Make layered cake. Prepare batter following recipe directions. Bake and cool cakes. Prepare buttercream icing following recipe directions. Tint portion red. Reserve remaining white. Torte, stack and fill for a 4-layer, 4 in. high cake.
Decorate cake. Use spatula and white icing to ice cake smooth. Use plastic ruler and toothpick to mark four strips, each approximately 7/8 in. high with 1/4 in. space between each strip.
Use tip 2, cut disposable decorating bag and red icing to pipe Cornelli lace in space marked for each cake layer.
The random lacy design of this free-form technique depends on the continuous curving lines that do not overlap or touch. Can be used in a small design area or on an entire cake surface. Good for wedding, anniversary and other formal event cakes, but lends itself to more casual themes, as well.