I got this recipe from a potluck we had where I live. It's so much easier than the other microwave cakes I've seen.
1 angel food cake mix (type that says "just add water")
1 cake mix (any flavor of your choice...I've made chocolate, red velvet, and strawberry...I need
Mix both mixes together and store in a Ziploc bag or other container.
To make a cake, put 1/3 cup of mix in a coffee mug (safe for the microwave). Add 3 tablespoons of water and mix.
Cook on 100% power for 1 minute (I've found the red velvet takes a little longer...just make sure the cake looks dry and not wet on top).
Flip cake onto a plate and fill mug with water (makes it easier to clean up).
Cake can be served plain or topped however you like it.
Possible toppings: caramel sauce, chocolate sauce, frosting, ice cream, etc.