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Preheat your oven to 350°F (175°C). Line a 9x5 inch loaf pan with parchment paper, leaving an overhang on the long sides to easily lift the bread out later.

In a large bowl, whisk together the melted butter, granulated sugar, and light brown sugar until well combined. Beat in the eggs one at a time, then stir in the vanilla extract and sour cream until smooth.

In a separate medium bowl, mash the ripe bananas thoroughly with a fork until mostly smooth with a few small lumps remaining. Add the mashed bananas to the wet ingredients and mix until just combined.

In another medium bowl, whisk together the all-purpose flour, unsweetened cocoa powder, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing with a spatula until just combined. Be careful not to overmix; a few streaks of flour are okay. Fold in 1 cup of the semi-sweet chocolate chips.

Pour the batter into the prepared loaf pan and spread evenly. Sprinkle the remaining 1/2 cup of chocolate chips over the top of the batter.

Bake for 55-65 minutes, or until a wooden skewer inserted into the center comes out with moist crumbs, but no wet batter. If the top starts to brown too quickly, you can loosely tent it with aluminum foil.

Remove the loaf from the oven and let it cool in the pan for 10-15 minutes. Then, use the parchment paper overhang to lift the bread out of the pan and transfer it to a wire rack to cool completely before slicing and serving.


Preheat your oven to 350°F (175°C). Line a 9x5 inch loaf pan with parchment paper, leaving an overhang on the long sides to easily lift the bread out later.

In a large bowl, whisk together the melted butter, granulated sugar, and light brown sugar until well combined. Beat in the eggs one at a time, then stir in the vanilla extract and sour cream until smooth.

In a separate medium bowl, mash the ripe bananas thoroughly with a fork until mostly smooth with a few small lumps remaining. Add the mashed bananas to the wet ingredients and mix until just combined.

In another medium bowl, whisk together the all-purpose flour, unsweetened cocoa powder, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing with a spatula until just combined. Be careful not to overmix; a few streaks of flour are okay. Fold in 1 cup of the semi-sweet chocolate chips.

Pour the batter into the prepared loaf pan and spread evenly. Sprinkle the remaining 1/2 cup of chocolate chips over the top of the batter.

Bake for 55-65 minutes, or until a wooden skewer inserted into the center comes out with moist crumbs, but no wet batter. If the top starts to brown too quickly, you can loosely tent it with aluminum foil.

Remove the loaf from the oven and let it cool in the pan for 10-15 minutes. Then, use the parchment paper overhang to lift the bread out of the pan and transfer it to a wire rack to cool completely before slicing and serving.
