Chocolate Cream Pie

Ingredients...(1) 1 (9 inch) baked pastry shell(2) 1 1/4 cups white sugar(3) 2 tablespoons all-purpose flour(4) 2 tablespoons corn starch(5) 1/4 teaspoon salt(6) 1 1/2 cups milk(7) 4 egg yolks(8) 2 (1-ounce) squares unsweetened chocolate(9) 1 tablespoon butter(10) 1 teaspoon vanilla extract(11) Sweetened whipped creamMethod...
1.In medium saucepan, combine sugar, flour, cornstarch and salt. Ina medium bowl, beat milk and egg yolks until smooth. Gradually stirinto sugar mixture. Stir constantly over medium heat until mixturethickens and comes to a full boil. Boil and stir for one minute.Remove from heat and stir in chocolate, butter and vanilla. Stir untilmelted.
2.Pour into pie shell. Place plastic wrap over filling to prevent skinfrom forming and chill for several hours.
3.Serve with a dollop of sweetened whipped cream, if desired.