- cooking spray
- 4 bananas, mashed
- 1/4 cup brown sugar
- 2 eggs
- 2 tablespoons olive oil
- 2 teaspoons vanilla extract
- 2 1/2 cups whole wheat flour
- 1/4 cup cocoa powder
- 1 teaspoon baking powder
- 1 teaspoon ground cinnamon
- 1/4 cup chocolate chips
- 1/4 cup chopped walnuts (optional)
- Preheat oven to 350 degrees F (175 degrees C). Spray a 12-cup muffin tin with cooking spray.
- Mix mashed bananas and brown sugar together in a large bowl. Add eggs, olive oil, and vanilla extract; mix well.
- Mix flour, cocoa powder, baking powder, and cinnamon in a separate bowl. Stir banana mixture into flour mixture. Fold chocolate chips and walnuts into batter. Distribute batter into the muffin cups.
- Bake in the preheated oven until a toothpick inserted in the center of a muffin comes out clean, 35 to 40 minutes.