1 pkg. yellow cake mix
1 c. sour cream
4 eggs
1/2 c. oil
1 pkg. (4 serving size) vanilla instant pudding
2 tsp. vanilla
1/3 c. sugar
1 tsp. cocoa
1 tsp. cinnamon
1/2 c. chopped nuts

Combine dry cake mix, sour cream, eggs, oil, pudding mix and vanilla in large mixer bowl. Beat 4 minutes at medium speed. Turn 1/2 of batter into greased and floured 10" tube pan. Combine sugar, cocoa, cinnamon and nuts. Sprinkle 1/2 of this mixture over batter in pan. Add remaining batter and sprinkle with remaining topping. Bake at 350 degrees for 50 to 55 minutes. Cool cake completely on rack before removing from pan.