Preheat your oven to 350°F. Grease a loaf pan or prepare with parchment paper,
In a medium bowl or the bowl of your stand mixer, mash the bananas. Add melted butter and oil and mix until combined.
Mix in the brown sugar, egg, and vanilla extract. Mix until smooth.
Add the flour, cocoa powder, baking soda and salt. Mix until combined. Fold in ¾ cup of chocolate chips.
Pour the batter into the prepared pan. Add the remaining chocolate chips to the top of the loaf.
Bake for 60 to 75 minutes, or until a fork inserted in the center of the bread comes out clean. You may have some melted chocolate chips on the fork, that’s fine. Oven times will vary.
Remove the pan from the oven and set on a wire cooling rack. Let the bread cool before serving.
Notes
This recipe is sourdough discard friendly, if you have some discard to use up.