Grease a loaf pan (I also like to line the bottom of the pan with parchment paper to make sure the loaf doesn't stick).

Mash bananas in a mixing bowl. Add peanut butter, eggs, vanilla, milk, brown sugar, granulated sugar, and cinnamon and stir well to combine.

In a separate small bowl stir together flour, baking powder, baking soda and salt. Add to banana mixture and stir to combine.

Pour into loaf pan and bake at 350 degrees F. for 40-50 minutes or until a toothpick inserted into the center comes out clean.

Allow to cool in the pan for 5-10 few minutes before inverting onto a wire cooling rack.