Buttermilk Pie
["1 c. sugar", "1 c. buttermilk", "3 Tbsp. flour", "1 Tbsp. butter", "1 or 2 egg yolks", "1 tsp. lemon flavoring"]
["Cook in heavy saucepan over medium heat until thickens, stirring constantly.", "Pour over prepared pie crust."]
["sugar", "buttermilk", "flour", "butter", "egg yolks", "lemon flavoring"]