Butterscotch Pie
["2 c. brown sugar", "4 Tbsp. flour", "1/2 tsp. salt", "4 Tbsp. butter", "2 egg yolks"]
["Mix in order given.", "Cook, stirring constantly, until mixture comes to a light boil.", "Cool.", "Pour into baked pie crust.", "Cover with meringue and brown.", "Cool before cutting."]
["brown sugar", "flour", "salt", "butter", "egg yolks"]