Brownie cookies deliver crackle-topped, fudgy-centered chocolate cookies built on melted semisweet chocolate and Dutch-process cocoa powder. They come together in one bowl using a creaming method and bake in under 15 minutes. Flaky sea salt on top is optional but highly recommended.
Preheat the oven to 350°F conventional. Line two baking sheets with parchment paper or silicone mats.
Whisk together flour, cocoa powder, baking powder, and salt in a medium bowl. Set aside.
In the bowl of a stand mixer, cream butter and both sugars until light and fluffy.
Add the eggs one at a time, beating well between each addition and scraping down the bowl as needed. Add the vanilla with the egg yolk.
Pour in all the melted chocolate at once and beat well until fully combined and glossy.
Reduce the mixer to low and gradually add the dry ingredients, mixing until just incorporated.
Add the chocolate chips and mix until evenly distributed.
Use a cookie scoop to portion the dough onto the prepared baking sheets. If the dough looks more like batter, the melted chocolate was too warm: refrigerate it for 15 minutes before scooping. Sprinkle with flaky sea salt.
Bake for 13 to 15 minutes, until the outsides are set, the tops are cracked, and the centers no longer look raw. Cool on the pan for 5 minutes, then transfer to a wire rack.
Video
Notes
Yield: 24 cookies. Doneness Cue: The outsides should be set and the tops fully cracked, with centers that no longer look like raw dough. Storage: Store baked cookies well-wrapped or in an airtight container at room temperature for up to 3 days, or freeze for up to 2 months and thaw at room temperature before serving. Make Ahead: Scoop the dough into portions and freeze on a baking sheet until solid, then transfer to a freezer bag for up to 2 months. Bake from frozen at 350°F conventional, adding 2 to 3 minutes to the bake time.