- Roll neatly roll, wrap in 2 layers foil place in any form of. Cook in the oven, slowly raising the temperature from 50-60 to 120-150°C. Cook for about 2 hours.Ready Brawn cool without unwrapping, in foil for about 12 hours. When cooling down, you can press down slightly with a load, so that it is better compressed. I covered it with a chopping Board and put a pot of water on top.