For 1 mug
3 tbsp caster (superfine) sugar
4 tbsp Nutella
5 tbsp plain (all-purpose) flour
2 tbsp unsweetened cocoa powder
½ tsp baking powder
1 In a mug, beat in one by one the egg, sugar, Nutella, flour, cocoa and baking powder.
2 Cook in a microwave for 50 seconds (800W). Leave to rest for 1 or 2 mins before eating.