I agree with @SaharanTea's quick service selections.
For snacks I also like
MK - Peter Pan float
EP - caramel corn
Funnel Cake (I believe you can get this at several parks)
heheheTo piggy back (get it?), The pink donut is available in lots of places, and it's pretty darn good.
Quick service:
MK-Pecos Bills, casey’s Corner
AK-Satuli
HS-Backlot express
Epcot-Sunshine seasons
Snacks:
Olaf bars, Mickey pretzels, maleficent cones at mk when they have them (this is my all time favorite)
Caramel corn at Epcot
https://www.elitedaily.com/p/disneys-maleficent-soft-serve-cone-is-perfect-for-halloween-10322035What is a malificent cone?