So... I used white chocolate chips which made the cake look a little bit funny... especially because they are all at the bottom. Don't know how to help the problem.
Overall, it needs a bit of tweaking. It didn't have too much flavor but with chocolate sauce I'm sure it'd be great.
4 tablespoons flour
4 tablespoons sugar
2 tablespoons cocoa
1 egg
3 tablespoons milk
3 tablespoons oil
3 tablespoons chocolate chips (optional)
A small splash of vanilla extract
1 large coffee mug (MicroSafe)
Add dry ingredients to mug, and mix well. Add the egg and mix thoroughly.
Pour in the milk and oil and mix well..
Add the chocolate chips (if using) and vanilla extract, and mix again.
Put your mug in the microwave and cook for 3 minutes at 1000 watts.
The cake will rise over the top of the mug, but don't be alarmed!
Allow to cool a little, and tip out onto a plate if desired.
EAT ! (this can serve 2 if you want to feel slightly more virtuous).