Try the 3 - 2 - 1 cupcake

1 box Angel Food cake mix
1 box cake mix - any flavor

Combine both in a ziploc bag (best w/zip-lock or self seal). Mix well.
Remember that one MUST be angel food cake. And angel food cake has egg whites (in case you have allergies)

Whenever you want a personal cupcake:

3 tablespoons from the mixed cakes
2 tablespoons water
1 minute in the microwave
(Notice why it is called 3 - 2 - 1?)

You can even add fat-free cool whip if you want.