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Questions tagged [cooking-bishul]

for questions about cooking generally and also about the halachic concept of bishul

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A better way to warm up food on shabbat morning

When warming up food on a hot tray on shabbat, most poskim do not allow one to put the food directly on the hot tray, but rather insist on a plate or inverted pot or pan be placed on the hot tray and ...
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86 views

If one accidentally reheats some soup on Shabbos, are they allowed to eat it?

If someone left soup on a hotplate when it was off, forgetting that it was on a timer and would come back on later, can he eat it after the soup is reheated, because you can't do this on Shabbos?
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Is Sous-vide Cooking or Roasting?

It has been discussed here previously regarding the Sous-vide method of cooking. However I have a separate question. What type of method is halachically categorized as? Is it Tzli or is it Bishul? ...
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174 views

Can one bake silkworms in a kosher oven?

Raising silkworms can be a fun project. If you're trying to get silk thread, the last step of the process, after they finish spinning their cocoon, is to bake them in the oven to kill them (if they ...
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Is blood “batel beshishim”? [duplicate]

I ask this question because I notice what seems to be a practical "contradiction". Inevitably, even after salting meat, there seems to be some blood in it. Yet, I notice some people that eat raw meat ...
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Tankless Water Heaters on Shabbos and Yom Tov

I have been trying to understand the issues with tankless water heaters on Shabbos and Yom Tov. (The simple description of how this works can be found here and here). I found this answer on Mi Yodeya ...
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36 views

How to cook with a metal disc on a treif glass top stove?

The Star-K gives this advice for kashering a glass top stove: https://www.star-k.org/articles/articles/kosher-appliances/2931/kashering-glass-corning-halogen-or-ceran-cooktops/ The sentence that I am ...
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2answers
202 views

Is hot water on an airplane kosher?

Why is it generally assumed that hot water on an airplane is kosher? Is the urn that warms up water on an airplane strictly for water use? Or do they alternate and it can be used sometimes for other ...
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68 views

Cooking for the next day on yom tov

The Shulchan Aruch 503 writes that one cannot cook for the next day of yomtov . My question is once its the second night can one cook on the second night for the second day meal? Do we say the night ...
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1answer
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May one marinate fish on Shabbat?

I was viewing O.C. 321 and there are a few halachot at the beginning that mentions that one cannot salt or put cabbage in vinegar on Shabbat because it is similar to cooking. My understanding of this ...
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Can one cook meat and fish dishes at the same time in the same oven?

The gemara in Pesachim 76b forbids one from cooking meat and fish together because of danger. But can one cook meat and fish dishes separately at the same time in the same oven? There can be a need ...
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Is cooking food in one's mouth forbidden on Shabbos?

If someone put an uncooked food into his mouth on shabbos, and then drinks water which is hot enough to cook the food (עירוי כלי ראשון שיד סולדת בו or if the food was מקלי הבישול even from a כלי שני) ...
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94 views

Is there any permissible way to put cooked dry food into an oven on Shabbat?

I know that this seems like a very generalized question. But, perhaps, someone can help me understand something. I've viewed a number of online sites regarding whether one is allowed to rewarm dry / ...
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67 views

Leftovers and Chillul Shabbat

Suppose you were to cook much more food than you ended up needing on a given shabbat. Would it constitue chillul shabbat (or be disrespecting shabbat in any way) to either: A) eat the leftovers on ...
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Eruv Tavshilin and cooking immediately before shabbat

The gemara in Pesachim 46b appears to contain an argument as to why it is biblically permitted to cook on yom tov for a shabbat which immediately follows it. Rabbah implies that we need to rely on ...
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An Unblech that may/will boil off

If someone uses a water blech (Unblech or k'deirah) to exploit whatever halachic advantage he sees from this pot on a pot method, does he have to anticipate the possibility that the water inside will ...
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Food cooked on Shabbas for Pikuach Nefesh

What is the status of the leftover food cooked for a person who was critically ill on Shabbas? Halachicly one is allowed to cook food on Shabbas and eat it if their life is in jeopardy. However, let'...
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Is it Mutar to do Shehiya and Chazara on Sternos?

