Preheat the oven to 350°F (180°C). Lightly grease a 9” x 5” (23cm x 13cm) loaf pan. Line the bottom and sides with butter paper.
In a bowl mix flour, cocoa powder, salt, baking powder and baking soda.
In a small bowl, mash the ripe bananas with a fork or beater.
In a large bowl, using an electric handy mixer, mix butter and sugar together until creamy. Add eggs and mix well. Add vanilla extract in the mashed bananas.
With mixer on low speed or with the help of spatula add the flour mixture from step2. Add and stir chocolate chips.
Pour the batter into the prepared pan and sprinkle with chocolate chips on top. Bake for about 50-60 minutes or until a toothpick inserted into the center comes out clean. Let bread cool in pan for 10 minutes and then cool completely onto a cooling rack or just enjoy the hot slices.