1 pkg. yellow cake mix
1/2 c. sugar
3/4 c. oil
1/2 pt. (1 c.) sour cream
4 eggs
1 c. chopped pecans
1 tsp. vanilla

Mix first 3 ingredients and add the eggs, one at a time. Mix and add sour cream, vanilla, and pecans; mix well. Grease and flour a bundt pan or tube pan. Add 1/2 the cake batter and sprinkle on a mixture of 2 tablespoons brown sugar and 2 teaspoons cinnamon. Add the rest of the batter, being sure to cover the brown sugar-cinnamon mixture. Bake 1 hour at 350 degrees.