4bxBettyCrockerPound Cake Mix - Preheat oven to 325ºF. Line a loaf pan with non-stick foil or grease with shortening and dust with flour. Make two cakes. Cut cake into 1-inch thick slices. Place in the freezer for at least one hour. Cut numbers out of cake slices. Place the number pieces back in the freezer. Pour a thin layer of cake mix into the loaf pan. Pour remaining batter into an 18-inch pastry bag. Line the numbers in a single row down the center of the pan, piping batter.