For his 4th birthday, my son wanted an elk cake to go with his hunting theme birthday party. We used a 9×13 sheet cake for the base, and grass part. We used a Wilton lamb pan for elk part. We reoriented the head, so that the back of the cake would balance the antlers, which we made out of chocolate twizzlers.
I made regular buttercream frosting for the grass. The elk tan part was peanut butter frosting. I added some chocolate syrup to the PB frosting for the dark brown parts.