Protein Sparing Chocolate Frosting

Name: Protein Sparing Chocolate Frosting
Prep time: 5 min
Cook time: 7 min
Ingredients: 2 large egg whites; 1 cup Powdered Natural Sweetener (or equivalent powdered sweetener); 1/4 teaspoon cream of tartar; 1/3 cup cold water (plus more for saucepan); 1 1/2 teaspoon vanilla extract (or chocolate extract); 1/8 teaspoon Sea Salt; 1/4 cup unsweetened cocoa powder