Doughnut with NUTELLA ®
With the help of a whip mounted butter (which you have previously softened in the microwave) with sugar, until it will be white and fluffy. Then add to the mix the beaten eggs, uniting them little by little and blend in with a hand whisk: pour a little 'egg and then a bit' of flour sifted with baking powder, going on and off; In fact it is important to alternate the eggs in the flour and baking powder, so that the dough does not disassemble.
Grease and flour a ring mould, then pour the mixture. Bake the cake in a preheated oven at 180 ° C for 30 minutes. However, check the cooking with a toothpick.
Let cool the donut before throw. Cut the donut in half and stuff it with Nutella®.