I originally saw this over on a fellow bloggers blog: http://www.emmysmummy.com/2012/05/nutella-mug-cakes-in-5-minutes.html
And thought I had to make these! After looking on fellow google there is quite a few recipes and one without eggs ( which was good as we haven't got any in) hehe.
2 tbsp plain flour
2 tbsp sugar
1 tbsp cocoa power
1 tbsp vegetable oil
2 tbsp water
Pinch of salt
We also added a few chocolate chips.