This hits the spot when you are craving a yummy dessert but don't feel like putting in the effort to make something complicated. I haven't tried it with any other type of mix but I imagine it works just as well.
Combine cake mix and baking powder into a microwaveable mug. Use a mini whisk to break up any clumps.
Add water and whisk together completely. Mixture will be pretty thick.
Microwave for 1 minute on high. Check doneness. If cake mix is still shimmery, microwave for an additional 10-20 seconds. Microwaves vary so test and tune for what works.
Optional add ins: chocolate chips just before nuking, chocolate syrup just before serving, whipped cream.