Hotpan (3.5e Equipment)
From D&D Wiki
Hotpan: This pan magically heats itself up to cooking temperature for one hour per day giving a +2 enhancement bonus on Profession (Cook or related profession) checks. The pan takes one minute to heat itself to a useful temperature. The underside of the pan is magically insulated so that it produces no heat.
Faint; (DC 17) Transmutation;CL 3rd; Craft Wonderous Item Heat Metal; Cost 250gp, 20 XP, 1 Day.; Activation: Standard; Weight: 2 lb.; Market Price: 500gp