1Heat oven to 400°F. Spray bottoms only of 12 regular-size muffin cups with cooking spray.
2Crush cereal. In large bowl, stir together cereal, flour, brown sugar, cinnamon, baking powder and baking soda. Stir in remaining ingredients just until moistened. Divide batter evenly among muffin cups.
3Bake 18 to 22 minutes or until golden brown. Stir in raisins, if desired.