Here are all the ingredients you need.
First add the self rising flour.
Next the sugar.
Now the cocoa powder.
And the egg.
And the milk.
Now the nutella!
Now mix with a fork.
Now put it in the microwave on high for 1 1/2 -2 minutes.
It's done but I would use a bigger cup then this one because it kind if over flowed you can also put some whipped cream on it. :)