01 - Add chilled watermelon cubes to blender container, ensuring fruit is evenly distributed at bottom.
02 - Pour in milk measure, followed by vanilla ice cream. Add sweetener and lime juice if using.
03 - Process on high speed until completely smooth and creamy, approximately 45-60 seconds.
04 - For thicker texture, add several ice cubes and blend again until incorporated.
05 - Pour into tall glasses, garnish with fresh mint or watermelon wedge if desired.