Beat with electric mixer:

1 box Duncan Hines yellow cake mix
1 c. sour cream
4 eggs
1 box vanilla instant pudding
1/2 c. salad oil
1 tsp. vanilla

Beat for 2 minutes. Pour into greased and lightly floured 13"x9"x2" pan.

TOPPING:

1 tsp. cinnamon
1/2 c. white sugar
1/2 c. chopped nuts (opt.)
2 tbsp. melted butter

Sprinkle topping over cake. Bake at 350 degrees for 30 to 35 minutes.