1. Stir together flour, sugar, baking powder, soda, salt and spice. Set aside.
2. In large mixing bowl, beat eggs until foamy. Add pumpkin, oil and KELLOGG'S ALL-BRAN cereal. Mix well. Add flour mixture, stirring only until combined. Stir in chocolate morsels and nuts. Spread evenly in ungreased 9 x 13 x 2-inch pan.
3. Bake at 350° F about 1 hour and 10 minutes or until wooden pick inserted near center comes out clean. Cool completely before removing from pan. Drizzle with powdered sugar glaze, if desired.
Glaze: Combine 1 cup powdered sugar and 4 teaspoons warm water
The following ingredients combined can be substituted for the 2 1/2 teaspoons of pumpkin pie spice.