Preparation

• Preheat oven to 350°F and line two baking sheets with parchment paper.
• Whisk together flour, cocoa, baking powder, and salt in a medium bowl.
• Place chopped chocolate and butter in a double boiler or in a heat-proof bowl over a saucepan of gently simmering water. Slowly melt the chocolate, stirring occasionally until smooth. Remove from heat and set aside to cool slightly.
• Combine eggs, sugars, and vanilla in a large mixer bowl fitted with a whisk attachment and whisk together on medium speed for 5 minutes, until pale and doubled in volume.
• Reduce speed to low and beat in melted chocolate for 1 minute. Add flour mixture and mix on low speed for 20 seconds, just until combined. Fold in chocolate chips (dough will resemble a gooey brownie batter).
• Use a medium cookie scoop coated lightly with nonstick spray to form the cookies – invert the scoop just above the baking sheets, spacing cookies 2 inches apart.