01 - Combine vanilla ice cream, milk, peppermint extract, vanilla extract, and green food coloring in a blender. Blend until completely smooth and creamy, approximately 30-45 seconds.
02 - Taste the mixture and adjust peppermint extract or food coloring as desired. Add more extract for stronger mint flavor or additional coloring for deeper green hue.
03 - Pour heavy whipping cream into a chilled bowl. Add powdered sugar and vanilla extract. Whip with hand mixer or whisk until soft peaks form, approximately 2-3 minutes.
04 - Pour the blended shake evenly into chilled serving glasses, leaving approximately 1 inch at the top for whipped cream topping.
05 - Generously top each glass with prepared whipped cream, creating a fluffy mound above the rim.
06 - Sprinkle green sanding sugar or sprinkles over whipped cream. Top with a maraschino cherry if desired. Serve immediately with straws while cold.