In a large bowl, combine the 2 cake mixes. Whisk until the two mixes are well blended together. Store mix in an airtight container.
Notes
To make the cake: Add 2 Tbsp of water to the bottom of a mug. Then add 3 Tbsp of the cake mix. Mix together with a knife. Place mug in the microwave and cook for 45 sec to 1 min. Eat the cake hot from the microwave or allow to cool and serve with fresh raspberries and sweetened whipped cream (that is the way I like it).