Questions tagged [kashering-kosherization]

Questions pertaining to Kashering, the process of making a kitchen or utensils Kosher and therefore fit for use.

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When was kosher certification created? [duplicate]

When was kosher certification created? Another way of saying this question was when did the Rabbis say that it was appropriate to have a governing body (such as the OU, Star-K etc...) which oversees ...
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If dairy and meat come from the same Star Trek replicator, would it be Kosher? [closed]

Apologies for my limited understanding of Judaism, but as far as I am aware, Jewish dietary laws prohibit mixtures of meat and milk. I remember a friend's housemate requiring a second sink and set of ...
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Does [Ma'achalot Assurot 17:22] establish any type of cooking Oil is kosher?

We read in Ma'achalot Assurot 17:22 that : The oil of gentiles is permitted. One who forbids it commits a great sin, for he rebels against [the teachings] of the [High] Court who permitted it. Even if ...
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Why does the Torah give so much detail in the War on Midyan?

Moshe Rabbeinu and Israel fought a number of wars. Maybe starting with Egypt at the Yam Suf, but certainly against Amalek, Melech Arad, Sichon, and Og. Only by Midyan, apparently the last war ...
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What is halachic rationale for separate Passover dishes?

Why separate dishes for Passover? I understand milk and meat dishes. I understand how hot and sharp can transmit treifness, how "noten ta'am l'fgam" works (I think). It all makes sense. But ...
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Ki'bolo Kach Polto

Why can't a utensil that became trief at, say 150 degrees be kashered with water that is 151 degrees? Why must the water be boiling?
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Should one kasher keilim used with Hebrew National? [closed]

Do Keilim need to be Kashered after being used for Hebrew National hotdogs?
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Protein Powder certified kosher but no hescher on package [closed]

A family member bought protein powder which I believed was under OU supervision. It is 100% vegan and has no dairy derivatives which I know means nothing in the kosher world but still. It is missing a ...
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Does one need to kasher a pot that is kosher in all aspects except that kosher meat that is not glatt was cooked in it?

If one does eat strictly glatt kosher and cooks non-glatt kosher meat in a pot. Later on, a different dish with glatt kosher meat is made. Would someone that adheres to glatt kosher standards require ...
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May liquids other than water be used to kasher a material?

Hagalah is when water is boiled in a pot and a utensil is thrown in to kasher it. However, if a liquid other than water, say vinegar or oil, or a solution of water and another liquid is used. Can it ...
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Hagalah Hot Stone

The Shulchan Aruch (451:6) discusses the use of inserting a hot stone into a large pot of boiling water to complete the hagala process. Aside from the 'border-lip' option mentioned in the Shulchan ...
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Nullification of non-kosher utensils or dishes

If an unidentifiable non kosher utensil or vessel gets mixed up with kosher vessels, if the majority of vessels are kosher, it is nullified. [1] If someone makes this mistake a million times, are all ...
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Kashering dishes in a microwave

Can a Microwave be used to Kasher other dishes? For example, to Kasher a metal bowl it could be filled with water and placed on a platter in the microwave for an extended period of time. The water in ...
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Are Double oven Kosher [closed]

I am planning on upgrading my kitchen but and I was wondering if a double oven could be kosher if 1 oven is just meat and one is just dairy.
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Does a knife sharpener need to be considered kosher or kashered?

Does a knife sharpener need to be kosher? Would I need separate sharpeners for milchig and fleishig knives? Does it to be treated like any other kitchen utensil and need kashering?
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Is immersion of utensils (tevila) valid before koshering (hagala)?

dinonline (here) writes that The hagalah [koshering of non-kosher utensils] should be done before the tevila [immersion in a mikve]. Are there other sources saying so? Are there sources saying ...
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The science behind making liver kosher

It seems that salting and soaking liver is insufficient to release the blood sufficiently to make it kosher. It needs to be broiled (or is there some other method that also works?) What's the science ...
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What does the term “mohel” mean in Hilchot Melicha (salting)? [closed]

In Siman 69:20, there’s reference to a “ma’aseh Rashi”, in which Rashi rules that what comes out after shiur melicha is “mohel” and not “dam”. What does “mohel” mean here?
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Knife Becoming Unusable By Threatening Someone With It

I have heard that if a knife is used (even for pretend) to threaten someone it is treif to use unless Neitza is done to it (being stabbed in the ground 10 times). Does anybody know of a source for ...
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Kashering glass used for hot food (Askhenazi custom)

Dears, I am a little lost on the topic of kashering the glass. I read there is a custom not to kasher glass (for the Askhenazi), but I also read they do kasher glass. Some just by washing it, some by ...
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Why does the Chumash wait until Mattos to discuss the laws of Kashering vessels?

The main place the Chumash discusses laws of Kashering is after the war with Midian. One of the explanations I've seen is that this was the first battle where they captured items from a country which ...
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Choosing a microwave oven (e.g.) for ease of kashering

As far ask I can tell, I have a new twist on the already abundant microwave oven literature here at Mi Yodeya. So please be not quick to mark this question a duplicate. My question is this. I am ...
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A drop of milk gets into the chicken soup, can one still eat the soup? [closed]

I think it has something to do with the 1/60 rule but I don't know what that is.
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What methods can be used to kosher meat besides salting and roasting? [duplicate]

There are several people I know that are on a strict no-salt diet. The only method to make meat and chicken kosher without salting that I know of is roasting. This method is limiting. Not everyone ...
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Can one "pickle" meat to make it kosher?

