Buttercream icing and fondant accents. I let the fondant pieces dry on a cookie sheet before adding them to the cake, but that was a mistake. I should have made the fondant pieces and added them right away. I used a cobblestone texture mat to make the crocodile texture in the buttercream. I dipped the impression mat in watered down brown food color before pressing it onto the cake. That really added to the texture, I think. Crumpled parchment rolled over fondant makes a great leather texture.