I'm attempting a cake shaped like a pirate ship where you cut a round cake up and assemble it. I've done a practice version. The recipe says to melt cooking chocolate and cover the cake in it. I have silver spoon cooking chocolate flavoured cake covering which says it should be exactly what I want, but when I melt it, it's really runny and so instead of a nice thick layer on the sides of the cake, it runs off into a crappy thin layer and you can see chocolatey sponge instead of a nice shiny chocolate layer.
Has anyone got any suggestions? Would dairy milk be better?