Preheat your oven to 350°F (175°C) and grease a loaf pan with olive oil or non-stick spray.

In a medium mixing bowl, whisk together the dry ingredients: flour, cocoa powder, baking soda, salt, and espresso powder.

In the bowl of a stand mixer, combine olive oil and both sugars and beat until smooth, then add eggs one at a time, followed by vanilla and sour cream.

Gently fold in the mashed bananas into the wet mixture.

Slowly fold the dry ingredients into the wet mixture until just combined.

Dredge the chocolate chips in flour and fold them into the batter.

Pour the batter into the prepared loaf pan and optionally top with sliced bananas.

Bake for 55-65 minutes, checking with a toothpick for doneness.

Let the loaf cool in the pan for 20 minutes before transferring to a wire rack.