Chocolate Angel Food Cake - cooking recipe

Ingredients

3/4 c. cake flour
1/4 c. cocoa
7/8 c. sugar
1 1/2 c. egg whites (about 12)
1 1/2 tsp. cream of tartar
1/4 tsp. salt
1 1/2 tsp. vanilla extract
3/4 c. sugar

Preparation

Measure and sift together 3 times: cake flour, cocoa and 7/8 cup sugar.
Set aside.
Measure egg whites, cream of tartar, salt and vanilla into large mixing bowl.
Beat with mixer (on high) until foamy throughout.
Add the 3/4 cup sugar gradually, 2 tablespoons at a time.
Beat 10 seconds after each addition. Continue beating until meringue is firm and holds stiff, straight peaks when knife or spatula is gently lifted out of meringue.