Aunt Eva'S Chocolate Pie
["1 tsp. vanilla", "1 Tbsp. cocoa", "1 1/3 c. sugar", "2 1/2 c. milk", "1/2 c. cornstarch or flour", "2 Tbsp. butter or margarine", "1/2 tsp. salt", "3 egg yolks, beaten with a fork"]
["Sift sugar, flour, salt and cocoa together.", "Set aside.", "In a large saucepan, bring milk almost to a boil.", "Add dry mixture and stir until it begins to thicken.", "Add butter and egg yolks; stir until thick enough for pie.", "Remove from heat and add vanilla. Pour into 9-inch unbaked pie shell.", "Cool.", "Add meringue and bake."]
["vanilla", "cocoa", "sugar", "milk", "cornstarch", "butter", "salt", "egg yolks"]