- Preheat oven to 350°F. Lightly coat an 8- by 4-inch loaf pan with cooking spray.
- Using a whisk or electric mixer, combine the banana, oil, sugar, egg, vanilla and sour cream in a large bowl until smooth.
- In another bowl, combine both flours, baking powder and baking soda. With a wooden spoon, stir the dry mixture into the banana mixture until the dry ingredients are just moistened. Fold in the chocolate chips.
- Pour into the prepared pan and bake for about 30 to 35 minutes or until a tester inserted in the middle of the loaf comes out clean. Let the loaf cool in the pan on a wire rack before removing loaf and slicing into 8 slices.
Nutritional value per serving: Calories 127; Protein 1.6 g; Carbohydrates 19 g; Fibre 0.8 g; Total fat 5.3 g; Saturated fat 1.2 g; Cholesterol 15 mg; Sodium 81 mg