Daily Halacha - Is it Permitted to Place Congealed Food on a Hot Plate?
Practical halachic guidance on Shabbat warming: what can and cannot be reheated
- הלכה יומית / מפסקי מרן
- פורסם כ"ח טבת התשע"ח
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Is it permitted to heat water that was heated and cooled before Shabbat?
The rule of cooking after cooking (bishul achar bishul) specifically applies to foods that improve with extended cooking, but foods that deteriorate with extended cooking may be reheated even if they reach the temperature of yad soledet bo (too hot to touch). Therefore, according to the basic law, it is permitted to heat water on Shabbat that was heated on Friday and cooled down (Yabia Omer 7, 42, Responsa of the Rishon LeZion 2).
Is it permitted to place congealed food on a hot plate?
Naturally dry food such as chocolate or jam may be placed on a hot plate even though it is known that after some time it will become moist and reach yad soledet bo temperature. However, it is not permitted to place gravy that has congealed due to refrigeration on a hot plate [Shulchan Aruch 318, 16].
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