Try one of these unique flavors for your wedding cake. The mocha cake (top left) is flavored with three buttercreams — vanilla, and light and dark coffee — between tiers of dense devil’s food cake. On the bottom layer: a bittersweet-chocolate ganache. White-chocolate pistachio cake (top right) is made with airy layers of pistachio sponge cake nestled in cloudlike white-chocolate mousse layered with pistachio cream, served with a scoop of pistachio gelato. The blackberry buttermilk cake (bottom) is four layers of fruit-studded buttermilk cake and blackberry buttercream are encased in fondant, a decorative sugar paste that helps keep the interior moist.