Preheat oven to 350℉. Place the Oreo cookies in a food processor and blend until they become crumbs.
24 Oreo cookies
Transfer the crumbs to a bowl. Melt 5 tablespoons of butter, and stir it into the crumbs. Press the mixture into a 9-inch pie pan.
10 tablespoons unsalted butter
Bake for 10 minutes. Let the crust cool completely.
In a bowl or measuring glass, whisk together the egg yolks and cornstarch.
5 large egg yolks, 3 tablespoons cornstarch
In a saucepan over medium heat, whisk together the milk and sugar. Bring the mixture to a simmer. Once it’s simmering, transfer about ½ cup of the hot mixture to the egg yolk mixture and whisk it together in the measuring glass.
2½ cups whole milk, ½ cup granulated sugar
Slowly pour the egg mixture into the saucepan while whisking constantly. Let the mixture continue to simmer while whisking until thickened like pudding.
Add in the chocolate, vanilla extract, remaining 5 tablespoons of butter, and salt. Continue whisking until the chocolate has fully melted.
1 teaspoon pure vanilla extract, 8 ounces semisweet chocolate, ¼ teaspoon kosher salt, 10 tablespoons unsalted butter
Pour the chocolate filling into the pie crust and smooth it out with a spoon or spatula.
Chill the pie in the refrigerator for 4-5 hours, or until the filling has set.
While the pie is chilling, prepare the whipped cream topping by mixing the heavy cream, sugar, and vanilla together with an electric mixer.
1½ cups heavy cream, ¼ cup powdered sugar, ½ teaspoon pure vanilla extract
Once the sugar is fully incorporated, beat the mixture to stiff peaks. Spread the whipped cream over the chilled pie.