Using a stand mixer with paddle attachment whisk the sugar, cocoa, flour and salt to combine.
Add in egg whites, one at a time. Then add in vanilla extract. Mix on medium high for 2-3 minutes.
Meanwhile, in a food processor or grinder pulse the pecans until finely chopped, until you reach a grainy consistency with maybe few bigger pieces in between. I used my coffee grinder and pulsed 3-4 times only.
Add pecans and chocolate chips to the mixer bowl and whisk on medium low for only about 20-seconds.
Drop 1 tbsp measure of cookie dough onto a lined sheet pan, leaving about an inch of space apart.
Bake for 14-16 minutes at 325F degrees in middle rack until edges start to dry. The middle will be soft.
Remove cookies from oven and let it cool completely before removing from sheet pan.