Chocolate Pound Cake with Butter Cream Frosting

Cream butter and margarine until smooth, add sugar and beat until light and fluffy. Add eggs, one at a time, beating well after each addition. Combine dry ingredients, and add to creamed mixture alternately with milk and vanilla. spoon batter into a well-greased 10 inch tube pan or Bundt pan. Bake at 325 degrees for 35 minutes, reduce heat to 200 degrees and bake an additional 35 to 40 minutes. Cool, spread with Butter Cream Frosting, and decorate as desired. Butter Cream Frosting: Cream margarine and cream cheese until light and fluffy. Add salt and sugar, a small amount at a time, beating until smooth. Slowly beat in just enough milk to make mixture spreadable, add vanilla.