Place small bowls on the counter. Crack the eggs placing the egg whites in one bowl and the egg yolks in the second bowl. The egg yolks can then be discarded or used for another recipe.
3 large eggs - whites only
Pour the egg whites and vanilla into the bowl with the powdered sugar and cocoa mixture. With an electric mixer set to low, whip together until the mixture starts to combine.
1 teaspoon vanilla extract
Bump the electric mixture up to medium and continue mixing until a thick but somewhat runny batter forms. Sometimes the amount of liquid in the eggs can vary, if your batter is thicker like frosting add an additional tablespoon of water and whip again until mixed.
Pour in the chocolate chips into the cookie dough. With a silicone spatula fold the chocolate chips into the cookie dough until mixed.
1 cup chocolate chips
With a cookie scoop, portion the cookies onto the baking sheets with at least three inches between cookies. Don’t put more than six cookies per pan as these cookies will expand a lot.
Bake the cookies in the oven for 13-14 minutes until the outsides form a crunchy crust and look a little crackly. The insides of the cookie may seem gooey, but that’s ok. Allow the cookies to cool completely on the parchment-paper covered pan. Carefully peel the parchment paper away from the cookies, then enjoy!
Notes
If you are using a liquid pourable egg whites, you'll need 3 ounces.