1. Stir together flour, baking powder, soda, salt, granulated sugar and spices. Set aside.
2. In large mixing bowl, beat eggs until foamy. Add pumpkin, brown sugar, oil, milk and KELLOGG'S RAISIN BRAN cereal. Mix well. Add dry ingredients, mixing until combined. Stir in nuts. Spread evenly in 13 x 9 x 2-inch baking pan coated with cooking spray.
3. Bake at 350°F about 45 minutes or until wooden pick inserted near center comes out clean. Serve warm or cooled with whipped topping or ice cream, if desired.