Place the rum, coconut milk, simple syrup, lime juice, crushed ice and banana in a blender. Cover and process until smooth. Editor's Tip: If you make a lot of smoothies, you may already know all of our top tips for making frozen drinks. But if you're new to frozen cocktails, make sure to use a strong blender and start with the lowest setting to break down the ingredients. Stepping the blender from low to high prevents over-blending and creates cocktails with the smoothest texture.
Pour the daiquiri into a chilled glass. If desired, garnish with a cherry and additional banana slices.
