Preheat oven to 350° and line a loaf pan with parchment paper.
In a large bowl, mash the banana really well. Add in the oil and sugar and mix well. Now add in the eggs, and mix until well combined. Add the yogurt and vanilla and mix.
Add the cocoa powder, flour, almond flour, salt and baking soda to the wet ingredients. Mix until there are no clumps. Add in the chocolate chips and mix.
Pour the batter into the loaf pan. Top with a few chocolate chips and a sprinkle of brown sugar. Bake at 350° for 55-65 minutes or until a knife comes out mostly clean.
Let the banana bread cool for 10 minutes and then transfer to a wire rack to continue cooling.
Notes
To make these non gluten free, use regular all purpose flour. To make these as muffins, divide into 12 cups and bake at 350 for 22-25 minutes.