Instructions

  1. In a 1-quart saucepan, heat 1 1/2 cups milk and sugar.
  2. In a mixing bowl, combine the flour, cornstarch and salt. Add egg yolks and remaining milk; mix well. Temper this mixture by adding a third of the hot milk mixture.
  3. Return all to the saucepan. Bring to a boil; boil and stir for 1 minute.
  4. Remove from the heat. Add chocolate and stir until melted. Finish with butter and vanilla. Pour into pastry shell.
  5. Refrigerate until set.