Method
Step one
Add four tablespoons of self-raising flour, four tablespoons of caster sugar and two tablespoons of cocoa powder to the largest mug you have (to stop it overflowing in the microwave) and mix.
Step two
Add one medium egg and mix in as much as you can, but don’t worry if there’s still dry mix left.
Step three
Add the three tablespoons of milk, three tablespoons of vegetable or sunflower oil and a few drops of vanilla essence and mix until smooth, before adding two tablespoons of chocolate chips, nuts, or raisins, if using, and mix again.
Step four
Centre your mug in the middle of the microwave oven and cook on High for one and a half to two minutes, or until it has stopped rising and is firm to the touch.
source: express.co.uk