The ice cream
The ice cream itself tastes, at first, like standard vanilla. Which is confusing! But then moments later, when the numbing coldness loosens its grip on your tongue, you get a full, pleasant, and none-too-overpowering dose of banana-y, tropical sweetness. That’s the risk with banana. It’s a treble, not a bass note. Making it the foundation of your ice cream could backfire, but they seem to have done a fine job here.