Is it possible to to put cold soup from the refrigerator onto a hotplate (without a temperature control) on Shabbat morning to have with lunch or does the soup need to have remained on the hotplate all night if placed there before Shabbat begins?

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Thank you.


It is not permitted to place cold soup on the hotplate during Shabbos.

This is considered bishul, because once a liquid has cooled it has lost its virtue of being ‘cooked’, and can be cooked again. [Tihere is an opinion that there is no bishul even for a liquid that was cooked and cooled, but we follow the stringent opinion.]


See Shulchan Aruch, Orach Chaim 318:4 and Rema 318:15.

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