Stir together flour, sugar, baking powder and salt. Set aside.
In large mixing bowl, combine KELLOGG'S ALL-BRAN cereal and milk. Let stand about 2 minutes or until cereal softens. Add egg and oil. Beat well. Add flour mixture, stirring only until combined. Portion evenly into twelve 2 1/2-inch muffin pan cups coated with cooking spray.
Bake at 200° C about 20 minutes or until golden brown. Cool 10 minutes. Serve warm.