01 - Add milk, crushed ice, sugar, and peppermint extract to a blender.
02 - Blend on high speed until smooth and frothy.
03 - Taste and modify sweetness or peppermint intensity as preferred.
04 - Pour into chilled glasses.
05 - Top with whipped cream, sprinkle crushed peppermint candies, and garnish with fresh mint leaves if desired. Serve immediately.