Preparation Steps

• In a saucepan, whisk together sugar and cornstarch, then gradually add milk and cream, stirring until smooth.
• Cook over medium heat, stirring constantly, until the mixture thickens and boils. Remove from heat and add chocolate and butter, stirring until melted and smooth.
• Add vanilla extract and let the chocolate mixture cool to room temperature.
• Beat the egg whites with cream of tartar until soft peaks form. Gradually add remaining sugar and continue beating until stiff peaks form.
• Pour the cooled chocolate mixture into the baked pie crust. Spread meringue over the filling, sealing edges to crust.
• Bake at 350°F (175°C) for 12-15 minutes or until meringue is golden. Let cool before serving.