4 tablespoons flour
4 tablespoons sugar
2 tablespoons cocoa
3 tablespoons oil
3 tablespoons milk
* I used 2 tablespoons oil and 4 tablespoons skimmed milk (still 6 tablespoons of liquid, but a tiny bit healthier :))
mix it all together and pour into a greased mug
microwave for 3 minutes in a 1000 watt microwave oven
As the cake cooks, the whole thing swells and rises out of the mug - that's normal so don't panic if it looks like it wants to explode.
Wait until the cake drops right back into the mug before you remove it from the microwave.
This is what it looks like...