The best place to cook would have to be in the rogue's den at Burthorpe. I don't believe there are any requirements to get in, just tele to Burthorpe's Games Room using Games Necklace and run out front of the Castle, go to the pub to the east. In the pub, behind the counter there will be a trapdoor. Go in there and there you are! There is a perpetual fire in there with Emerald Benedict for banking who can be a step away at times!