Sift sugar and cocoa together into a large bowl. In another bowl combine 1 cup of sugar mixture with butter and 1 tablespoon cream, beating until smooth. Add another cup of sugar and another tablespoon of cream, beating well. Continue until all ingredients are combined and frosting is fluffy. Beat in vanilla. Spread frosting on top of one round. Top with second round and cover top and sides completely with frosting.
Recipe Courtesy of Food Network Kitchens