1 pkg. white cake mix
1 pkg. instant vanilla pudding
1/2 c. oil
1 c. sour cream
2 tsp. vanilla
4 eggs

CINNAMON FILLING:

1/3 c. sugar
1/2 c. chopped pecans
1 tbsp. cinnamon
1 tsp. cocoa

Combine dry cake mix, dry pudding mix, oil, sour cream, vanilla and eggs. Alternate cake mixture with filling in 13x9x2 pan. Swirl through with fork. Bake at 350 degrees for 50-55 minutes.