Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large bowl, cream together the softened butter and 1/2 cup powdered sugar until light and fluffy.

Mix in the vanilla extract.

Gradually add the flour and salt, mixing until just combined.

Stir in the chopped pistachios until evenly distributed.

Shape the dough into small 1-inch balls and place them on the prepared baking sheet, about 1 inch apart.

Bake for 12–15 minutes, or until the bottoms are lightly golden.

Allow cookies to cool for 5 minutes, then roll them in powdered sugar while still warm.

Let them cool completely and roll in powdered sugar again before serving for an extra snowy coating.