Combine first 6 ingredients in a medium bowl; make a well in center of mixture. Combine milk and next 8 ingredients (milk through egg); stir well with a whisk. Add to flour mixture, stirring just until moist. Spoon batter into 18 muffin cups coated with cooking spray. Sprinkle turbinado sugar evenly over batter.
Bake at 400° for 18 minutes or until done. Remove from pans immediately, and cool on a wire rack.