Chocolate Angel Food Cake I Recipe

Ingredients

• 2 cups egg whites
• 0.25 teaspoon salt
• 1.25 teaspoons cream of tartar
• 1.25 cups white sugar
• 1.25 cups confectioners' sugar
• 1.25 cups cake flour
• 0.25 cup unsweetened cocoa powder
• 1.25 teaspoons vanilla extract