Banana "ice cream" sounds like what you're looking for :)
However, you can freeze any Blast recipe...some will turn out creamier than others depending on the ingredients.
Here is one of my favorite:
*you'll need to add a tiny touch of liquid (I like almond milk) when making in the NutriBullet
Feel free to make it fancy by adding some cacao powder, coconut, nibs, goji berries, etc. into or on top :)