Preheat the oven to 340°F (171°C). Spray an 11x5 loaf pan with cooking spray or lightly butter it. For easy removal, I like to line the pan with parchment paper, leaving extra paper hanging over the sides.
In a medium bowl, sift together the flour, baking soda, baking powder, cocoa powder, and cinnamon. Set aside.
In a large bowl, whisk together the oil and brown sugar until a thick paste forms. Add the vanilla sugar, eggs, and mashed bananas. Stir until combined and the mixture is smooth.
Transfer the dry ingredients to the bowl with the wet ingredients and mix until no streaks remain. Gently fold in the chocolate chips.
Pour the batter into the prepared loaf pan and sprinkle chocolate chips evenly over the top.
Bake the banana bread for 60 minutes, or until a toothpick inserted into the center of the loaf comes out clean. Remove the bread from the oven and let it cool in the loaf pan for at least 10 minutes. Carefully transfer the loaf to a wire rack to cool completely before slicing. Use a serrated bread knife to slice and serve. Enjoy!
Notes
Don’t overmix the batter. Mixing too much can lead to dense, dry banana bread. Stir just until combined for a light, moist loaf.
Don’t overbake. Remove the bread from the oven when a toothpick inserted into the center comes out clean or with just a few crumbs.
Let the bread cool completely before slicing. This ensures the bread holds together better and gives you clean, even slices.