Zebra Domes are my all-time favorite. I also adore the Coconut Tiramisu from Boma but I am not certain it is still there (it definitely is not there every night, but they rotate menus)
I would agree with the person who mentioned the Strawberry Shortcake at Sunshine Seasons - amazing.
I like Dole Whips swirled with the Vanilla softserve (you can also get this with Orange at the MK).
No Way Jose at Beaches and Cream
Final mention would be the chocolate mousse at the Boulangerie Pattiserie