Peanut Butter Mug Cake

One of my guilty pleasures has to be the nutella mug cake, it is delicious and really satisfies that craving for cake that I seem to always have come the evening time. However it isn't exactly the healthiest thing to eat. I wanted to come up with something that would be just as tasty but wouldn't leave me feeling as guilty after consuming it. I came up with the peanut butter mug cake.

Ingredients

* 4 tbsp wholemeal self raising flour
* 4 tbsp caster sugar
* 3 tbsp cocoa powder
* 3 tbsp sunflower oil
* 3 tbsp semi skimmed milk
* 1 large egg
* 2 tbsp crunchy nut peanut butter