I made a Zombie cake this weekend! I had a blast making this one. The cake itself was a half sheet size. I used dark chocolate cake filled with chocolate fudge, and frosted with silky smooth chocolate italian meringue buttercream. The "dirt" on top of the cake was made with finely crushed oreo cookies, partly for aesthetic appeal and also because the birthday boy loves and requested oreo cookies in his cake. I was very pleased with the way it urned out. By the way, it took almost an entire bag of oreos to get enough crumbs to cover the entire top of the cake!
The hands, face, and eyeballs were made with rice crispy treats covered in fondant. The eyeballs were hand painted, and the brain was piped on using buttercream and hand painted with watered down red gel colors.