Preheat oven to 350 degrees. Line a 8-9 inch loaf pan with parchment or spray with cooking spray.
In a medium sized bowl, whisk together flour, baking powder, baking soda and salt.
In a stand mixer with the paddle attachment (or by hand), beat on the butter and peanut butter until creamy and combined. Add sugar and beat on high until light and fluffy; 1-2 minutes. Add eggs and vanilla and beat on medium speed until well combined.
Gently stir in flour mixture, just until combined. Gently fold in bananas, just until combined, then chocolate and peanut butter chips.
Pour batter into the prepared loaf pan. Top with additional chips, if desired.
Bake in the preheated 350 degree oven for 50-60, or until sides pull away from the pan and a toothpick inserted into the center comes out clean.
Cool completely in the loaf pan on a wire rack. Slice and serve. Store in a sealable plastic bag for 4-5 days.