My wife and I enjoy the Wookie Cookie at Backlot Express. I'm not sure if the Starbucks location still sells the Butterfinger Cupcake (now called something else). We also enjoy getting shakes at Sci-Fi Dine-In Theater.
There is an ice cream spot over by rockin rollercoaster and tower of terror. They don’t have anything special that I remember but we’ve gotten sundaes there before and they were good.
Hollywood scoops has ice cream sundaes. They have waffles for breakfast, but they don’t combine them with ice cream. The carrot cake whoopie pie at Trolly Car Cafe is really good too.