When it comes to the most interesting themed cake I've made thus far, this one takes the cake! It is a microbiology themed cake complete with a microscope, cells, germs, viruses and DNA. One layer is chocolate cake and the other is yellow cake with a hint of almond. They're filled with chocolate buttercream and iced in buttercream with fondant decorations. I hope I succeeded in making germs & viruses look appetizing!