I ran into a couple of places that had chocolate pudding as a choice too.
I'm pretty sure a popsicle/freeze pop was also a choice at one place we went. This same place also offered Mickey head ice cream bars as a choice for adults and I don't remember seeing them as a choice anywhere else on the adult menu.
A few times I traded with the kids so they could have a little variety in the dessert department. I'd order the cookie and save it for later and give them my cake, yogurt, etc.