Stir together KELLOGG'S ALL-BRAN cereal, flours, baking powder and salt. Set aside.
In large mixing bowl, beat together oil, egg and sugar. Stir in vanilla and water. Add cereal mixture, stirring until well combined. Stir in chocolate morsels.
Spread evenly in 13 x 9 x 2-inch baking pan coated with cooking spray.
Bake at 350° F about 30 minutes or until golden brown. Cool completely before seving.