Hi Abigail!
You're going to visit Walt Disney World Resort during the most wonderful season of all. The decor will be holiday-sweet and the snacks even sweeter! Sadly there isn't a comprehensive list of every item that does and doesn't count as a
Disney Dining Plan snack entitlement as menu items come and go all the time. Some snacks are seasonal, eats can be themed to special events, and festivals bring festival-only foods. Your vacation happens to fall within the time frame of both the
Epcot International Festival of the Holidays AND
Mickey's Very Merry Christmas Party where you'll be able to find limited-time goodies at both.
What I can share is that the majority of items that do qualify as Disney Dining Plan snack entitlements are those whose prices fall within the $3 to $8 range. Everything from a cup of coffee or bottled water to a funnel cake with toppings. And if you look hard enough you can even find more substantial 'snacks' that can count as small meals, like the ham and cheese croissant at Les Halles Boulangerie-Patisserie in Epcot or the mac & cheese at Eight Spoons Cafe in Disney's Animal Kingdom.
A quick way to search for what will and won't count is to either search the web for a recent picture of a restaurant menu, or to check a menu in your My Disney Experience App. The dining locations that participate in
Mobile Ordering will notate which items do qualify as a snack credit.
I hope this helped, and We'll See You Real Soon, Abigail!
~Kristen