Combine first 8 ingredients in a large bowl, and make a well in center of mixture.
Combine banana and next 7 ingredients (banana through egg) in a bowl, and add to flour mixture. Stir just until moist. Spoon batter into 18 muffin cups coated with cooking spray.
Bake at 400 for 18 minutes or until done.
Remove from pans immediately, and cool on a wire rack.