Stir in granulated sugar and next 2 ingredients until blended.
Stir together flour, cocoa, and baking powder in a small bowl.
Stir flour mixture into chocolate mixture until well blended.
Credit: Linda Pugliese, Hector Sanchez; Styling: Heather Chadduck Hillegas, Buffy Hargett Miller
Cover bowl with plastic wrap, and chill 1 hour to 5 days.
Preheat oven to 350.
Place coated cookies 1 inch apart on 2 parchment paper-lined baking sheets.
Bake, in batches, at 350 for 10 minutes or until cookies are crackled.
Cool completely on a wire rack (about 20 minutes).
