The classic American layer cake is dressed up with geraniums for an informal wedding. Use your favorite devil's food cake recipe combined with our favorite old-fashioned chocolate frosting for this delicious cake. The soft frosting is made of semisweet chocolate chips, heavy cream, and corn syrup. It is spread on the cake in broad strokes that require no special decorating skills. The fanciful, broad playfully echo the frills of the edges of the flowers. Vibrant geraniums are secured in floral foam in trays around the tiers. The number of geranium blossoms that you need will vary, depending on the size and variety of plants. Use flowers with no chemicals or pesticides, and remove them before serving.