24 cookies chocolate sandwich cookies – finely ground into crumbs
6 tbsp unsalted butter – melted
6 ounces semisweet chocolate – chopped
6 tbsp unsalted butter – cut into pieces
0.75 cup granulated sugar
0.25 cup unsweetened cocoa powder – sifted
0.25 tsp fine salt
3 large large eggs – at room temperature
0.5 cup heavy cream
2 tsp vanilla extract
1 cup heavy cream – cold (for topping)
2 tbsp powdered sugar
0.5 tsp vanilla extract
dark chocolate – shaved (for serving)
Instructions
Heat the oven to 350°F (175°C). Set a 9-inch pie plate on a baking sheet.
Make the crust: In a bowl, combine the finely ground chocolate sandwich cookies with 6 tbsp melted unsalted butter until evenly moistened. Press firmly into the bottom and up the sides of the pie plate. Bake until fragrant and set, 10 minutes. Cool on a rack for 10 minutes.
Make the filling base: In a heatproof bowl set over gently simmering water (or in the microwave in 20-second bursts), melt 6 oz semisweet chocolate with 6 tbsp unsalted butter (cut into pieces), stirring until smooth. Remove from heat and let cool 5 minutes.
In a separate bowl, whisk 3 large eggs until blended. Whisk in 0.75 cup granulated sugar, then sift in 0.25 cup unsweetened cocoa powder and 0.25 tsp fine salt; whisk until smooth.
Slowly whisk the warm chocolate-butter mixture into the egg mixture until combined. Whisk in 0.5 cup heavy cream and 2 tsp vanilla extract until glossy.
Pour the filling into the crust. Bake at 350°F until the edges are set and the center still jiggles slightly when nudged, 20–25 minutes; a toothpick inserted 1 inch from the center should come out with a few moist crumbs, not wet batter.
Cool on a rack until barely warm, about 1 hour, then chill uncovered until cold and fully set, 2 hours.
Topping: In a chilled bowl, whip 1 cup cold heavy cream with 2 tbsp powdered sugar and 0.5 tsp vanilla extract to soft peaks, 2–3 minutes.
Spread the whipped cream over the chilled pie. Garnish with dark chocolate shaved. Slice with a warm knife and serve.