- Slice fresh bananas and freeze in the freezer for 2-3 hours, or use already frozen bananas.
- Let frozen bananas thaw for 10 minutes.
- Combine frozen bananas and frozen blueberries within the blender.
- To open the vanilla bean, slide carefully down the middle and scrape innards into the blender with a knife.
- Blend until pureed, but not too long or the heat from the blender will begin to melt the ingredients.
- Serve as is, or freeze to reharden it for a more thicker texture.