Prepare the crust by pulsing the Biscoff cookies in a food processor until fine crumbs form, or by sealing them in a plastic bag and crushing with a rolling pin. Transfer the crumbs to a medium bowl and stir in the melted butter until evenly moistened. If using graham crackers instead, mix the crumbs with the granulated sugar before adding the butter. Press the mixture firmly into the bottom and up the sides of a 9-inch (23 cm) pie dish, making sure the crust is compact and even. Place the crust in the freezer to chill while the filling is prepared.
1½ cups (165 g) Biscoff cookie crumbs, 1½ cups (180 g) graham cracker crumbs, 6 tbsps (85 g) unsalted butter, or
To make the whipped cream, add the cold heavy whipping cream, confectioners’ sugar, and vanilla extract to a large chilled bowl. Beat on medium-high speed for 2 to 3 minutes, just until soft peaks form. The cream should be thick and billowy but still smooth. Avoid overbeating, as grainy whipped cream will not fold cleanly into the filling. Measure out 1½ cups (360 ml) of the whipped cream and set it aside for the filling, reserving the remaining whipped cream for topping the pie later.
2 cups (480 ml) cold heavy whipping cream, ¼ cup (30 g) confectioners' sugar, 1 tsp (5 ml) vanilla extract
In a separate large bowl, beat the softened cream cheese with the confectioners’ sugar, vanilla extract, and ground nutmeg until completely smooth, scraping down the sides as needed to prevent lumps. In another bowl, whisk together the cold eggnog and instant vanilla pudding mix for 1 to 2 minutes, until the mixture thickens noticeably. Add the eggnog pudding mixture to the cream cheese mixture and beat until fully combined and creamy.
8 oz (225 g) full-fat cream cheese, ½ cup (60 g) confectioners' sugar, ½ tsp (2.5 ml) vanilla extract, ½ tsp (1 g) ground nutmeg, 1 cup (240 ml) cold eggnog, 1 box (3.4 oz / 96 g) instant vanilla pudding mix
Using a spatula, gently fold the reserved 1½ cups (360 ml) of whipped cream into the filling until evenly incorporated. Fold gently rather than stirring to keep the filling light while still giving it enough structure to set cleanly.
1½ cups (360 ml) prepared whipped cream
Pour the filling into the chilled crust and smooth the top with an offset spatula or the back of a spoon. Cover the pie and refrigerate for at least 4 hours, or preferably overnight, until fully set.
Just before serving, spread or pipe the remaining whipped cream over the top of the pie. Finish with a light dusting of ground nutmeg or cinnamon, then slice and serve cold.
remaining whipped cream, ground nutmeg or cinnamon