Best Tiramisu in South Florida?

That certainly depends upon an individuals taste buds. Sounds like you'll have to visit the Tiramisu Restaurant on West Camino Real in Boca. While you're in that area, check out the Cafe Augustin French Bakery on 5th Avenue and order their Tiramisu. In Coconut Creek, you may find Carlucci's on Lyons Road makes the best. And believe it or not, the Tiramisu at the Olive Garden is very good.