Judy/Buffalo newsletter dated 9/2/2009. This is the recipe I have for Mug Cake using cake mixes, hope this is the ones you are looking for.

Mug Cake using Cake Mixes
Recipe: at a ratio of 1 serving of Dry cake mix to 1/2 serving of water and mix, add the special sauce or ingredient of your choice, swirl it through cake mix several times. Top with the final topping (chocolate syrup, etc.), bake in microwave oven for just seconds. Here are samples that I have tried: 1/2 cup Dry chocolate cake mix, 1/4 cup water, mix until smooth. Drop a heaping tablespoon of canned chocolate fudge icing and swirl through cake mix. Top with marshmallow syrup ( a jar of marshmallow cream that I dilute with several spoons of water and stir till it will pour) Bake in microwave for approximately 55-65 seconds. 2. 2/3 cup yellow cake mix. 1/3 cup water, mix until smooth. Drop in sweetened coconut, swirl. Top with marshmallow syrup. Bake in microwave for 60-75 seconds. The only thing tricky is about this is to remember that whatever measurement of cake mix you use, be sure to use 1/2 that same measurement of water. Be sure your cooking dish or cup will hold the amount of cake (it rises and can run over) and watch the baking time. Different amounts and different sauces can cause it to need a few seconds more of less of baking time. Test your cake with a skewer and check your cooking time in seconds not minutes. A regular 8oz coffee cup is NOT large enough!!! Enjoy Elle/Oceano, CA

http://www.nancyskitchen.com