Chocolate Angel Food Cake

Directions

1. Sift flour, cocoa and 3/4 cup sugar together 4 times; set aside.
2. Combine egg whites with next 4 ingredients in large bowl. Beat at high speed of electric mixer until egg whites are stiff but not dry.
3. Add remaining 1 cup sugar gradually, beating constantly. Sprinkle flour mixture quickly over egg whites, beating constantly at low speed.
4. Spoon into ungreased tube pan. Cut through batter with spatula 6 times.
5. Bake at 375 degrees F for 35 minutes. Cool completely, inverted.