- 1 cup milk
- 1 banana
- 3 ice cubes
- 1 tablespoon white sugar
- 20 graham crackers
- Combine milk, banana, ice cubes, and sugar in a blender; blend until smooth. Pour into a freezer-safe container.
- Freeze banana ice cream until firm, about 30 minutes.
- Spread ice cream onto 10 graham crackers; top each with another graham cracker to create a sandwich.