is there a problem with Triangle K? If so, what?

I want to know what the OU's or any other Orthodox kashrut agency's problem is with Triangle K. I have read about the Ralbag family which founded and runs the Triangle K and they are clearly Orthodox. ...
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1answer
101 views

Is weed kosher? [duplicate]

Some says that qnei boshem in the bible, one of the ingredient of holy anointing oil is a plural form of qneibos or cannabis. Ganja. Whether that's true or not, I sort of wonder. Is it kosher? It's ...
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2answers
140 views

Kashrut - Why is Halal label on Kosher meat? [closed]

I have noticed that Of Tov has Halal listed on their meat products. How is this halakhically possible? The Quran teaches that Kosher meat is not permissible for Muslims only grain is permissible. How ...
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2answers
84 views

Does anyone know about a recent brocolli bug problem?

I'm not sure if this is a recent localized problem or not. A few people in my neighborhood (New York City area) have told me that local Rabbinical councils have forbidden buying broccoli, as there is ...
4
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1answer
178 views

Can a non-Kashrus observant Jew cook for a Kashrus-observant Jew?

Can a Jew who understands the laws of Kashrut but is not personally observant cook for a Kosher-observant Jew? For example, can a Jewish but non-observant parent cook for his Orthodox child? Presume ...
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0answers
34 views

Can one buy a container of fresh ground nut butter from a health food store without kosher supervision?

Several "health food" stores near me have a machine that grinds fresh nut and butter. Two such stores are Fairway and Whole Foods. The nuts are grown in California and Georgia (the U.S. state, not ...
2
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1answer
152 views

Hand Cream Glycerin

Is there a problem according to any opinions of using creams and the like because of their treif animal content in the Glycerin of Sicha Kshtiyah:"anointing is like drinking"?
2
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1answer
132 views

May I use a clean can opener previously used for non-kosher cans?

It only had cold contact with treif, if any (only if the food reaches to top of the can); no duchka de sakina was involved. Its contact with my kosher food is also cold - if any (only if the food ...
4
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1answer
87 views

How do we know that non-hechshered food is not kilayim or kilay hakerem?

"Kilayim" and "kilay hakerem" are two classes of prohibitions on eating from "mixed" fields (in which more than one type of crop is planted.) "Kilayim," as I understand it, specifically refers to the ...
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2answers
150 views

Can a sefaradi eat fish with butter?

I heard that it is permitted for a sefaradi to eat fish with butter but not with any other dairy products. Is this a valid statement?
4
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1answer
114 views

Why would spring water or mineral water need a kosher certification?

Nearly every popular U.S. brand of spring or mineral water that I've seen has a kosher certification symbol on the bottle. Amonng them are Perrier and Saratoga (mineral / sparkling) and Poland Spring ...
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3answers
220 views

Are the uncertified packaged pre cut vegetable and fruit platters in a non-Jewish store kosher

In the produce cooler section of stores (such as Costco), one can often find packages of shrink-wrapped cut up veggie and fruit platters. Would the fact that these are precut in the store require ...
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0answers
54 views

Does food need to be double-wrapped for the fridge?

I am familiar with the idea ( What's the halachic advantage of double (or triple) wrapping food? ) that double-wrapping is necessary for a halachic separation in certain kashrus contexts. However, ...
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3answers
791 views

Is AquAdvantage salmon kosher?

After two decades of deliberation, the USA's Food and Drug Administration has approved the first ever genetically engineered food animal, a fast-growing Atlantic Salmon called AquAdvantage ...
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3answers
330 views

How was kashrut affected by Science?

I have been reading a lot of questions concerning kosher foods, to get a better understanding of what it means for something to be kosher. To an atheist, this site is very helpful. But as a chemistry ...
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1answer
551 views

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 ...