Any one of the numerous mega caramel apples they have. The one covered in chocolate and peanut butter chips is pretty amazing. The apple pie apple is a cast member favorite and was very good (though I don't love white chocolate).
In Animal Kingdom, just outside Dinoland we had the new chocolate-bourbon shake with candied bacon and the buffalo chicken chips at Trilo-Bites (house made chips covered in buffalo chicken, blue cheese, and some blue cheese dressing).
Tamu Tamu refreshments in Africa in AK have enormous chocolate-chocolate chip cookie ice cream sandwiches.
The Crocque Glaces in France (at the ice cream place). Ice cream pressed in a brioche roll.
The No Way, Jose at Beaches and Cream
Numerous things at the Werthers store in Germany.
The naan-dipping appetizer at Sanaa at Kidani Village.
Dole whip floats when they had vanilla dole whip (in the park)