Chocolate Mousse Pie
An unbelievably rich and exuberant pie proving that three simple components can come together to make a dessert equally worthy of serving at an elegant dinner party as it is a casual potluck. You begin by pressing an easy chocolate cookie crust into a pie plate and baking until just set. When it’s cool, pile in an intensely flavored, lightly textured chocolate mousse. Final step: layering sweetened whipped cream on top. If you’re feeling fancy, sprinkle on some chocolate shavings.
Ingredient note: The best cookies for the crust are Nabisco Famous Chocolate Wafers (you might have to source them online, like we did). In a pinch you can use Oreos with the creme filling scraped off and discarded.
For more sweet inspiration, check out our Banoconut Cream Pie, Lemon Meringue Pie, and Blackberry Chiffon Pie.
For the chocolate cookie crust:
- 6 ounces chocolate cookie wafers (about 25 wafers), such as Nabisco Famous Chocolate Wafers
- 4 tablespoons unsalted butter (1/2 stick), melted and slightly cooled
For the chocolate mousse:
- 5 ounces semisweet chocolate, coarsely chopped
- 1 cup cold heavy cream
- 3 large egg whites (no traces of yolk), at room temperature
For the whipped cream:
- 1 tablespoon granulated sugar
- 1 teaspoon vanilla extract
- 1 1/2 cups cold heavy cream
- 1 (1-ounce) piece semisweet chocolate, for garnish
To make the crust:
1Heat the oven to 350°F and arrange a rack in the middle.
2Place the cookies in a food processor fitted with a blade attachment and process until the pieces are about the size of peas. Stop the motor, add the melted butter, and continue to process until the crumbs are fine, about the size of coarsely ground coffee (you will need 1 1/2 cups). (Alternatively, place the cookies in a resealable plastic bag, press out the air, and seal. Using a rolling pin, smash into uniform fine crumbs. Transfer to a medium bowl, add the melted butter, and mix until evenly combined.)
3Pour the crumb mixture into a 9-inch pie plate and, using the bottom of a cup or your fingers, press firmly and evenly into the bottom and up the sides. Bake until fragrant, about 10 to 15 minutes. Remove to a wire rack to cool completely before making the filling, about 40 minutes.
To make the mousse:
1Fill a medium saucepan with 2 inches of water and bring to a simmer over medium heat.
2Place the chopped chocolate and 1/4 cup of the cream in a large heatproof bowl. (Place the remaining cream back in the refrigerator until ready to use.) Nest the bowl over the saucepan, making sure the bottom of the bowl isn’t touching the water. Melt the chocolate, stirring occasionally with a rubber spatula, until smooth and combined with the cream. Remove the bowl from the saucepan, wipe any moisture from the bottom of it, and set aside to cool slightly.
3Place the egg whites in the bowl of a stand mixer fitted with a whisk attachment (make sure the bowl and whisk have no trace of oil or fat on them, or the whites won’t whip properly). Mix on high until stiff peaks form, about 1 minute; transfer to a medium bowl and set aside. (Alternatively, you can whip the whites by hand in a large bowl for about 3 minutes.)
4Clean and dry the whisk attachment and mixer bowl. Place the remaining 3/4 cup of cream in the bowl and whisk on high speed until stiff peaks form, about 1 minute. (Alternatively, you can whisk the cream by hand in a large bowl for about 3 minutes.)
5Using a rubber spatula, fold half of the whipped cream into the melted chocolate, then gently stir in the rest (try not to deflate the whipped cream). Gently fold the egg whites into the chocolate-cream mixture just until there are no longer large blobs of whipped cream or egg white (do not overmix). Spoon the mousse into the cooled pie crust and smooth it into an even layer. Refrigerate uncovered until set, at least 2 hours.
To whip the cream and finish:
1When ready to serve, place the bowl of the stand mixer and the whisk attachment in the freezer for 10 minutes. Add the sugar, vanilla, and cream to the bowl and whisk on high speed until medium peaks form, about 1 to 2 minutes. (Alternatively, you can whisk the cream by hand in a large chilled bowl for about 3 to 4 minutes.) Spread or decoratively pipe the whipped cream from a pastry bag evenly over the pie.
2To garnish, hold the piece of chocolate with a paper towel in one hand and use a vegetable peeler to shave the desired amount over the top of the pie.
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