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

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Would a mermaid be kosher?

Tonight at religious school we were discussing Kosher laws and how to build/keep a kosher kitchen. While we were discussing different meats, one of the jokers in school asked if you could eat a ...
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1answer
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Is snow Kosher? Icicles?

The recent snow storm got me thinking about this. So are you allowed to eat snow? What about icicles?
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1answer
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Kashrut of Oven Mitts [duplicate]

Since kashrut often requires one to have separate sets of cooking utensils for dairy and meat, should one use separate dairy and meat oven mitts?
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2answers
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Does soy milk need a hechshir

Does soy milk need a hechshir since they put in artificial things that can be trayf or its all natural and it won't need a hechshir
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Marshmallow Mistakes [closed]

From my shul's kashrus guidelines: Products from Israel, under rabbinical supervision, are reliable! However, you must make sure that the product does not contain gelatin (even "kosher" gelatin). ...
2
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1answer
88 views

Eating at Home and Maarit Ayin

Short question: is maarit ayin (מראית עין) a problem when one is home alone? Long question: assuming that in-vitro meat is pareve, even if it is maarit ayin to eat it with milk in public, would it be ...
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1answer
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In vitro meat — further questions

Related to this question: Does artificial meat grown in a petri dish have the halachic status of meat? Assuming that in vitro meat becomes widespread and assuming that it would be hechshered per the ...
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Proper course for one realizing he is eating something forbidden [duplicate]

Suppose one was eating a piece of chicken, and he finds out it was from a non slaughtered chicken. Does Halacha require him to try to throw up?
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1answer
236 views

What defines “hard cheese” [duplicate]

I grew up with the minhag that after "hard cheese", one must wait for 15 minutes before one may eat meat. However, the question often arises as to what qualifies as such in terms of halacha and ...
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1answer
85 views

The Torah's list of animals with one kosher sign

I have a question that has been troubling me for many years and I have never received a satisfactory response. On March 22, 2005 THE NY Times had an article entitled Religion and Natural History ...
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1answer
400 views

Does electronic cigarette juice require a hechsher?

Does electronic cigarette "juice" need to be kosher (require a hechsher)? Does it matter what flavor the juice is?
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1answer
161 views

How was kosher cheese made before artificial rennet?

I understood that cheese is made by throwing in Stomach hide into milk and letting it congeal. How was kosher cheese made (where one's not allowed to mix milk and meat)? Now we use chemicals or ...
3
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1answer
63 views

Eating in a non-kosher household [duplicate]

I am a converted Jew (mother is not Jewish, father is) who has recently began keeping Kosher. My mother is an excellent cook, and I greatly enjoyed eating what she made growing up. I still would like ...
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1answer
72 views

How big can insects be before falling into kashrut halacha?

So we typically clean vegetable matter of bugs because, while it isn't an aveirah to eat a bug part if it's smaller than a(n) (halachic) olive, it is still prohibited to eat any non-kosher living ...
2
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1answer
54 views

What can you look for to ensure that a vegan restaurant is Kosher? [duplicate]

Vegan restaurants claim to serve strictly vegetable and plant-based meals. They would seem to be automatically Kosher, but I've read and heard that there could be other Kosher issues. What are ...
12
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1answer
160 views

Milk-free cheese: Is it kosher? Parve?

So according to this article, scientists have created cheese by inserting DNA blueprints into a yeast. Essentially, the milk proteins are being created outside of any animal, through genetic ...
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2answers
349 views

Whatever happened to plumbas?

Not so many years ago, a plumba (apparently created by Rabbi Jacob Joseph) -- a metal tag attached to the wing of a kosher chicken indicating that it was, indeed, kosher -- on a kosher chicken was the ...
8
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4answers
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Wait 6 hours after milk?

I once came across someone who was avoiding the meat at a lunchtime simcha. When I asked him why, he said it was because he had eaten "cereal with milk" at breakfast. When I expressed confusion, ...
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1answer
69 views

Can I use the Flavia coffee machine in my workplace?

There is a coffee machine (also makes tea and hot chocolate) in my workplace that uses individual packets (not pods) for the drinks. I do not know what the mechanism is for turning that into a drink ...
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0answers
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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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1answer
110 views

Is human placenta kosher?

There is, apparently, something called placenta encapsulation which means making pills out of a placenta postpartum for the purpose of digesting placenta. People claim that these pills offer unique ...
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4answers
145 views

If the majority of organic and/or free range eggs contain blood spots, why are they certified kosher? [closed]

Variables that are known of the organic and/or free range: I don't believe the eggs with blood are just protein spots even though brown eggs through observation usually do contain more protein spots ...
5
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1answer
66 views

Homebrewer then converts; are there leniencies that allow him to drink the beer he made?

Suppose a gentile is a homebrewer who later converts to Judaism. Fermentation and aging can be long-running processes, so even if he knew to anticipate the problem and ceased homebrewing activities ...
6
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1answer
362 views

Does flavored dental floss need a hechsher?

You can find flavored dental floss these days usually in the flavor of mint. Is there anything to worry about or is it no worse than mint mouthwash? If not, doesn't the gemarah in berachot 6th perek ...
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0answers
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The opinion that microwaves don't need to be kashered

So I remember hearing this opinion that followed like this: "Microwaves do not need to be kashered because the means of cooking in a microwave are different than those spoken about in the Gemara." ...
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What defines a “בהמה” (also “חיה”)?

