Decorate cake. Using ruler and toothpick, mark a horizontal line around the side of the cake, 3 in. from the bottom.
Starting at the bottom of the cake, use tip 1 and white icing to pipe sotas up to the marking, filling in entire bottom portion of cake.
Use bags with tip 1M, tip 4B and tip 21 to pipe rosettes along top edge of sotas. Fill in spaces with tip 352 leaves.