Preheat oven to 350 degrees Fahrenheit.
Peel ripe bananas and put them in a large mixing bowl, then mash them until creamy.
Add melted butter and granulated sugar to a new bowl; whisk together.
Add eggs and vanilla to the same bowl, and whisk all ingredients together.
Add salt, sour cream, mashed bananas, baking soda, and homemade nutella; combine ingredients.
Stir in and mix together flour.
Add ½ cup chocolate chunks and chopped hazelnuts, folding them into the batter.
Pour batter into a 9x5 loaf pan and top with more remaining chocolate chunks.
Bake for 55-60 minutes or until a toothpick comes out clean. Let cool in pan for 10 minutes and transfer to a cooling rack.
Slice and enjoy!
