How can I cook and serve a delicious chocolate pudding pie?

To cook and serve a delicious chocolate pudding pie, start by making a chocolate pudding filling using milk, sugar, cocoa powder, and cornstarch. Cook the mixture until thickened, then pour it into a pre-baked pie crust. Chill the pie in the refrigerator until set, then top with whipped cream or chocolate shavings before serving. Enjoy!