01 - Place vanilla ice cream, whole milk, mint extract, sugar if using, and green food coloring into blender canister.
02 - Blend on high speed until mixture reaches smooth, creamy consistency. Taste and adjust mint extract or sugar as preferred.
03 - Divide blended milkshake evenly between two tall glasses.
04 - Top each glass with whipped cream and garnish with green sprinkles or maraschino cherry if desired.
05 - Insert straws and serve while cold for best texture and flavor.