Chocolate Pie

Transcribed from two handwritten pages labeled Hershey's website. Vanilla quantity conflicts: ingredient list says 1 1/2 teaspoons; final directions say 3 teaspoons. Both are preserved pending clarification.

Ingredients

1 cooled, baked pie shell 1/2 cup Hershey's cocoa 3 cups milk, divided 1 1/3 cups sugar 3 tablespoons all-purpose flour 3 tablespoons cornstarch 1/2 teaspoon salt 3 egg yolks 1/3 cup butter Vanilla: 1 1/2 teaspoons in ingredient list; 3 teaspoons in directions (unresolved)

Instructions

1. Combine cocoa and 2 cups milk in a medium saucepan. Cook over medium heat, stirring constantly, until just before boiling. Set aside. 2. Stir together sugar, cornstarch, flour and salt in a medium bowl. 3. Blend remaining 1 cup milk into 3 egg yolks. Stir into the sugar mixture. Gradually add the chocolate mixture, following the handwritten insertion arrow. 4. Cook over medium heat, stirring constantly with a wire whisk. Bring mixture to a boil and cook for 1 minute. 5. Remove from heat. Stir in 1/3 cup butter and vanilla. Note: this step says 3 teaspoons vanilla, but the ingredient list says 1 1/2 teaspoons. 6. Pour into the cooled, baked pie shell. Cover the top with plastic wrap and refrigerate until well chilled.