Preheat oven to 400°.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour, oats, and next 6 ingredients in a large bowl; stir well with a whisk.
Combine banana and next 4 ingredients in a medium bowl, and stir well with a whisk. Add to flour mixture, stirring just until moist.
Spoon batter into 12 muffin cups coated with cooking spray; sprinkle evenly with coconut.
Bake at 400° for 20 minutes or until golden brown.
Remove muffins from pan immediately; cool on a wire rack.