Place egg whites in a large bowl; let stand at room temperature for 30 minutes. Sift together confectioners' sugar, flour and cocoa three times; set aside.
Add cream of tartar and salt to egg whites; beat on medium speed until soft peaks form. Gradually add sugar, about 2 tablespoons at a time, beating on high until stiff glossy peaks form and sugar is dissolved. Gradually fold in flour mixture, about 1/2 cup at a time.
Spoon into an ungreased 10-in. tube pan. Cut through batter with a knife to remove air pockets. Bake on the lowest oven rack at 375degrees for 35-40 minutes or until lightly browned and entire top appears dry. Immediately invert pan; cool completely, about 1 hour.
Run a knife around side and center tube of pan. Remove cake to a serving plate.
In a large bowl, combine the first five frosting ingredients; cover and chill for 1 hour. Beat until stiff peaks form.
Spread over the top and sides of cake. Store in the refrigerator. Garnish with chocolate leaves if desired.
Take your taste buds on a journey to paradise with this heavenly Chocolate Angel Cake!
Prepare to be mesmerized as you indulge in a culinary masterpiece that encapsulates the essence of chocolatey bliss. This cake is not merely a dessert; it's a symphony of flavors that will serenade your senses and leave you craving for more. Every bite is a testament to the baker's artistry, a testament to the power of simple yet exquisite ingredients combined with a touch of love.
The cake's ethereal texture is a testament to the precision of the recipe. The egg whites, whipped to perfection, lend an airy lightness that melts in your mouth like a cloud. The chocolate, rich and decadent, provides a luxurious depth of flavor that complements the delicate sweetness of the sugar. Each forkful is a harmonious blend of textures and tastes, creating an unforgettable culinary experience.