1 c. butter
2 c. sugar
1 c. brown sugar, packed
6 eggs
1/4 tsp. baking soda
1 c. sour cream
2 1/2 c. flour
1/2 c. cocoa
1/2 tsp. salt
2 tsp. vanilla
Powdered sugar (optional)

Cream butter, gradually add 2 cups sugar and brown sugar, beating well at medium speed. Add eggs, one at a time, beating after each addition. Combine soda and sour cream; set aside.

Sift together flour, cocoa, and salt. Add to creamed mixture, alternate with sour cream mixture, beginning and ending with flour mixture. Mix just until blended after each addition. Stir in vanilla. Pour batter into a greased and floured 10-inch tube pan. Bake at 325 degrees for 1 hour and 20 minutes or until wooden pick comes out clean.

Let cool in pan 15 minutes. Remove and let cool completely on wire rack. Sift powdered sugar over top of cake.