Preheat oven to 350. Grease 2 10 by 3 by 9-inch cake pans or cupcake molds. Cream butter and sugar. Add cocoa and cream. Add eggs, one at a time, creaming well after each addition. Sift together dry ingredients. On first speed, add dry ingredients in three stages, alternating with water, beginning and ending with dry. Mix only until well blended- do not overmix. Pour into prepared pans and bake 35 to 45 minutes or until done. Cool in pan before turning out.