01 -
Line a plate with parchment paper. Pour the pistachio spread on top and spread it into a thick sheet. If the pistachio spread is thick enough, scoop it into small dollops with a spoon. Freeze for at least 1 hour or overnight until solid. For the sheet method, cut the frozen sheet into squares and return them to the freezer until needed.
02 -
Line a cutting board or plate with parchment paper to chill the cookie dough later. Set aside.
03 -
In a small bowl, stir together flour, cornstarch, baking powder, baking soda, and salt. Set aside.
04 -
In a large mixing bowl, combine melted and cooled butter, brown sugar, and granulated sugar. Whisk until combined. Add the egg and vanilla extract, then whisk until smooth and thick.
05 -
Add the flour mixture to the butter mixture and whisk until just barely combined, leaving some flour patches.
06 -
Add chopped chocolate and pistachios. Use a spatula to fold them in and finish mixing the dough until just combined.
07 -
Use a 4-tablespoon scoop to portion the cookie dough. Place the dough balls onto the lined parchment board. Chill in the fridge for about 1 hour or until firm.
08 -
Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
09 -
Flatten a dough ball into a disk with your fingers. Place a frozen pistachio cream stack (3-4 squares, depending on thickness) in the center and seal the cookie dough around it.
10 -
Place stuffed cookie dough balls on the lined baking sheet, leaving about 2 inches between each. Press additional chocolate chunks, pistachios, and pistachio cream chunks on top.
11 -
Bake cookies for 11-12 minutes until the edges are set but the centers are soft. Sprinkle flaky salt on top immediately after baking. Cool on the tray for 5 minutes and serve warm for gooey centers, or let them cool completely for firmer filling.