1. Preheat oven to 400°.
2. Combine all ingredients except cooking spray in a medium bowl; stir just until combined. Spoon batter evenly into 24 miniature muffin cups coated with cooking spray. Bake at 400° for 11 minutes. Spray tops of muffins with cooking spray; bake an additional 2 minutes. Remove from oven; let stand in pan 2 minutes.