Jewish Cake
["6 egg whites, beaten dry", "2 c. sugar", "1 1/2 tsp. vanilla", "1 1/2 tsp. vinegar", "1 pt. whipping cream", "1 tsp. vanilla", "2 c. walnuts, (about) chopped"]
["Beat the sugar into the beaten dry egg whites.", "Add the vanilla and vinegar. Butter a square cake pan (8 x 8-inch).", "Line with wax paper.", "Put mixture into wax paper lined pan.", "Bake 35 minutes in a 350\u00b0 oven. When cool, cut in half."]
["egg whites", "sugar", "vanilla", "vinegar", "whipping cream", "vanilla", "walnuts"]