Contest-Winning Chocolate Angel Food Cake

Ingredients

• 1-1/2 cups egg whites (about 10 large)
• 3/4 cup cake flour
• 1-1/2 cups plus 2 tablespoons sugar, divided
• 1/4 cup baking cocoa
• 1-1/2 teaspoons cream of tartar
• 1-1/2 teaspoons vanilla extract
• 1/4 teaspoon salt
• CHOCOLATE FLUFF FROSTING:
• 2 cups heavy whipping cream
• 1 cup sifted confectioners' sugar
• 1/2 cup baking cocoa
• Dash salt