Here in Wisconsin (aka Americas' Dairyland), we have a frozen custard stand on almost every block. (Of course, around here pretty much everything is frozen...but I digress). The two primary ingredients of frozen custard are cream and eggs...neither of which will be found on the ingredients list for the fake stuff that oozes from their machine posted earlier in this thread.
While NCL doesn't purport to call their goopy mess frozen custard, the fact that they attempt to pass it off as some sort of a dairy product at all is absurd.