01 -
Line a plate with parchment paper. Spread the pistachio cream into a thick sheet, or scoop out small dollops if it is thick enough. Freeze for at least 1 hour or overnight until completely solid. If using a sheet, cut the frozen pistachio cream into squares. Keep frozen until assembly.
02 -
Line a cutting board or plate with parchment paper to chill the cookie dough. Set aside.
03 -
In a small bowl, whisk together the all-purpose flour, cornstarch, baking powder, baking soda, and salt until thoroughly combined.
04 -
In a large mixing bowl, whisk together the melted and cooled butter, brown sugar, and granulated sugar until combined. Add the egg and vanilla extract, and whisk until the mixture is smooth and thick.
05 -
Add the dry ingredient mixture to the wet mixture and mix until just incorporated, leaving a few streaks of flour.
06 -
Gently fold the chopped chocolate and chopped pistachios into the dough with a spatula, mixing until just combined.
07 -
Use a 4-tablespoon cookie scoop to portion out dough balls onto the lined cutting board. Chill dough balls in the refrigerator for approximately 1 hour or until firm.
08 -
Preheat oven to 175°C. Line a baking sheet with parchment paper.
09 -
Flatten a chilled dough ball into a round using your fingers. Place a frozen portion of pistachio cream (about 3-4 squares or 1 dollop) in the centre. Fold the dough around the filling to fully enclose it.
10 -
Place stuffed dough balls onto the prepared baking sheet, spacing them 5 cm apart. Top each with additional chocolate chunks, chopped pistachios, and pistachio cream chunks as desired.
11 -
Bake for 11-12 minutes or until edges are set but centres remain soft. Remove from oven and immediately sprinkle with flaky salt. Allow cookies to cool on the baking sheet for 5 minutes. Enjoy warm for a gooey centre or cool completely for a firmer filling.