Mix together the dry ingredients of a package of angel food cake mix and a package of any other flavor cake mix in a covered bowl or plastic storage bag. Then when you want a single serving of cake, mix together 3 level tablespoons of the mix and 2 tablesppons of water in a microwave safe bowl or cup. Microwave for 1 minute. Serve plain or with a dollop of whipped topping, or berries or chocolate syrup, etc.
This really works and is great when you don't want a whole cake sitting around to tempt you !