CAKE:

1 box yellow cake mix (without pudding in the mix)
1 box instant vanilla pudding (4 servings size)
1/2 c. sour cream
4 eggs
2 tsp. vanilla
2/3 c. oil

TOPPING:

1/2 c. sugar
2 tsp. cinnamon
1/2 c. chopped nuts

Grease and flour Bundt pan. Put all cake ingredients in large mixing bowl. Beat on medium speed for 4 minutes. In a separate bowl, combine topping ingredients. Pour 1/2 cake batter in prepared pan. Swirl in 1/2 topping. Add rest of batter. Swirl in rest of topping. Bake at 350 degrees for 60 minutes. Cool 10 minutes and remove from pan.