Step 1

Preheat the oven to 350 degrees. Line a 12 cup muffin tin with liners and set aside.

Step 2

In a bowl combine the flour, the baking powder, and the salt. In a mixing bowl, cream together the butter and the sugars until fluffy. Beat in the eggs, the bananas, and the vanilla until smooth. Slowly add in dry ingredients until blended. Stir in the hazelnuts.

Step 3

Divide the batter between the muffin tins. Place a dollop of Nutella on each muffin and swirl with a knife. Bake muffins for 22-25 minutes or until a toothpick inserted comes out clean.