01 - Combine vanilla ice cream, milk, mint extract, sugar (if using), and green food coloring in a blender.
02 - Blend until completely smooth and creamy. Taste and adjust mint extract or sugar as desired.
03 - Pour the milkshake evenly into two tall glasses.
04 - Top with whipped cream and garnish with green sprinkles or a maraschino cherry, if desired.
05 - Serve right away with straws while chilled.