Remove weights and foil. Spread a thin layer of frosting against the 3-1/2-inch side of one of the stacks, and join stacks to make a triangle. Carefully transfer cake to serving platter using wide spatulas. Spread remaining frosting over the cake. Arrange crystallized violets down sides and peak of cake, if desired. Slice with an electric NOTE: The slicing technique for Chocolate Triangle Cake is tricky but we think you'll be proud of the end result. Two layers are stacked on top of each other; then they're sliced into seven strips of varied widths. The strips are frosted and stacked by graduated sized into two halves of a triangle. The stacks are weighted down to compress the layers and make them adhere; then they're joined into a triangle and frosted. A garnish of crystallized violets finishes the cake beautifully. ----