These are some top Disney World snacks that I have been came across:
Top Iconic snack items:
Dole Whip or Dole Whip Float (pictured)
Mickey Ice Cream Bar
Popcorn (Especially on Main St.in Magic Kingdom)
School Bread from the Kringla Bakeri og Kafe in Epcot Norway
Zebra Domes from Boma and also at Mara in Animal Kingdom Lodge
Top Breakfast Snack Items:
Warm Cinnamon Rolls from Main St. Bakery in Magic Kingdom
Yogurt Parfait
Cheese Danish and other assorted Danishes.
Blueberry Muffins and other assorted muffins.
Fresh Fuit Bowls.
Top Lunch Snack Item:
Pork Egg Rolls at Yak & Yeti Quick Service in Animal Kingdom
Chicken Fried Rice at Yak & Yeti Quick Service in Animal Kingdom
Mixed Greens Salad at Catalina Eddie's, Toy Story Pizza Planet, & Rosie's in Hollywood Studios
Soup at Rosie's All American Cafe in Hollywood Studios
Top Disney World Snacks For Desserts
Butterfinger Cupcake at Starring Rolls Cafe
Ice Cream Cookie Sandwich at Main St. Bakery
Napoleon from Boulangerie Patisserie in Epcot
Any Dessert ( Butterfinger Cheesecake, Key Lime Pie) From Sunshine Seasons in Epcot