Chocolate Torte Royale
["2 egg whites", "1/4 tsp. salt", "1/2 tsp. vinegar", "1/2 c. sugar", "1/4 tsp. cinnamon"]
["Cover a cookie sheet with a piece of heavy paper; draw an 8-inch circle in the center. Beat egg whites with salt and vinegar until soft peaks form. Blend sugar and cinnamon; gradually add to egg whites, beating until very stiff peaks form and all sugar has dissolved. Spread within circle; make bottom 1/2-inch thick and mound around edge, making it 1 3/4-inches high. Form ridges on outside with back of teaspoon. Bake at 275\u00b0 for 1 hour. Turn off heat; let dry in oven (door closed) about 2 hours. Peel off paper."]
["egg whites", "salt", "vinegar", "sugar", "cinnamon"]