Dark Chocolate Pistachio Butter Cookie Bars 2 cups (10 oz) shelled pistachios 1/2 cup (1 stick) butter, softened 1/2 cup sugar 1/2 cup brown sugar 1 3/4 cup all purpose flour 1 (12 oz) bag dark chocolate chips 1/2 teaspoon coarse sea salt 1. Place 2 cups shelled pistachios into the work bowl of a