1 c. butter
2 c. sugar
1 c. brown sugar
6 lg. eggs
2 1/2 c. all-purpose flour
1/4 tsp. baking soda
1/2 c. cocoa
1 (8 oz.) carton sour cream
2 tsp. vanilla extract

Cream butter at medium speed 1 minute. Add sugar - add egg. Combine dry ingredients alternating with sour cream. Stir in vanilla. Use 10 inch tube pan. Bake at 325 degrees for 1 hour.