Kashering Archives

May I buy Keilim from someone who cooked food in them on Shabbos B’Meizid? How about buying kosher products that were cooked in these Keilim?

The Keilim may be bought but must first be kashered. Food cooked in these Keilim are forbidden. טעמים ומקורות: ראה מג״א שיח, א. פמ״ג בא״א. תהל״ד א. ובאו״א -…

Can a Fleishig knife that was used to cut cheese be Kashered? The knife had not been used for meat 24 hours prior, the knife and cheese were both cold. If so, can it be Kashered in boiling water? Please advise.

If both were cold, the knife does not need to be Kashered - just washed (NOT in hot water). #4297

By accident I fried schnitzel with a coating that had a seasoning which contains milk in it. I was using a cast iron pan. How can it be Kasherd?

This requires a Libbun Gamur. This can be accomplished by putting it into his self clean oven for a complete cycle. #4066

Article: Are Public Hot-Water Urns Kosher?

A hot water urn that is available for public use in a place of business, work or school cafeteria or an airline kitchen may become Treif (non-kosher) when it comes…

A non Cholov Yisroel K-kup was used in our school Kuerig machine. Can it be Kashered?

Thoroughly clean the needles and K-cup pack holder as per the Keurig instructional video here. Pour in detergent. Replace the cup holder with a new K-cup holder (a replaceable…

Can I Kasher my oven for Pesach or during the year with a blow torch?

A oven can be Kashered with a blowtorch. However, using a blowtorch on the inside walls of a oven until it is red hot (what would be required…

We typically would not Kasher our year round oven for Pesach use. We have someone who wants to give us a used oven, is it permissible to Kasher it for Pesach to use on Pesach and leave it Pesachdik?

According to Halacha, one may Kasher a Oven for Pesach, though there are various levels of Chumra as to how to Kasher the oven. Some are Machmir not to…

Can granite counter tops that are sealed, be Kashered? What about a sink made of porcelain?

Granite counter tops that are sealed can be Kashered. See here. Porcelain cannot be Kashered.

Can/does one need to kasher a glass table?

Glass cannot be Kashered. If the table was used to put hot food directly on the table (or hot pots with liquid under it) the table is Treif. Make…

By mistake a Milchig cocoa powder mix was used to make hot cocoa in my Fleishig glass cups and one mug. Is there a way to make the glass cups or the mug kosher again, or do I need to throw them out?

The powder mix was put directly into the cup, and then the cup was filled with hot water from the urn. Then some almond milk was poured to top it…

Someone started warming up shntizel in my Pareve microwave and we quickly shut it before it got very hot, but it was already a little warm to the touch. Do I need to Kasher my microwave to make it Pareve again?

2. If I keep the microwave Fleishig: a) May I heat up Pareve items and then bake them in a Pareve/Milchig oven? For instance melting chocolate for a Pareve/Milchig cake…

שמעתי שיש בעיה בכלים חדשים שלפעמים מערבים שומן לא כשר ולכל צריך הגעלה. האם זה נכון? ואם כן איזה סוגי כלים צריך הגעלה? או שהכל ואילו סכו”ם

יש החוששים שמורחים כלי מתכת וטפלון בשומן מן החי בשעת היצור ודורשים להגעיל. למעשה, מן הדין אין צורך כלל להגעיל, והוא חומרא בעלמא. ויתכן שגם אינו בגדר מדת חסידות. …

Cheese was melted in a Fleishig microwave. What should I do?

It must be Kashered. Kashering a microwave from Milchigs to Fleishigs or from Fleishigs to Milchigs on a regular basis is not appropriate, since it is a generally accepted custom not to Kasher regularly back and…

I washed my Pareve knife in the Milchig dishwasher. Soap in the first cycle. Is it still Pareve? If not, can it be Kashered back to Pareve?

If the soap mixes with the water before the hot water rinses the dishes, then it does not need to be Kashered. If this is not the case (this depends…

Can Caesarstone quartz counter tops be Kashered? Do you have recommended materials for a new kitchen’s counters (other than granite, which is expensive), that would be easy to be Kashered if necessary in the future?

Engineered quartz resin counter tops is a man-made material made to look like granite or marble. They are made from a combination of stone, synthetic resins and pigments and is different than natural…

Do new stove tops and ovens need to be Toveled or Kashered?

The stove top does not need to be Toveled. If it is brand new, it does not need to be Kashered either. Sources: לענין טבילה, ראה שו"ע סי' ק"כ…

I’m living in an apartment with some friends who aren’t very careful with Kashrus. Can I use the pots and pans that I am pretty sure are kosher?

I'm living in an apartment with some friends who aren't very careful with Kashrus. Some of the Keilim used for food are probably not kosher anymore. There's a few Keilim…

What is the status of this pot?

I washed a Fleishig pot that was used to cook mashed potatoes with a Milchig sponge that was used that day for Milchigs. The pot is metal and the cover…

In this case is the pan and spatula still kosher?

We cooked shakshuka, and it included jalapenos, garlic, onions cut with a Fleishig knife (not Ben Yomo) and then cooked it in a Fleishig pot (not Ben Yomo), and later…

We have a Pareve knife used for cutting onions. The knife was washed with dirty Fleishig dishes. May I Kasher the knife back to Pareve status?

One may Kasher from Fleishig to Pareve. Even from Fleishig to Milchig is permissible if it became Treif. See here for a discussion on the topic.