- 1 cup milk
- 1 very ripe banana
- 1 tablespoon simple syrup (optional)
- ice cubes
- 1 cup cold brew coffee
- Combine milk, banana, and simple syrup in a blender; blend until very smooth, about 1 minute.
- Fill two 16-ounce glasses with ice cubes. Divide coffee between the glasses. Pour banana milk on top, dividing it evenly between the glasses.