Lightly toast the pistachios in a dry skillet over medium heat for about 5 minutes.
Allow the pistachios to cool and then blend them into a coarse paste.
In a mixing bowl, combine heavy cream, whole milk, and granulated sugar until dissolved.
Stir in the pistachio paste, vanilla extract, and a pinch of salt.
Pour the mixture into an ice cream maker and churn according to manufacturer’s instructions.
Transfer the ice cream to an airtight container.
Freeze for at least 4 hours to firm up.
Serve with a drizzle of chocolate syrup if desired.