Chocolate Cream Pie Filling

Ingredients
1 Cup sugar
1/4 Cup cornstarch
1/4 teaspoon salt
1 1/2 Cups milk
3 eggs
2 oz semi sweet chocolate
2 Tablespoons butter
1 teaspoon vanilla extract

Directions
In medium saucepan mix sugar, cornstarch and salt. Stir in milk. Add eggs and chocolate and cook over low until thick and smooth beating all the time. Remove and stir in vanilla and butter. Pour into baked 8 inch pie shell and serve with whip cream.