Preheat oven to 350 degrees F. Place the nuts on a baking sheet and toast for 10-12 minutes, tossing a few times, until fragrant. Remove from the oven and cool.

Lower the oven temperature to 320 degrees F and place the racks in the top and bottom thirds of the oven. Prepare 2 baking sheets with parchment paper. Set aside.

In a bowl, stir together the egg whites powdered sugar, cocoa powder, salt and vanilla until fully combined. Add the nuts and stir in.

Drop 2 tbsp scoops of the batter onto the cookie sheet, only 6 to a cookie sheet, making sure the cookies are evenly spaced from each other and the edge of the pan as they spread a lot!

Place baking sheets in the oven and bake for 12-14 minutes, rotating and switching the baking sheets half way through. The cookies are done when they are fully puffed up and cracked on top. Do not continue to bake once they have fully puffed up and cracked. Do not remove from the oven too soon as they wont hold together.

Remove from the oven when done and let cool on the baking sheet for a few minutes before sliding the parchment paper off the baking sheet onto a cooling rack to cool completely.

Repeat with the remaining cookie dough.