Sift and mix all the dry ingredients ( flour, sugar, cocoa) into a bowl.
In a separate bowl mix the wet ingredients well ( egg, oil, milk, nutella).
Pour the wet ingredients bowl into the dry ingredients bowl, mix with a fork until combined.
Pour mix evenly into 2 mugs with a little room for rising. Pop into microwave for approx 2 mins depending on the wattage of your microwave ( mine is 1100 watts and 2 minutes was perfect for the 2 cups of dessert).
Serve with a scoop of ice cream and enjoy