Magic Kingdom: Dole Whips from Aloha Isle or Ice Cream sandwich from Main Street
Epcot: kaki gori (melon flavored) from Japan, School Bread from Norway, Sacristain or peach tart from French Bakery, fried wontons from China
MGM: hot jalapeno cheese filled pretzel from the stand or peanut butter/jelly milk shake from Prime Time
AK: frozen banana
Downtown Disney: cheesecake from cheesecake factory at DQ