Pumpkin-Toffee Cake Roll Recipe

Place egg whites in a large bowl; let stand at room temperature for 30 minutes. Line a greased 15-in. x 10-in. x 1-in. baking pan with waxed paper; grease the paper and set aside. In a large bowl, beat yolks until slightly thickened. Gradually add sugars, beating on high speed until thick. Beat in pumpkin. Sift flour, cinnamon, ginger, allspice and salt together twice; gradually add to yolk mixture and mix well. With clean beaters, beat egg whites until stiff peaks form. Gradually fold into batter. Spread into prepared pan. Bake at 350 ° for 15-18 minutes or until cake springs back when lightly touched. Cool for 5 minutes. Invert onto a kitchen towel dusted with confectioners' sugar. Gently peel off waxed paper. Roll up cake in the towel jelly-roll style, starting with a short side. Cool completely on a wire rack. For filling, in a small saucepan, sprinkle gelatin over rum; let stand for 1 minute. Heat over low heat, stirring until gelatin is completely dissolved. Remove from the heat; set aside. In a large bowl, beat cream until it begins to thicken. Add confectioners' sugar; beat until stiff peaks form. Fold in rum mixture and 1/3 cup toffee bits. Unroll cake; sprinkle with 1/4 cup toffee bits. Spread filling over cake to within 1/2 in. of edges. Roll up again. Place seam side down on a serving platter. Dust with additional confectioners' sugar. Drizzle with caramel syrup; sprinkle with remaining toffee bits. Refrigerate until serving.