I broke apart a chocolate and yellow cake then mixed that together with Instant vanilla pudding (any flavor will work) and pressed the cake into the pan then placed white sandwich cookies that I processed in a blender on top reserving enough to color green and sprinkle on top of the cake for the "Litter" . Tootsie rolls that had been melted and "shaped" were placed in and on the cake. Its a lot of fun and great for your favorite vet