Make the Pie Crust:

• Preheat the oven to 375°F (190°C).

• In a large bowl, combine the flour and salt. Cut in the cold butter using a pastry blender or your fingers until the mixture resembles coarse crumbs.

• Gradually add the ice water, one tablespoon at a time, until the dough comes together. Gather the dough into a ball and wrap it in plastic wrap. Chill in the refrigerator for at least 30 minutes.

• On a floured surface, roll out the dough to fit a 9-inch pie dish. Press the dough into the dish and trim any excess. Poke a few holes in the bottom with a fork.

• Line the pie crust with parchment paper and fill it with pie weights or dried beans. Bake for 15-18 minutes, then remove the parchment paper and weights. Bake for an additional 5-7 minutes, until golden brown. Let the crust cool completely.

Make the Chocolate Filling:

• In a medium saucepan, whisk together the milk, sugar, cocoa powder, and salt over medium heat. Bring to a simmer, stirring constantly.

• In a separate bowl, whisk together the egg yolks and cornstarch until smooth.

• Slowly pour a bit of the hot milk mixture into the egg yolks to temper them, whisking constantly. Then, gradually whisk the egg yolk mixture back into the saucepan with the remaining milk mixture.

• Continue to cook over medium heat, whisking constantly, until the filling thickens (about 3-5 minutes). Once thickened, remove from heat and stir in the butter, vanilla extract, and chopped semi-sweet chocolate until smooth and combined.

• Pour the filling into the cooled pie crust and spread it evenly. Cover the pie with plastic wrap, pressing it directly onto the surface of the filling to prevent a skin from forming. Chill in the refrigerator for at least 3 hours, or overnight for best results.

Make the Whipped Cream Topping:

• In a chilled mixing bowl, beat the heavy cream, powdered sugar, and vanilla extract until soft peaks form.

• Spread the whipped cream over the chilled chocolate filling, or pipe it in decorative swirls.

Serve:

• Slice and serve the pie chilled. Enjoy this rich, creamy chocolate dessert!