Cashews add to the thickness / creaminess without adding more banana. You can also use frozen avocado or tofu to achieve this consistency you can sub the banana or cashews for 1/2 cup coconut cream (just the thick part) if you don't have medjool dates you can use 2-3 tbsp pure maple or medjool date syrup (test for sweetness and add more if needed) you can blend, place in freezer, then blend again a couple hours later to make it even thicker to DQ blizzard type consistency