Preheat oven to 350°. Prepare cookie sheet with parchment or silmat

In a medium bowl mix together powdered sugar, cocoa powder, salt, and mini chocolate chips

In the bowl of a mixer with whisk attachment, beat egg whites until thick and foamy, but not until stiff peaks (see picture above)

Briefly fold vanilla and peanut butter into eggs whites, don't worry about completely mixing in peanut butter -it will mix better when dry ingredients are incorporated.

Add in dry ingredients and stir until uniform and combined, the batter will be very thick

Use a cookie scoop to form cookie dough balls and place 2 inches apart onto prepared pan. If you want the cookies to bake up smooth and uniform (like pictured), gently roll each cookie dough ball in your hands to smooth surface.

Bake in preheated oven for 12-14 min or until dry and cracked on top.

Remove from oven and let cookies cool on baking sheet for a couple of minutes and then move them to a cooling rack to cool completely.