A cake is done when the sides shrink back slightly from the side
of the pan (except sponge and chiffon cakes, which cling tightly to the pan),
when the top springs back when lightly pressed with fingertips, or when a cake
tester or toothpick inserted in the center of the cake comes out clean.
TIP: Spray the cooling racks with vegetable-oil cooking spray to
help prevent the cake from sticking to it when cooling.
Before storing, be sure cake is completely cool; they will become
sticky if covered while warm. It takes approximately 2 hours for a cake to cool
completely. Store cakes in a container with a tight cover or invert a large bowl
over the cake to keep it fresh and moist for several days. All cakes containing
dairy products, including cream cheese, in the filling or frosting must be
refrigerated.