Disclaimer: I haven't actually made this cake, but I saw the recipe in last week's food section and it sounded great. And unbelievably easy.
1 box angel food cake mix
1 box any other flavor cake mix
Combine the two mixes in a gallon-size self-sealing plastic bag. Place 3 tablespoons mix in a microwave-safe one-serving bowl or cup. Add 2 tablespoons water; mix. Microwave on high for 1 minute. Top with frosting, powdered sugar or chocolate chips. You have enough mix to make as many servings as you like.