In a grinder add 2 cups of pistachios and grind them into a fine powder.
In a large sauce pan add half cup full fat milk and half cup sugar.
Whisk the milk and sugar mixture well until sugar dissolves.
Now add heavy cream and pistachio powder in the milk and whisk it well.
Now if you don't have an ice cream you can use a regular blender to prepare your ice cream.
Blend the whole mixture in the blender until it thickens.
Refrigerate your ice cream for about 12 hours before you serve it cold.