Preheat oven to 350 °F.
Prepare 9”x5” bread pan. Cover with parchment paper and lightly coat with baking spray, dust with flour. Set aside.
Combine together flour, baking powder, baking soda, and cocoa powder. Set aside.
In a separate bowl, mash the bananas. Add the sour cream, oil, vanilla and peanut butter. In a large bowl, cream together butter and sugar. Add in one egg at a time.
Add the banana mixture and combine.
Add in half the flour mixture and whisk together. Add the rest of the flour, mix.
Fold in the chocolate chip morsels, reserving a few tablespoons.
Pour 2/3 of the batter into bread pan.
Add drops of peanut butter over the batter. Gently pour remaining batter over the peanut butter. Add reserved chocolate chip morsels over batter.
Bake 45-55 minutes, or until toothpick comes out clean if inserted into the center of the loaf. (Bake time may slightly vary depending on your oven).
Allow loaf to cool a bit. With a sharp knife, run around the edges of the loaf to release sides.