Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2 1/2  cups          milk
   3      squares       unsweetened baking chocolate -- melted
   2      tablespoons   all-purpose flour
   3      tablespoons   cornstarch
   1 1/2  cups          sugar
     1/2  teaspoon      salt
   4                    eggs -- separated
   2      tablespoons   butter
   1 1/2  teaspoons     pure vanilla extract
   1                    baked 9-inch pie shell
     1/2  teaspoon      cream of tartar

Preparation:

1. Scald 2 cups milk with melted baking chocolate in top of double boiler over simmering water, stirring until smooth. 2. Sift flour, cornstarch, 1 cup sugar and salt twice; mix with remaining milk. 3. Add to chocolate mixture, stirring constantly, until thickened; cook 10 minutes longer. 4. Remove from heat; gradually add some of chocolate mixture to beaten egg yolks. 5. Return to double boiler; cook 2 minutes longer, stirring occasionally. 6. Remove from heat; add butter and vanilla. 7. Pour into baked pie shell. 8. Cover with meringue made by beating egg whites with cream of tartar until frothy; gradually add remaining sugar, 1 tablespoon at a time, beating until stiff. 9. Brown in preheated 425 F. oven about 5 minutes; cool to room temperature; 10. Chill; serve cold.