MINUTE CHOCOLATE MUG CAKE   1 Coffee Mug4 tablespoons flour (that's plain flour, not self-rising)4  tablespoons sugar2  tablespoons baking cocoa1  egg3  tablespoons milk3  tablespoons oil3  tablespoons chocolate chips  (optional)Small splash of vanilla  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, 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 share!)