Heat your oven to 350 degrees Fahrenheit.
Peel those ripe bananas and toss them into a large mixing bowl, then mash them until they’re creamy.
In a new bowl, whisk together the melted butter and granulated sugar.
Add eggs and vanilla to the same bowl, whisking everything together.
Into this bowl, add salt, sour cream, mashed bananas, baking soda, and homemade Nutella, combining all the ingredients.
Stir in the flour and fold in 1/2 cup of chocolate chunks and the chopped hazelnuts.
Pour this delightful batter into a 9×5 loaf pan and generously top it with the remaining chocolate chunks.
Bake for 55-60 minutes or until a toothpick inserted comes out clean. Allow it to cool in the pan for 10 minutes before transferring it to a cooling rack.
Slice it up and relish the goodness!