Ingredients 3 tablespoons all-purpose flour 1/8 teaspoon salt 6 tablespoons sugar 1 cup half & half 4 egg yolks 1 teaspoon Pure Vanilla Extract, 4 Oz. Tools Round Tip 230 Disposable Decorating Bags Instructions Click to mark complete - In saucepan, blend all ingredients except vanilla. Cook on medium heat, stirring constantly until the mixture reaches the consistency of medium cream sauce. Remove from heat, add vanilla and cool quickly. To prevent a skin from forming, brush with melted butter. Stir before using. - Filling the centers of your cupcakes using the Bismarck Round Decorating Tip 230.