Glazed Chocolate Angel Food Cake

Directions

1. Place egg whites in a large bowl; let stand at room temperature 30 minutes.
2. Preheat oven to 350°. Sift flour, 1 cup sugar and cocoa together twice.
3. Add cream of tartar, vanilla and salt to egg whites; beat on medium speed until soft peaks form. Gradually add remaining sugar, 2 tablespoons at a time, beating on high after each addition until sugar is dissolved. Continue beating until stiff glossy peaks form. Gradually fold in flour mixture, about 1/2 cup at a time.
4. Gently transfer to an ungreased 10-in. tube pan. Cut through batter with a knife to remove air pockets. Bake on lowest oven rack until top springs back when lightly touched and cracks feel dry, 40-50 minutes. Immediately invert pan; cool completely in pan, about 1 hour.
5. Run a knife around sides and center tube of pan. Remove cake to a serving plate. For glaze, in a microwave, melt chocolate chips with cream; stir until smooth. Drizzle over cake.