Egg White Cookies
["3 egg whites", "3/4 c. granulated sugar", "1/8 tsp. salt", "1/8 tsp. cream of tartar", "1/2 tsp. vanilla"]
["Beat egg whites until foamy; sprinkle salt and cream of tartar over them.", "Continue beating until stiff but not dry. Gradually beat in sugar, 2 tablespoons at a time, adding vanilla with the last of the sugar.", "Shape by spoon or pastry bag into mounds on a baking sheet covered with unglazed paper.", "Bake in slow oven", "275\u00b0", "about 40 minutes or until very delicately browned and dry on top.", "Remove carefully from paper while warm."]
["egg whites", "sugar", "salt", "cream of tartar", "vanilla"]