01 -
Line a plate with parchment paper. Spread the pistachio cream into a thick sheet or scoop into small dollops. Freeze for at least 1 hour until solid. If spread into a sheet, cut into squares when frozen and return to freezer.
02 -
In a small bowl, combine flour, cornstarch, baking powder, baking soda, and salt. Set aside.
03 -
In a large mixing bowl, whisk together melted butter, brown sugar, and granulated sugar until combined. Add egg and vanilla extract, whisking until smooth and thick.
04 -
Add the flour mixture to wet ingredients and whisk until barely combined. Fold in chopped chocolate and pistachios until just mixed.
05 -
Using a 4-tablespoon cookie scoop, portion dough onto a lined board. Refrigerate for about 1 hour until firm.
06 -
Preheat oven to 350°F. Flatten each dough ball, place frozen pistachio cream in center, and seal. Top with extra chocolate, pistachios, and frozen cream pieces. Bake 11-12 minutes until edges are set but centers are soft. Sprinkle with flaky salt immediately.