In a mug mix:
1/4 cup plain flour
2 tablespoons sugar
1/4 teaspoon baking powder
2 tablespoons cocoa
small pinch salt
Add
1/4 cup and 1 tablespoon milk
2 tablespoons oil
Mix all ingredients with a spoon until batter is smooth.
Microwave on HIGH for 65 seconds for a nice sloppy mug cake or for 85 seconds for a firmer cake (1200Watt microwave).
You can even add a group of chocolate drops in the centre for a decadent chocolate core.
Enjoy!