Mix the 2 boxes of cake mixes together (shake them in a big bowl). Then simply store the mixture in an airtight container until you get the urge for dessert. Then just put three Tbsp. of the dry mixture in a big coffee mug and stir in 2 Tbsp of water. Microwave it for one minute and you will have a single serving of cake! Top with fruit, ice cream, whipped cream or whatever! Awesome for those of us who want something sweet every now without making an entire cake!!!