Brownie in a cup!
In a mug/microwave safe cup mix the following, starting with the liquids:
2 Tbs water
2 Tbs vegetable oil
4 Tbs flour
4 Tbs sugar
2 Tbs cocoa powder
Microwave for 90 seconds (or less, depending on your gooey preference). And that's it! :)
See Emorie's original post here. This also may be an appropriate time to admit I have a serious addiction to anything sweet. Just the other day I discovered Nutella tastes delightful spread on graham crackers. Somebody stop me.