In a large mixing bowl, cream together the butter, brown sugar, and white sugar until light and fluffy, about 3-4 minutes.

In a separate bowl, whisk together the flour, baking soda, and salt until well combined.

Gradually add the dry ingredients to the creamed butter and sugars, mixing on low speed just until incorporated, then gently fold in the egg.

Stir in the chopped pistachios and chocolate chips until evenly distributed.

Using a cookie scoop, portion out the dough onto lined baking sheets, about 2 inches apart.

Preheat your oven to 350°F (175°C) and bake the cookies for about 12 minutes, or until the edges are golden brown.

Allow to cool on the baking sheet for 5 minutes before transferring to a cooling rack.