As discussed in *Dag* (דָג) in kashrus halacha, *Tzomeach* (צוֹמֵחַ) in kashrus halacha, and *Of* (עוֹף) in kashrus halacha, there are different rules used to determine the kashrus status of ...
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*Tzomeach* (צוֹמֵחַ) in kashrus halacha

To find the kashrus status of an organism, we first need to correctly classify it as tzomeach, animal, bird, or fish, as each group has its own distinct requirements. E.g., animals need to chew cud ...
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1answer
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*Of* (עוֹף) in kashrus halacha

To find the kashrus status of an organism, we first need to correctly classify it as plant, animal, of, or fish, as each group has its own distinct requirements. E.g., animals need to chew cud and ...
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1answer
262 views

*Asher Bamayim* (אשר במים) in kashrus halacha

To find the kashrus status of an organism, we first need to correctly classify it as plant, animal, bird, or asher bamayim*, as each group has its own distinct requirements. E.g., animals need to chew ...
5
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2answers
92 views

Are mouse-deer kosher?

Mouse-deer do chew cud (they has four stomachs), but have not two, but four hoofed toes. Are they kosher?
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3answers
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Is it acceptable under kashrut to eat tyrannosauridae meat?

Theoretically speaking, if tyrannosaurs were still present these days, or in some way or another brought back, would they be kosher? Let's assume that they are properly slaughtered and prepared.
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3answers
575 views

To what grains do the laws of yoshon apply?

For which species must we wait until after pesach to eat the previous crop? Are there different cut-off dates for different species?
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1answer
49 views

How do you look into a Pesach program?

I often hear that Passover programs are fraught with potential issues, primarily in the area of kashrus, but also with the reliability of the Rabbanim there and other issues. How can one go about ...
4
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1answer
274 views

Does loose leaf tea need a hechsher?

Sometimes I find bags of dried tea leaves of various sorts in my local Turkish store. Do such teas need a hechsher (certification as kosher)? Is there any indicator I can use to tell if it's kosher or ...
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1answer
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In what case can a wine made from the “Fruit of the Vine” be kosher but not acceptable for kiddush? [duplicate]

I saw a post the other day where a religious Jew posted a picture of a new wine he got and clarified that it was made from the "fruit of the vine" and yet it wasn't good for kiddush. What kind of ...
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0answers
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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 ...
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2answers
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Kashrus Advising agencies

There seems to be a lot of kashrut organizations that deal with their respective hashgachas. But rarely do they advise about other organizations or products that arent certified. Are there any ...
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2answers
535 views

Can you give an animal a tranquilizer, and proceed to slaughter it?

Can you shoot an animal with a tranquilizer, or feed a tranquilizer to an animal, and proceed to slaughter it in a kosher manner?
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1answer
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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 ...
6
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2answers
347 views

What's the Bishul Akum heter for hard-boiled eggs?

I've seen prepackaged hard-boiled eggs in the grocery store with an OU. As eggs are relatively inedible raw, what is the heter vis-a-vis bishul akum for them? (Or are they having a Jewish mashgiach ...
3
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2answers
92 views

Biologically, what are sirchos?

Biologically, what are Sirchos? Are they a Tumor?
3
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1answer
80 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 ...
4
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2answers
928 views

Are We Not Supposed To Eat Fat?

In Leviticus 3-17 it states: All fat is the lord's. It is a law for you for all time throughout the ages, in all your settlements: you must not eat any fat or any blood. כָּל-חֵלֶב לַיהוָה ...
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3answers
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Is there a “5 second rule” for foods becoming non-Kosher?

OK so I don't actually mean a 5 second rule. But is there an amount of time that it takes for something hot that comes in contact with a non-Kosher utensil or surface to become not kosher? For ...
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1answer
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Why does Hashem allow Noah et al to eat *all* animals?

Reading the parsha today, I noticed for the first time that Bereishit 9:3-4 seems remarkable (JPS translations): .כָּל-רֶמֶשׂ אֲשֶׁר הוּא-חַי, לָכֶם יִהְיֶה לְאָכְלָה: כְּיֶרֶק עֵשֶׂב, נָתַתִּי ...
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2answers
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What does having a Mehudar Etrog and Lulav mean over just having a kosher set?

I often hear the word 'Mehudar' used during this time of year to refer to special Lulav-and-Etrog sets. What does Mehudar mean?
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1answer
37 views

Are Dunkin Donuts Coolatas kosher?

For the purposes of this discussion, let's assume that unflavored coffee with milk is kosher everywhere you go. (Related MY question) Are Coolatas (from Dunkin Donuts) included in this? A friend of ...
2
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1answer
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What do I need to know to properly kasher utensils in boiling water? [duplicate]

If someone wants to kasher their utensils using a pot of boiling water, what do they need to know to do it correctly? Among other issues, consider: Are there issues with how long items need to be in ...
3
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2answers
89 views

Medjool Dates (bugs?)

We have a 2 lbs box of medjool dates. Very fancy. But it has been on the shelf for about 2 months. At first, when we split it, no visible bugs. Now we are seeing small white spots near the seed, salt ...
2
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1answer
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Waking up fleishig [duplicate]

I once heard that you cannot wake up in the morning being fleishig, meaning if you go to sleep for the night, even if you sleep less than 6 hours (or whatever time you wait), you are pareve and can ...