Chocolate-Chocolate Chip Sourdough Banana Bread

Instructions

1. Pre-heat oven to 350°F.
2. Lightly grease 1 large loaf pan or three mini loaf pans with butter or spray with baking spray.
3. Sift together flour, baking soda, salt, and cocoa powder into a bowl and stir to mix them thoroughly.
4. In the bowl of a stand mixer using the paddle attachment, add the butter and sugar and beat until light and creamy, about three minutes.
5. Add the egg and vanilla and continue beating until fully incorporated. 
6. In another bowl, mash the bananas, then stir in the sourdough starter.
7. Add the banana/starter mixture to the butter mixture and mix together at low speed.
8. Then slowly add the dry ingredients.
9. Don't over-mix.
10. Finally, slowly add the chocolate chips and mix until incorporated.
11. Pour the batter into the loaf pans and place the mini loaf pans, if using, on a baking sheet to make getting them in and out of the oven easier. 
12. Bake for 45 minutes (mini loaf pans) to an hour (1 large loaf pan).
13. Use a cake tester or toothpick to insert into the center. If it comes out clean, the bake is done.
14. Remove from the oven and let rest in the loaf pan on a rack for 10 minutes, then carefully remove the breads from the pan and place on the rack to completely cool.