01 - Place chilled watermelon cubes into blender pitcher, ensuring they are evenly distributed for efficient blending.
02 - Pour in milk, add vanilla ice cream, and include sweetener if desired. For enhanced flavor complexity, incorporate lime juice at this stage.
03 - Process mixture on high speed until completely smooth and creamy, approximately 30-45 seconds, ensuring no fruit chunks remain.
04 - For thicker consistency, add ice cubes and blend briefly to incorporate. Taste and adjust sweetness if needed based on watermelon ripeness.
05 - Pour into tall glasses and serve right away while cold. Consider garnishing with fresh mint sprig or small watermelon wedge.