Double Chocolate Chip Banana Bread

From King Arthur catalog
 1 cup (4 ¼ oz) AP flour
1 tsp baking soda
¼ tsp salt
2 T cocoa powder
4 oz (1 stick) unsalted butter, softened
½ cup (3 ½ oz) sugar
1 large egg
1 tsp vanilla extract
1 cup (8 oz) mashed banana (about 2 medium bananas)
½ cup (4 oz) sour cream
1 cup (6 oz) semisweet chocolate chips, mini preferred

 1. Preheat oven to 350 degrees F. Lightly grease two 3 ¼’ x 5 ¾” pans, or one 9” x 5” loaf pan. (This made 3 small loaves for me.)

2. Combine the flour, baking soda, salt, and cocoa.

3. In a separate bowl, beat the butter and sugar until light and creamy. Beat in the egg, then stir in the vanilla, banana, and sour cream. Gently mix in the dry ingredients and chocolate chips until well incorporated.

4. Pour the batter into the pan(s) and bake for 45 minutes (smaller loaves) to 60 minutes (large loaf) until a cake tester or toothpick inserted into center comes out clean.

5. Remove bread from oven and allow to rest in pan(s) for 10 minutes. Turn the bread(s) out onto a rack and cool completely.