Preheat oven to 350°F. Grease two loaf pans with baking spray. Line bottom of pan with parchment paper. Set aside.
In a large mixing bowl, beat bananas and butter until combined. Add flour, sugar, baking powder, baking soda and salt. Mix until thick and blended.
Beat in eggs, mixing for 1-2 minutes until fully incorporated.
Either add the Nutella now, and swirl it into the batter, or drop large scoops of batter into loaf pans, then add a large tablespoon of Nutella. Swirl and repeat until batter and all Nutella called for is used.
Bake for 60-70 minutes. Remove and cool in pans for 15 minutes.
Turn bread out of pan onto a wire rack and cool completely.
Store in airtight container at room temperature for up to 5 days, or freeze for later use. ENJOY!