Tom, you mentioned the frosting. I don't know if I know the difference, I'm just repeating what the wrapper said, Marzipan and Royal Frosting. I think Royal Frosting in hard, isn't it? Whatever surrounds it, the cake is DELICIOUS!!! We have managed to make the cake last through today (I think it will be gone later this evening). We have one caterpillar roll left. It is described on the wrapper as a chocolate sponge roll filled with chocolate buttercream and covered in milk chocolate icing with decorated white chocolate faces and sugar coated dark chocolate chips. The cover also has a cartoon picture of a caterpillar. These confections, too, are quite tasty!!! Apparently, they are a birthday tradition with our Nottingham friends so they wanted to pass the tradition on to us. Hmmm, how will I get them next year???