Preheat your oven to 350°F (175°C).
In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
Add the pistachio pudding mix and blend until fully incorporated.
Mix in the eggs, one at a time, followed by the vanilla extract until well combined.
In a separate bowl, whisk together the flour, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Fold in the chopped pistachios, making sure they’re evenly distributed throughout the dough.
Scoop the dough onto a prepared baking sheet, leaving space between each cookie.
Bake in the preheated oven for 10-12 minutes, or until the edges start to turn golden brown.
Allow the cookies to cool on the baking sheet for a few minutes before transferring to wire racks to cool completely.