Preheat the oven to 350 degrees. Spray a loaf pan with cooking spray.

In a medium bowl combine the flour, baking powder, baking soda, and salt. Mix and set aside.

In a large bowl cream the sugar and butter. Add in the eggs and beat well.

Stir in the bananas, applesauce, and vanilla and mix until smooth.

Stir in the flour mixture to the butter mixture.

Pour the banana bread mixture into the prepared pan.

Place dollops of chocolate hazelnut spread on top of the banana bread mixture. Using a butter knife and swirl the chocolate hazelnut spread into the banana bread.

Bake for 1 hour. Remove from the oven and cool in the pan for 10 minutes. Run a butter knife around the edges of the bread and remove from the pan. Cool on a wire rack.