Ingredients

Instructions

  1. Preheat oven to 350°F.
  2. Line a 15x10-inch jelly roll pan with waxed paper. Grease and flour lined pan; tap out excess.
  3. In a medium bowl, combine flour, cocoa powder, cornstarch, baking soda, baking powder, and salt. Mix well.
  4. In a separate bowl, using an electric mixer, 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.
  5. Fold 1/3 beaten egg whites into egg yolk mixture. Alternately fold in remaining whites and flour mixture.
  6. Pour batter into pan; smooth top. Bake until a toothpick inserted in center comes out clean, about 14 minutes.
  7. Dust a clean cloth with remaining sugar.
  8. Turn cake out onto prepared cloth; remove waxed paper. Trim cake's edges.
  9. Starting with a long side, tightly roll up cake WITH CLOTH!
  10. Transfer cake, seam-side down, to a wire rack to cool. Unroll cake; remove cloth.
  11. Mix whipped topping and chocolate chips together and spread over cake to within 1/2 inch of edges.
  12. Re-roll cake; place seam-side down on a plate. Refrigerate.