Heat oven to 325°F.
Combine 1-3/4 cups sugar, flour, cocoa, baking powder, salt and baking soda in large bowl. Add oil, egg yolks, water and vanilla; beat until smooth.
Beat egg whites and cream of tartar in extra-large bowl until soft peaks form. Gradually add remaining 1/4 cup sugar, beating until stiff peaks form. Gradually pour chocolate batter over beaten egg whites, folding with rubber spatula just until blended. Pour into ungreased 10-inch tube pan.
Bake 1 hour and 20 minutes or until top springs back when touched lightly. Invert pan on heat-proof funnel until completely cool. Remove cake from pan; invert onto serving plate. Spread top of cake with Vanilla Glaze, allowing some to drizzle down sides.
Melt butter in medium saucepan over low heat. Remove from heat. Stir in powdered sugar and vanilla. Stir in water, 1 tablespoon at a time, until smooth and of desired consistency. About 1-1/4 cups glaze.
Cocoa Peppermint Chiffon Cake: Omit vanilla extract; add 1 to 1-1/2 teaspoons peppermint extract. Add red food color to Vanilla Glaze for pink colored glaze. Garnish with crushed hard peppermint candy.
*The % Daily Value tells you how much a nutrient in aserving of food contributes to a daily diet. 2,000 caloriesa day is used for general nutrition advice.
Nutrition information does not include recipe variations and garnish. Nutrition information includes Vanilla Glaze.