Angel food cake
Angel food cake needs the egg whites to be whipped until they are stiff, and carefully folded into the other ingredients. For this method of "leavening" to work well, it is helpful to have flour that has been made of softer wheat. This causes angel food cake to have a very light texture and taste.  Angel food cake should be cut with a serrated knife, as a solid blade tends to compress the cake rather than cut it.