Increased moisture will heat

An area of a food where there is increased moisture will heat more quickly than other areas. So, when heating up a jelly roll, for instance, its a good idea to let the food stand after cooking for a minute or two until the heat disperses from the high moisture jelly to the low moisture pass throughout. To promote uniform cooking recipes for microwave ovens usually include directions such as turn the food midway through cooking and cover and let stand after cooking.