Heat oven to 350°F. Spray ... Spread with Buttercream Frosting to within 1/4-inch of edge. ... seal in crumbs. Frost side and top of cake. ... to 2 3/4 cups.
Mix confectioners sugar and salt. ... milk to thin frosting, if needed for good spreading consistency. Frosts two 8 or 9 inch ... Duncan Hines spice cake.