The flavors of orange and vanilla play so nicely with chocolate that combining all three yields a lovely taste experience. Sophisticated yet subtle, this chocolate creamsicle ombre Halloween cake is sure to be the hit of your adult Halloween party! The cake base is Hershey's perfectly chocolate chocolate cake with quite a number of modifications. If you'd like to use the original recipe, it's on the back of all their cans of cocoa powder, and here's a link.