5
Sprinkle the powdered sugar-flour mixture, 1/4 cup at a time, over the meringue; to fold in, use a rubber spatula to cut down vertically through the batter, then slide the spatula across the bottom of the bowl and up the side just until sugar-flour mixture disappears. When all sugar-flour mixture has been folded in, spoon the batter into an ungreased 10x4-inch angel food (tube) cake pan. Using a metal spatula or knife, gently cut through the batter, spreading batter gently against side of pan and tube, to break large air pockets.