3/4 C. sifted cake flour

1/4 tsp. salt

9 egg whites

1 1/2 tsp. vanilla extract

3/4 tsp. cream of tartar

1/4 C. confectioners’ sugar for dusting

1 C. white sugar

2 1/3 C. fresh or frozen cranberries

6 T. water

2 T. cornstarch

1/2 C. heavy cream

3 T. confectioners’ sugar

 

Preheat the oven to 300 degrees F (150 degrees C). Lightly grease a 10×15 inch jellyroll pan with cooking spray, then line with parchment paper. In a medium bowl, whisk together 1/2 C. of superfine sugar, cake flour and salt. Set aside. In a separate bowl, whip egg whites until foamy. Add vanilla and cream of tartar, and continue to whip. Gradually sprinkle in the remaining superfine sugar while continuing to whip the egg whites to firm peaks. Sift the flour mixture over the egg whites and fold in by hand using a rubber spatula. Spread the batter evenly in the prepared pan. Bake for 20 minutes in the preheated oven, or until the center of the cake springs back when lightly pressed. Cool in the pan over a wire rack. Generously sift sugar over the top of the cake, and cover with a clean towel. Run a spatula around the outside of the cake in the pan to loosen, and turn out onto the towel. Remove the parchment paper from the back of the cake, and then place it back on loosely. Roll up with the towel loosely from short end to short end, and allow cooling in the rolled position. In a saucepan over medium heat, combine one C. of white sugar, cranberries and water. Simmer until the cranberries burst, about five minutes. Whisk in the cornstarch, and simmer just until thick, about two minutes. Transfer to a bowl, cover and refrigerate. Unroll the cake so that it is sitting flat on the towel. Spread the cooled cranberry filling over the top, leaving 1/2 inch border. Use the towel to help you keep a grip on the cake for an even roll. Roll up from short end to short end and place seam side down onto a platter.