Angel food cake is a light, spongy cake based on beaten egg whites and sugar (meringue), stabilized with flour. All of the leavening in an angel food cake is supplied by the air that is whipped into the meringue. It is drier than sponge or chiffon cakes because it does not contain any fat. These cakes have a strong structure as well as an unique structure resulting from the lack of fat, which makes them less desirable for use in layer cakes or as a component of any layered, sliced dessert or pastry.