Instructions: Beat butter at medium speed about 2 minutes. Gradually add sugar, beating at medium speed for 5-7 minutes. Add eggs, one at a time, beating just until yellow disappears.

Combine flour, baking soda, and cocoa; add to creamed mixture alternately with sour cream, beginning and ending with flour mixture. Mix at low speed just until blended after each addition. Stir in vanilla. Spoon batter into a greased and floured 10-inch tube pan. Bake at 325F for 1 hour and 20 minutes or until a wooden pick inserted in center comes out clean. Cool in pan on a wire rack. Sprinkle with powdered sugar, if desired.

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