Creamy Custard Filling - cooking recipe

Ingredients

3 Tbsp. all-purpose flour
3 Tbsp. cornstarch
1 c. sugar
3/4 tsp. salt
3 c. milk
3 egg yolks
1 tsp. vanilla extract
1 Tbsp. butter or margarine

Preparation

Combine flour, cornstarch, sugar and salt in a heavy saucepan. Gradually stir in milk. Cook over medium heat, stirring constantly, until thickened and bubbly. Beat egg yolks until thick and lemon colored. Gradually stir about 1/4 of hot mixture into yolks. Add to remaining hot mixture, stirring constantly, about 2 minutes or until thickened. Stir in vanilla and butter. Let cool. Yield: about 3 cups.