Question:
Does a person need to line the crockpot with silver paper /and silver paper extending over the crockpot and remove the knob if the cholent is fully cooked before the onset of SHABBOS?
Answer:
Hello,
You do not need to put silver foil etc., if the food in the crock pot is fully cooked before Shabbos, however you will not be able to remove the crock to take food and then return the pot to the heating element, as that would be “chazara”.
Best wishes
Sources:
Orach Chaim 253-2