Procedures

1. 1

   Combine the ice cream, milk, pistachio butter*, and food coloring (if using) in a blender and pulse on high until the mixture is smooth.

   *If you cannot find pistachio butter at the grocery store, you can make your own by combining 1 cup of pistachios, 1 tablespoon of light vegetable oil, and a pinch of sea salt in a food processor and pulsing until smooth.
   

2. 2

   Pour into a tall, clear glass. Garnish with chopped pistachios and/or a sprig of mint.