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

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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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Do non-toxic, biodegradable kitchen/dish cleaners pose a Kashruth problem?

In certain instances, I've heard rabbis allow soaps and harsh cleaners to be used to make food and food-residue "Pagum" (ruined), which then removes any prohibition that might otherwise result when ...
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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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Kashering cold dishes for Pesach

If a vessel only held cold food, never hot, but was washed in the dishwasher, does it need hagalah for pesach? Or nothing? Is your minhag not to use any year-round cookware for pesach, or do you ...
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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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What is the overall procedure to upgrade a kitchen to kosher service?

If a Jewish family buys a house from Gentiles, naturally the kitchen would not be left in a kosher state. What is the list of special decontamination or other upgrade procedures necessary to convert ...
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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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Can one buy lettuce and cabbages, etc. from a non-Jewish produce store?

I have noticed that some non-Jewish owned produce stores in U.S. have someone trimming the rotten or ugly leaves off the edge of lettuce, cabbage and other similar leafy vegetables. The knife used is ...
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146 views

Microwave oven and goy (me) cooking [duplicate]

Is cooking kosher food by a Goy - in this case me (doing giyur) in a microwave oven making the oven unsuitable for use by a Jew? I asked one rabbi who said there is no halakhic issue. I live in a ...
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Is honey extracted from a dead bee kosher?

Bees themselves are not kosher, but their honey is. The honey is taken from the hive. If I found a bunch of dead bees and I cut them open and extracted the honey from the body, can I eat this?
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Purple/Red Cabbage kashrut issues

Funny thing happened to me tonight. I was buying some falafel and noticed that they did not have any "purple cabbage" (a.k.a. red cabbage) as a side dish option. I asked if they had any in back, and ...
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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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556 views

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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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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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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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?
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Length of time for waiting for hard cheese proportionate to the length of time it was aged

In a Halachic pamphlet I saw before Shavuos this year, it mentioned an opinion that one must wait after eating hard cheese one hour for every month it is aged (so if it was aged three months, three ...
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Issur Sefichin on Otzar Beis Din produce

The Sages were concerned that individuals would plant vegetables in the seventh year and claim that these had grown by themselves. They therefore forbade consumption of Shemitta vegetables where the ...
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Are you allowed to take pills with gelatin [duplicate]

According to Halacha, are you allowed to take pills that are covered with gelatin? It's an antibiotic for acne.
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What is the best way to keep updated with status of hechsheirim in Israel?

There are many halachic (and sociopolitical, agricultural, religious, economical, etc.) kashrut issues pertinent to Israel alone, leading to a great variety of challenges that kashrut authorities face....
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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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Can an enamelled pan be changed from meat to milk/pareve? [duplicate]

I have a metal pan that is enameled white on the inside, which I have had for more than 40 years, and hardly used. I originally intended it for meat, but now I think I might get some use out of it if ...
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Why did they stop packing the gizard, neck and liver inside the chicken cavity?

Why did they stop packing the gizard, neck and liver inside the chicken cavity? I think this practice stopped about 25 years ago. When I was a novice cook, I didn't know that I had to first take out ...
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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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Can Food Remnants make you fleishig/milchig

ב"ה Can food remnants, like stains, make you fleishig/milchig? For example, if I had a steak and got it on my sleeve, then the next day wiped my mouth with that sleev,e can I become fleishig from ...
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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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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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278 views

Equipment used for cooking by a non-Jew

I've heard that even if kosher ingredients and equipment are used, the food cooked (i.e. using heat) by a Gentile isn't kosher in most circumstances. I am wondering what the opinions are regarding ...
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Maris Ayin and bags from restaurants

Similar to this question, suppose there is a chain of restaurants that is mostly non-Kosher, but there happens to be one kosher franchise in the chain. The example I am thinking of is that there is ...
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Can I use Bounty to drain my food? [duplicate]

Possible Duplicate: Kashrus of Paper Towels Using paper towels such as bounty can be very useful when on a diet for draining the oil off of foods. However, I heard rumors that bounty is made ...
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Is vaping prohibited?

With the rising popularity of vaping and electronic cigarettes, many might consider turning to them to stop smoking or to at least divert their habit to a healthier alternative. However, the liquids ...
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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) isn'...
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How can you get hot kosher food on campus?

So you're living in a college/university town with no kosher restaurants. How can you get hot kosher food?
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Are there any national brands of tuna that are Bishul Yisroel?

Are there any national brands of tuna in the USA that are Bishul Yisroel?
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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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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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Can one rely on halal combined with vegetarian labels?

i understand that halal can not be trusted for meat, but what about items that are certified halal and certified vegetarian? There are many vegetarian curry pastes and other spice pastes that can be ...
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Commercial kosher slaughter

Kosher slaughter today is mainly carried out in large factory settings, with each shochet slaughtering hundreds or even thousands of animals every day. The required inspections of organs is also ...
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Kashering with a potted plant

On Friday, my grandmother made a comment about kashering a knife by sticking it in a potted plant (with very loose soil), something which will not kasher anything. What is the origin of this bubbe-...
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Giving away coupon to non-kosher restraurant

Can a "kosher eating only" Jew who receives a coupon for a free meal at a non-kosher restraurant give that coupon to another jew, even if they don't keep kosher? I know you are not making them go and ...
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The Shafan and Arneves

What are the Shafan and Arneves (Leviticus 11:5-6)?
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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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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 ...
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Is the Citrus flavored Ciroc vodka kosher?

I would like to buy citrus flavored "Ciroc" vodka and wonder if it's kosher?
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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 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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May a person order food from a vegan restaurant

May a person order food from a vegan restaurant? — assuming you aren't ordering cooked food, to avoid the problem of bishul akum. If your ordering let's say a salad, what could be the problem? ...
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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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Cholov Yisroel “Kashered”

So I was eating one of my favorite meals -- a bunch of peanut butter and cheese sandwiches, and to pass the time, I looked at the package of cheese. It is "Natural and Kosher" by Anderson ...
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Is Ethanol Mixed Gasoline Kosher for Passover

Typically in the US, gasoline for cars is a mixture of refined crude oil and some ethanol up to 10%. Since ethanol in the US is corn based, by buying gasoline are you buying kitniyot?