I can make it too (I've made a Nintendog papercraft for my sister, a Prince papercraft from the Katamari series, and a creepy dragon thing that watches you), but I don't think I can print it out. I'll ask my dad when he gets home. biggrin
EDIT: If you really want the cake, you can always play Portal: The Flash Version. In this one, GLaDOS isn't evil, and there really is a cake, though it looks totally different than the cake. <_<