For the brownie cookie batter
01 -
6 oz (170 g) bittersweet chocolate, chopped
02 -
1/2 cup (113 g) unsalted butter, cubed
03 -
3/4 cup (150 g) granulated sugar
04 -
1/2 cup (105 g) packed light brown sugar
05 -
2 large eggs, room temperature
06 -
1 teaspoon vanilla extract
07 -
1 cup (120 g) all-purpose flour
08 -
1/3 cup (28 g) Dutch-process cocoa powder
09 -
1/2 teaspoon baking powder
10 -
1/2 teaspoon fine salt
11 -
1/2 teaspoon espresso powder, optional
12 -
3/4 cup (128 g) semisweet chocolate chips
For finishing
13 -
Flaky salt, for sprinkling, optional