Preheat your oven to 350 degrees. Line a sheet pan with parchment paper.
Whisk together the powdered sugar, salt and cocoa, then add the pecans.
Add the egg whites and chocolate chips, then only mix until the batter comes together.
Drop large scoops of batter on your prepared baking sheet. You should get about 6 large cookies (or 10 smaller ones). Bake for 17 minutes, or until the tops of the cookies are just starting to look dry and crackly.
Let cool completely before eating and storing.