Mystery Pie
["3 egg whites", "1 c. sugar", "1 tsp. baking powder", "2 c. crushed Ritz crackers", "1/2 c. chopped walnuts", "1 tsp. vanilla"]
["Beat egg whites until stiff.", "Add sugar.", "Stir.", "Then add baking powder, crackers, nuts and vanilla.", "Mix well.", "Pour into well-greased glass pie pan and bake 30 minutes at 350\u00b0 in preheated oven.", "Cool, then cover with whipped cream."]
["egg whites", "sugar", "baking powder", "crackers", "walnuts", "vanilla"]