1Heat oven to 375°. Line 12 medium muffin cups, 2 1/2x1 1/4 inches, with paper baking cups and spray bottoms with nonstick baking spray.
2Place cereal between waxed paper, plastic wrap or in plastic bag; crush with rolling pin (or crush in blender or food processor). Mix cereal and milk in large bowl; let stand about 5 minutes or until cereal is softened. Stir in remaining ingredients. Divide batter evenly among muffin cups.
3Bake 22 to 25 minutes or until toothpick inserted in center comes out clean. Immediately remove muffins from pan. Serve warm.