Flourless Double Chocolate Chip Cookies are a 6 ingredient recipe that requires ZERO flour, only egg whites, and still magically comes out chewy, flavorful, and rich.
Mix dry ingredients. In a large mixing bowl, whisk together the powdered sugar, cocoa powder, and salt until evenly combined.
Add wet ingredients. Stir in the egg whites and vanilla extract using a spoon until the batter is fully moistened. The texture should be thick and glossy, similar to brownie batter, not stiff like cookie dough.
Fold in chocolate. Gently fold in the chocolate chips until evenly distributed.
Portion cookies. Scoop the batter into 1 ½ to 2 tablespoon portions and place onto a parchment-lined baking sheet, leaving about 2 inches of space between each cookie.
Rest batter. Let the cookies rest on the baking sheet for 30 minutes, or until a dry skin forms on the surface and the batter no longer sticks when lightly touched.
Bake. Bake at 350°F for 15 minutes.
Cool. Allow cookies to cool completely on the baking sheet before removing.
Notes
Texture check. Batter should be glossy and thick but scoopable; if too wet, whisk in 1 to 2 tablespoons powdered sugar.
Measuring tip. Measure vanilla precisely. Adding extra liquid will affect the structure.
Scaling. Recipe can be reduced to 1 egg white; use 3 tablespoons cocoa powder and scale remaining ingredients to one-third.