01 - 
                Portion pistachio cream into tablespoon-sized scoops on a parchment-lined tray and freeze until solid.
              
              
              
                02 - 
                Melt butter in a small pan over medium heat until foamy and golden brown bits appear; remove from heat promptly.
              
              
              
                03 - 
                Transfer browned butter to a bowl and chill briefly in the freezer until cool but not solidified; if needed, add a teaspoon of water to reach 1/2 cup volume.
              
              
              
                04 - 
                Whisk both sugars into the cooled browned butter until the mixture is glossy and homogenous.
              
              
              
                05 - 
                Mix in the room temperature egg and vanilla extract until a smooth, creamy consistency forms.
              
              
              
                06 - 
                Gently fold in the flour, baking powder, baking soda, and salt until barely combined, leaving some streaks of flour.
              
              
              
                07 - 
                Carefully fold chopped chocolate and pistachios into the dough, avoiding overmixing to maintain softness.
              
              
              
                08 - 
                Scoop approximately three tablespoons of dough, flatten in hand, place one frozen pistachio cream ball in center, and wrap dough fully around it.
              
              
              
                09 - 
                Arrange stuffed dough balls on a tray, cover, and refrigerate for at least 30 minutes or freeze for longer storage.
              
              
              
                10 - 
                Place chilled dough balls on a parchment-lined baking sheet, optionally drizzle with extra pistachio cream, and bake at 350°F (177°C) for 12–14 minutes until edges turn golden.
              
              
              
                11 - 
                Immediately after baking, rotate each cookie with a round bowl to even their shape; cool briefly on baking sheet before transferring to a wire rack to finish cooling.