1 c. fresh mint sprigs
2 c. cubed watermelon
3 c. ice cubes + water (Use 3 cups total. You can use ½ c. water and ½ cup ice. Or use ⅓ c. water and ⅔ c. ice. Using more ice will make it thicker.)
Extra mint for garnish, optional
Add all ingredients to a blender. Blend on high until ice is blended. Pour in glasses. Garnish with extra mint sprig if desired. Serve immediately.