Put all the ingredients in a blender and mix until creamy (you don`t have to use sweeteners, but you can) until you get an ice cream.
You may sometimes have to stop briefly to stir the whole thing so that all the bits are reached.
Normally with Nicecream you freeze the bananas in pieces over night beforehand. But it is not necessary here, as the raspberries make up the majority and cool everything down nicely.