Preheat the oven at 450°F with the oven rack inside and meanwhile prep the pizza.
On a working surface sprinkle a little flour and roll out the pizza dough to a round shape and place it on a baking sheet lined with parchment paper.
Poke the flattened dough with your fingers making notches and then brush it with butter.
Bake the dough for about 20 minutes or till it turns golden brown.
Take it out of the oven and spread nutella on it and sprinkle the chocolate chips and once again put it inside the oven for about a minute or till the chocolate melts.
Sprinkle hazelnuts on the pizza or you can even add M&Ms on it and serve hot.