Preheat oven to 325°F (170°C). Spray an 8 1⁄2×4 1⁄2- inch loaf pan with baking spray with flour. Line pan with parchment paper, letting extra prolong over all sides of pan.
In a medium bowl, whisk collectively flour, cocoa, salt, baking powder, and baking soda.
In a big bowl, whisk collectively banana, brown sugar, oil, bitter cream, eggs, and vanilla. Steadily stir in flour combination simply till mixed. Fold in chocolate chips. Unfold batter into ready pan.
Dip a clear small offset spatula in oil to coat flippantly. Beginning at one quick facet of pan, rating a 3- to 4-inch line lengthwise alongside heart of batter with oiled spatula.
Bake till a wood choose inserted in heart comes out clear and an instant-read thermometer inserted in heart registers 205°F (96°C), 1 hour and 10 minutes to 1 hour and 20 minutes. Let cool in pan for 10 minutes. Utilizing extra parchment as handles, take away from pan, and let cool fully on a wire rack. Garnish with confectioners’ sugar, if desired. Retailer in an hermetic container for as much as 3 days.
