4 cups mint leaves
1 cup simple syrup
Bring 2 quarts water to a boil in a large pot.
Meanwhile, prepare an ice-water bath and set aside.
Add mint leaves to boiling water for about 30 seconds; drain and immediately transfer mint to ice-water bath.
Drain and squeeze out excess water.
Transfer mint leaves to blender along with simple syrup.
Puree until smooth.
Transfer mixture to an ice-cream maker and freeze according to manufacturer’s instructions. Keep frozen in an airtight container until ready to use. Will keep for up to three days.