Preheat oven to 350°F. Grease and line a 9x5 inch loaf pan with parchment paper.

Mash 2-3 large bananas in a bowl using an electric mixer. Measure 1 cup of mashed bananas and set aside.

In a large bowl, cream together the softened butter and granulated sugar with an electric mixer.

Add the eggs and vanilla extract, mixing until combined.

Mix in the mashed bananas, followed by the buttermilk.

In a small bowl, whisk together the flour, cocoa powder, baking soda, and salt.

Add the dry ingredients to the wet ingredients and mix until just combined.

Fold in the semi-sweet chocolate chips.

Pour the batter into the prepared loaf pan. Bake for 70-75 minutes, or until a toothpick inserted into the center comes out clean.

Let the banana bread cool in the pan for 20 minutes, then transfer to a cooling rack to cool completely. Sprinkle extra chocolate chips on top if desired.

Serve and enjoy!