Preheat your oven to 350°F (175°C).

Line a baking sheet with parchment paper.

In a large mixing bowl, beat together the softened butter, granulated sugar, and brown sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.

In another bowl, whisk together the flour, baking powder, and salt.

Gradually add the dry ingredients to the wet mixture, mixing until just combined.

Gently fold in the chopped pistachios using a spatula.

Scoop tablespoon-sized amounts of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake for 12-15 minutes or until the edges are lightly golden.

Let your cookies cool on the baking sheet for a few minutes before transferring them to a cooling rack.