01 - Add vanilla ice cream, whole milk, peppermint extract, fresh mint leaves if using, and granulated sugar to the blender jar.
02 - Process on high speed until mixture achieves a completely smooth, creamy consistency without visible mint leaf pieces.
03 - Taste the blended milkshake and add additional sugar or peppermint extract as needed to achieve desired sweetness and mint intensity.
04 - Divide the milkshake evenly between two pre-chilled glasses, pouring carefully to maintain the smooth texture.
05 - Top each serving with a generous swirl of whipped cream and finish with one maraschino cherry placed on top.
06 - Present milkshakes promptly with straws while the texture remains thick and the whipped cream holds its shape.