Peanut Butter Pie
["2 1/4 c. milk", "4 Tbsp. flour", "1 c. sugar", "2 egg yolks", "1 Tbsp. vanilla", "2/3 to 1 c. creamy peanut butter"]
["Beat egg yolks. Add sugar and flour.", "Gradually add milk. Cook until thick.", "Add vanilla and peanut butter. Stir until peanut butter melts.", "Pour in baked pie crust. Top with egg whites that have been beaten and sweetened.", "Brown lightly in oven."]
["milk", "flour", "sugar", "egg yolks", "vanilla", "peanut butter"]