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

Grind half of the pistachios in a food processor until finely ground.

Whisk together the all-purpose flour, baking powder, baking soda, and salt in a medium bowl.

Beat the softened butter, light brown sugar, and granulated sugar until light and fluffy.

Incorporate the egg yolks and vanilla extract into the mixture until fluffy, then stir in ground pistachios.

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

Fold in chopped dark chocolate and remaining pistachios gently.

Scoop dough balls onto prepared baking sheets, spacing them 2 inches apart.

Bake for 10-12 minutes, aiming for lightly golden edges.

Let cookies sit on the baking sheet for 5 minutes before transferring to a wire rack.

Press additional chocolate chunks and chopped pistachios on top while warm.