Preheat oven to 350 degrees F. Line a 15x10-inch jelly roll pan with waxed paper. Grease and flour lined pan; tap out excess. In a medium bowl, combine flour, cocoa powder, cornstarch, baking soda, baking powder and salt. Mix well. In a separate bowl, using an electric mixer set on medium speed, beat egg yolks and 1/4 cup sugar until fluffy.
In a small bowl, using clean beaters, beat egg whites on high until foamy. Gradually add 1/2 cup sugar, beating until stiff, but not dry, peaks form. Fold 1/3 beaten egg whites into egg yolk mixture. Alternately fold in remaining whites and flour mixture. Pour batter in pan; smooth top. Bake until a toothpick inserted in center comes out clean, about 15 minutes.
Dust a clean cloth with remaining sugar. Turn cake out onto prepared cloth; remove waxed paper. Trim the cake's edges. Starting with a long side, tightly roll up cake with cloth. Transfer cake, seam-side down, to a wire rack to cool.
Unroll cake; remove cloth. Spread whipped topping over cake to within 1/2 inch of edges. Re-roll cake; place seam-side down on a plate. Dust with confectioners' sugar before serving.
Calories From Fat
% Daily Value*
Total Fat 0g
Saturated Fat 0g
Trans Fat 0g
Dietary Fibers 0g
* Percent Daily Values are based on a 2,000 calorie diet.
* Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin and freshness of ingredients used.