Crispy French fries drizzled with peanut butter sauce and chocolate sauce. With side options of caramel and other dessert dips.
Gelato in all stores. I know the one store in Altoona used to have gelato but I haven't seen it in a long time.
MTO desserts could be a great contribution. I always wish Sheetz had desserts. Something like Fried apple dumplings and oreos, or even an ice cream sundae area MTO!