Vinegar Pie
["1 c. sugar", "2 Tbsp. flour", "2 Tbsp. cider vinegar", "2 eggs, beaten", "1 Tbsp. butter", "1/2 tsp. lemon extract", "sweetened whipped cream"]
["Bake pie shell; cool.", "Mix sugar and flour in 2-quart saucepan. Add enough water to vinegar to measure 1 cup.", "Blend into eggs. Stir egg mixture gradually into sugar mixture.", "Cook over medium heat, stirring constantly until mixture thickens and boils.", "Boil and stir 1 minute.", "Remove from heat; stir in butter and lemon extract.", "Cool slightly.", "Pour into pie shell; refrigerate.", "Serve with whipped cream."]
["sugar", "flour", "cider vinegar", "eggs", "butter", "lemon extract", "whipped cream"]