Most of the meat koshering processes that I have read say that one should salt the meat and put it on a board to let the blood drain out. Then, you rinse off the salt. I'm wondering if the salting ...
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Source for Hiding or Locking Away All Non Passover Vessels

Bit of a debate with someone. I never saw my Sephardic family make a special room to lock away all chameitz dishes. Shulchan Aruch Orach Chaim 451:1 Ceramic dishes that have been used for hametz ...
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May One Kasher Utensils During Pesach?

Let's say someone has planned to be away from home during Pesach but finds out that his trip will be ending early and he will be home and needs to cook in his house. Can he kasher his utensils during ...
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Please help a new giyoret kasher her kitchen [closed]

Okay so I've done quite a bit of reading on how to kasher, on what items can and can't be kashered, and how to maintain a kosher kitchen. I have an appointment with my rabbi to come over and help with ...
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Kashering non-Kosher meat + "minimizing a transgression"

Halacha has a strong tradition of "minimizing a transgression" when doing something forbidden, for example taking the shortest route possible when driving on the Sabbath. Applying the same logic, ...
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What is the status of water used for Kashering?

If one kashers a pot by boiling water in it (and throwing rocks in so it overflows) or kashers silverware IN a pot, what is the status of the water afterwards? [I see that water can acquire some ...
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Order for tevilah and kashering

This is an extension of this question. If one purchases used keilim from a non-Jew which would require both tevilah and kashering, which order is prescribed: tevilah then kashering or kashering then ...
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Kashrut of second-hand silverware

Note: I've just emailed my rav to request a psak, this question is purely to explore the halachic background of the issue. Does second-hand silverware require both tevilah and kashering? If one is ...
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2 votes
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Does toasting Thomas's English Muffins make that toaster dairy?

Thomas's English muffins contain whey from a dairy source. Does toasting the muffin make the toaster dairy? Concern: Is the amount of dairy in the muffin less than 1/60 of the ingredients?
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Koshering the celim that milchig bread was baked in

In Shulchan Aruch Yoreh Deah Siman 97 it says that it's ossur to bake "milchig bread" -- lest you come to eat it with meat (although if it's made in a small amount or with a change in it's look from ...
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What is the halacha regarding recooking livers?

Years ago, I would buy a box of raw chicken livers and roast them myself. On the box, there was a note that said that once roasted, it could not be recooked. Recently, I found already roasted livers ...
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does kashering require the vessel to be unused for 24 hours (ben yomo)?

If someone is going to be kashering via hagala or by libun does the cleaning of the items prior to kashering require the vessel or utensil also be left unused for 24 hours? If yes, why?
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Can Microwaves ever need Libun?

Very often microwaves have food splattered all over them. If the oven were to need to be Kashered would the spots that had food on them need Libun since they absorbed food directly (without a liquid ...
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Kasher keilim for chadash?

If one holds that chadash is assur chutz l'aaretz (or is in Israel), and accidentally cooked a chadash product, would the taam of the chadash that is absorbed in the keilim be a concern, and would you ...
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Kosher or not: hind-quarters of sheep & cow?

Would some kind person advise me on the Halachic status of the hindquarters of a sheep or cow for kosher consumption on the table. It is my understanding that a leg of a lamb, for example, may be ...
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What parts of an animal require kashering prior to eating?

I assume that the reason for koshering meat is to get rid of the blood. If that is the case, if someone eats gribenes, which are fried chicken skins, do the skins need to be koshered? What if one ...
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Kashering earthen ovens

I see that people still make earthen ovens, however, before making one I want to see if it theoretically can be kashered. I know that earthenware vessels cannot be kashered (I heard that it has to ...
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If I left my kitchen under the control of someone who is a Gentile or not Shomer Shabbos, is it still kosher?

If I left my kitchen (or set of kosher dishes, etc.) with someone who is a) not Jewish or b) Jewish but not shomer Shabbos--in such a way that they could access it and hypothetically do anything they ...
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Can you use a not kosher knife sharpening stone/wheel [duplicate]

I learned the the sharpening stone kashers the knife But are there any sources regarding the use of a sharpening stone/wheel that was used for non kosher knifes (possibly used even when dirty knives)...
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Is bleach equivalent to boiling water for kashering? [duplicate]

It is indicated by rabbinical authorities to kasher utensils by dipping them in boiling water. This is because boiling water kills bacteria and yeasts, and removes absorbed flavors. Bleach can do the ...
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Koshering canning jars

If someone cans using Ball brand glass canning jars (and new lids are used every time, so nothing to worry about with those), In the normal canning process, the jars are boiled to sterilize them prior ...
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Kashering a stove

The common custom I have noticed is for people to use the same stove top for meat and dairy. However, people also claim you need to kasher a stove top before use. How are these two positions not ...
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May non-kasherable items be put into kosher service if they arrived new-in-box?

I understand that glass and ceramic are not kasherable but they still are by far the most convenient and least expensive materials for dishes and cups. If these vessels were purchased new-in-box, it ...
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Kashering a kashering pot

My family, after boiling water and pouring it into the sink to kasher the sink, then reboils that pot and causes it to overflow in effect kashering itself. Is there any source to be required to do ...
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How do you kasher your teeth?

A Pesach preparation guide tells me to kasher my teeth on Erev Pesach. How on earth does one do this?
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Do you have to re-tovel non-Pesach dishware after buying it back?

"Utensils which are bought from a non-Jew, even if they are brand new, require immersion in a kosher mikveh." --From Weekly Halacha: Selected Halachos Related to Parshas Vayera by Rabbi Doniel ...
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