Chocolate Meringue cookies 

Preheat oven to 225 degrees F. Line a baking sheet with parchment.

In a small bowl, use a hand mixer to beat the egg whites and cream of tartar with a hand mixer until soft peaks form. With the mixer on low, slowly sprinkle in the sweetener until completely incorporated. Add the cocoa powder and continue to beat until stiff peaks form.

Spoon the mixture into a piping bag and form 1 inch meringue cookies on the parchment that are about 1/4 inch apart from each other. 

Place in oven and cook for 1 hour, then turn off the oven and let the cookies stand in the oven for another 20 minutes.