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["Place rack in center of oven and 15 minutes before baking, preheat to 375u00b0.", "Divide sugar in half.", "Sift one half 3 times.", "Set aside.", "Sift the other half of sugar with the flour and cocoa 3 times.", "Set aside.", "Put egg whites in 4 quart grease-free bowl and beat on low speed with electric mixer until foamy.", "Add cream of tartar, vanilla and salt and increase speed to medium.", "Add the 3/4 cup sugar, one T at a time, beating well after each addition.", "Continue beating on medium until whites have increased their volume fivefold and hold their shape but are still shiny and moist.", "Gently and thoroughly fold in flour mixture, by thirds.", "Pour into ungreased 10"" tube pan.", "Smooth the surface and cut through batter 5 or 6 times with a rubber spatula to break large air pockets.", "Bake 30-35 minutes until toothpick inserted in center comes out clean.", "Invert over a narrow-necked bottle and allow to cool.", "When completely cooled use a knife to loosen it from the side of the pan and turn out on wire rack.", "Drizzle Chocolate Glaze over top and allow to run down sides of cake.", "Chocolate Glaze: Combine chocolate, butter and water in bowl and microwave on high for 2-3 minutes, stirring once a minute until smooth."]
