I've never had it or seen it here but as someone who was a major fan of both Banana and Caramel milkshakes as a kid, it always caught my eye and it's probably worthy of the bucket list.
They also put coffee in the version at the cafe I like, but idk if that's usual. Banana coffee and toffee. It's relatively easy to make if you know how to bake some basic stuff, it doesn't use a regular pie shell, just like a Graham crust or cookie crust