Assuming the the water in the bottom pan is Yad Soledes Bo before Shabbos would it be Mutar to do Shehiya for the Friday night Shalom Zachar or the like on top of Sternos? I was primarily thinking ...
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236 views

Using hot water on shabbos

Is there any heter to use hot water on shabbos - for say washing dishes, or for bathing children (not addressing issues of drying hair etc)? Does leaving a faucet of hot water running before shabbos ...
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2answers
127 views

Explain why the “kli sheini” rule works regarding Shabbat cooking

Please excuse my weak knowledge in this area. I find the cooking laws of Shabbat quite confusing and I'd like to get a simplified understanding of it, if possible. Apparently, pouring hot water from ...
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1answer
345 views

Warming up cold liquid on shabbas

There is a concept of ein bishul achar bishul (you can't cook a food more once its cooked already) . This concept applies to dry foods according to all opinions and one would be able to warm such food ...
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1answer
65 views

Can one char / sear a frankfurter on Shabbat?

I'm trying to get a better understanding of the general rule that "there is no cooking of already cooked foods". Let's say a frankfurter has already been cooked (via boiling, etc.) If one puts the ...
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Is the definition of “cooking” on Shabbat specific to applying heat energy?

In college, I recall an experiment where we boiled water by reducing the pressure in a flask that contained water until the water boiled. No heat was added. Would this be considered a melacha of "...
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2answers
89 views

Is a soft boiled egg fully cooked?

On Shabbos, Chazarah, which is returning something onto the fire, is permitted if it was fully cooked already (among other conditions that have to be met)although it is Mitstamek v'yofe lo. Is a soft ...
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Temperature controlled urn on Shabbat

What issues may be at play when adjusting the temperature of an urn on Shabbat, e.g. from 200° F to 80° F, specifically on an urn pictured below*? (Assuming the water is already pre-boiled before ...
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1answer
51 views

Source for cooked milk and בשר חיה ועוף being אסור בהנאה

בשר חיה ועוף cooked with milk are אסור to eat מדרבנן. Mistama, that means that the מחבר holds that it's מותר to get הנאה from this mixture. What I want to know is... Are there any שיטות that hold you ...
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2answers
153 views

Why can't we have challah in the oven with other food?

I am talking about halachic challah -- the portion taken for the offering. I was taught several times that these days, what to do with it is to burn it to a char in the oven. I also learned that this ...
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1answer
59 views

Outside air temperature and kli shlishi

On שבת to avoid cooking (בישול) when preparing hot drinks, such as tea or coffee, we pour hot water from the urn (כלי ראשון) into a second vessel (כלי שני), and from the כלי שני to the third vessel (...
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1answer
332 views

Why is making tea/coffee on shabbos not considered bishul

Bishul/cooking is food prepared by heating in liquid. Why then is making tea/coffee not considered cooking?
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1answer
138 views

Can one warm cooked food on Shabbat by pouring hot water into it?

Is it forbidden to take some water from a hot water kettle and pour some into mashed potatoes for instance? Or any other cooked food?
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124 views

Rules for non-kosher kitchen

What are the rules for cooking in a non-kosher kitchen with kosher utensils (pots, cutlery, etc). Can a microwave be used if its contents are double-wrapped? Can the burners on a non-kosher oven ...
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1answer
71 views

Looking for a kosher hot plate for Shabbos and Yom Tov

Does anyone know of a kosher hot plate that can be safely left on for the duration of Shabbos, Yom Tov, or a 3 day Shabbos and Yom Tov and will not become a fire hazard? Every product should be and ...
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77 views

Breville smart oven and kashering

I've seen this oven in a few places. The question is: whether it's an oven or a toaster oven in halacha. My family holds like the 'Aruch haShulchan (Yoreh De'ah 92:55) for regular ovens (that one may ...
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2answers
131 views

Why can we do some melachos for eating on Shabbos but not others?

