1 pkg. (18.25 oz) yellow cake mix
1/2 c. white sugar
3/4 c. vegetable oil
4 eggs
1 c. chopped pecans
1 tsp. vanilla extract
1 c. sour cream
1/2 c. packed brown sugar
1 tbsp. ground cinnamon

Preheat oven to 350°F. Mix together cake mix, sugar, oil, eggs, pecans, and vanilla. Fold in the sour cream. Put half the batter in a bundt pan. Mix the brown sugar and cinnamon and sprinkle over the batter in the pan. Pour remainder of the batter on top.

Bake for 70 minutes until cake tests done.