Chocolate Pie
["3 egg yolks", "1 1/4 c. sugar", "1 pt. sweet milk", "2 Tbsp. cornstarch", "1 Tbsp. flour", "2 Tbsp. cocoa", "1 1/2 Tbsp. butter", "1 tsp. vanilla"]
["Mix cornstarch, flour and sugar.", "Add milk and egg yolks that have been beaten.", "Cook until thickened, stirring constantly.", "Cool slightly; pour into baked pie crust.", "Cover with meringue made from egg whites and bake in slow oven at 250\u00b0 to 300\u00b0 until brown."]
["egg yolks", "sugar", "sweet milk", "cornstarch", "flour", "cocoa", "butter", "vanilla"]