I learned that certain melachos are permissible on Shabbos in the course of eating or for the purposes of eating. For example, the question of borer in light of "derech achilah"/"derech melacha" is ...
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Bishul Akum - lo plug?

There is a dispute between the Mechaber who is stringent and the Rama who is lenient with regards to bishul akum and how much involvement of a Yisrael is necessary to wipe away the issur of bishul ...
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1answer
313 views

Where can I get an Unblech?

An Unblech is a Blech which has a pot of water to stabilise temperature. None of the area Jewish shops sell an Unblech (also known as a k'deirah Blech). Where can I get an Unblech, in NYC or on the ...
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450 views

Induction Cooktop on Erev Shabbat

There are statements on the web, for example from Star K, to the effect that an induction cooktop cannot be used on Shabbat. My question: are those statements outdated? Consider this: One could ...
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1answer
76 views

What is the source of a minhag not to boil a single egg?

I have heard that some people have a minhag to prohibit boiling just one egg in a pot. What is the source or reason for this? Is this a kashrut concern, or something specific about eggs?
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4answers
151 views

What is liquid (prohibited from reheating on Shabbat)?

How liquid does something have to be to become prohibited from reheating on a blech on Shabbas? I'm really wanting to know how "soft" or mushy something can be before being considered liquid and not ...
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1answer
175 views

Putting food into a cli sheini on Shabbos

We know that a food that is a "davar yavesh" (dry) that was already cooked (in a cli rishon) before Shabbos may be put into a pot of hot water (even a cli rishon -- so long that it is on the fire) on ...
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303 views

Do fresh noodles need a hashgacha?

I saw this video earlier today and it got me thinking: nothing in the recipe for fresh ramen noodles (as opposed to instant ramen) requires a hechsher on its own, as the ingredients are: flour, water, ...
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3answers
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Why isn't this a violation of the halachos of nat bar nat?

This page, discussing nat bar nat (“Nosein Ta’am Bar Nosein Ta’am”--"that which gives taste is the son of that which gives taste"--a halachic concept addressing the transfer of taste from foods to ...
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41 views

Offset Smoker – Kli Rishon or Sheini?

An offset smoker is a device for smoking food in which the fire is in a compartment (A) which is not completely connected to the cooking area (B), as in the image below: In theory at least, parts A ...
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1answer
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cooking for shabbat in a campfire

Does anyone know where there is a elaborated set of Halachot for Shabbat in the outdoors. More precisely I would like to cook chicken on coals for Shabbat morning. My idea is to make a bonfire Friday ...
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1answer
459 views

Can one cook food while fasting?

Can one cook food while fasting and eat it when done fasting? Does it matter if the food being prepared is for oneself or others? Maybe cooking would distract from the focus that a fast is supposed ...
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2answers
159 views

Hechshered, pareve sausage casing

I've become interested in sausage-making. However, I have had some understandable difficulty finding non-meat casings. Furthermore, I have been unable to find pareve casings with a hashgacha. Is ...
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1answer
108 views

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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292 views

May Passover matzoh be made from durum wheat flour and then reground as meal for Italian pasta?

Italian pasta is generally made from durum wheat (semolina) flour. Wheat is one of the grains from which Passover matzoh can be made. Normally matzoh is baked at high heat from flour and water only, ...
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88 views

Gas Pilot on Yom Tov

A gas pilot stove is a stove which has a continuous flame running rather than using an electric sparker (although I believe such stoves are no longer legal). With this in mind, would it be necessary ...
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362 views

Is checking for bugs halachically required?

Various methods of checking for bugs in produce, i.e., lettuce, are officially recommended by kashrus agencies and other halachic professionals. However, is use of one/any of these methods--or even a ...