Ingredients

  • 2/3 cup sifted cake flour (not self-rising)
  • 1/3 cup unsweetened cocoa
  • 1 1/2 cups granulated sugar, divided
  • 12 large egg whites, at room temperature
  • 1 1/2 teaspoons vanilla extract
  • 1 1/2 teaspoons cream of tartar
  • 1/2 teaspoon salt
  • confectioners' sugar, for garnish

Method

  • Heat oven to 375 degrees.
  • Sift flour, cocoa and 3/4 cup granulated sugar together 3 times; set aside.
  • Beat egg whites at low speed in a large mixer bowl until foamy, about 5 minutes.
  • Add vanilla, cream of tartar and salt.
  • Gradually increase speed to medium while beating in remaining 3/4 cup granulated sugar, 1 tablespoon at a time, 5 minutes.
  • When sugar is incorporated, continue beating to stiff peaks, 2 minutes more.
  • Sift one third of dry ingredients over whites; gently fold in with rubber spatula.
  • Repeat process 2 more times.
  • Pour batter into ungreased 10-inch tube pan.
  • Cut through batter to remove air pockets.
  • Bake 40 to 45 minutes, until top springs back when gently pressed.
  • Invert and hang pan on neck of bottle to cool.
  • To unmold, run a thin knife around side of pan and tube; invert pan.
  • Turn cake upright onto serving plate.
  • Garnish with confectioners' sugar, if desired.