There are two major options for designing a Halloween wedding cake:
The first option is appropriate for a wedding reception that incorporates the Halloween theme in other ways, such as with Halloween music, favors and decorations or perhaps is even a costume party. The cake could be funny or elegant. Not sure how to obtain elegance with a Halloween themed wedding cake? Well elegance could be achieved by decorating the cake in such a way that the Halloween theme and Halloween elements come alive while making sure it still looks like a beautiful wedding cake.
Need some examples? You could have a tiered cake with an orange frosting trimmed in black lacey decorative frosting, or you try a chiffon yellow frosting with trailing green pumpkin vines and orange pumpkins. Another option would be to decorate a white frosted cake with orange rosebuds or arches.
Are you looking to inject some humor and good natured fun into your cake? A funny cake that totally incorporates the Halloween theme could be a tiered Halloween wedding cake which is designed to be in the shape a character or Halloween object. Some objects that would work well include pumpkins, jack-o-lanterns, a pair of Halloween masks, or a ghost. A tiered cake could very easily be designed to look like candy corn; a bit more creativity might yield a haunted mansion or witchs cauldron.
A sheet cake has so many possibilities. Any Halloween scene could be portrayed here, from ghosts and ghouls to Peanuts characters awaiting the Great Pumpkin. It could also be cut in tombstone or pumpkin shapes. A sheet Halloween wedding cake could be made into just about any type of Halloween picture you want to portray.
Subtlety is the second direction to take in designing a Halloween wedding cake: In this case, choose accents to be added to a beautiful, traditional wedding cake. Consider the cake topper the bride and groom could be Dracula and his Bride, mummies, skeletons, or Frankenstein and his bride. Using creative cake toppers is a great way to add any theme into your wedding, without it bearing too overdone.
Perhaps you want to use the cake to say happy Halloween to your guests. Or perhaps a slightly contrasting frosting color could be used to ask, Trick or Treat? or to trace cobwebs and spiders, cats or witches. Yet more subtle would be discovering a hidden Halloween theme once the cake is cut there might be orange swirl throughout the cake, or colored frosting between layers.
One further option that has been gaining popularity is to use a tiered cupcake arrangement. Once again, thedecorations might be vivid or subtle, funny or elegant. This option would allow using Halloween themed cupcake liners in addition to frosting colors and decorations.
In any case, the tone of the reception and the reasons behind choosing a Halloween wedding cake must inform the choices. That said, imagination can take this idea to all kinds of beautiful, funny, even spooky heights. Try choosing a howling werewolf or the one-eyed purple people eater song for the cutting of the funnier cakes, or an intense organ fugue in a minor key to go with an elegant one.