French Silk Slab Pie

A stunning, crowd-pleasing dessert that combines the rich, creamy texture of French silk chocolate with the ease of a slab pie. Perfect for potlucks and parties.

Yield: One 9×13-inch slab pie (serves 16-20)
Prep Time: 45 minutes (plus 4+ hours chilling)
Cook Time: 25 minutes

Ingredients

For the Crust:

2 9-inch refrigerated pie crusts, softened as package directs (or homemade pastry for a 9×13 pan)
Optional: 1 egg white, lightly beaten, for egg wash

For the Chocolate Filling:

10 oz bittersweet chocolate (60-70%), finely chopped
4 large eggs, at room temperature
1 ⅓ cups granulated sugar
2 teaspoons vanilla extract
½ cup (1 stick) unsalted butter, softened to room temperature

For the Whipped Cream Topping:

2 ½ cups heavy whipping cream, very cold
⅓ cup powdered sugar
1 teaspoon vanilla extract

For Garnish:

Chocolate curls or shavings (from extra bittersweet chocolate)
Cocoa powder for dusting

Instructions

1. Prepare the Crust:

Preheat oven to 375°F (190°C).
Unroll the two pie crusts. Place them side-by-side in a 9×13-inch baking dish, pressing them together to form one continuous crust that covers the bottom and goes up the sides. Trim and crimp the edges as desired.
Prick the bottom all over with a fork. Line with parchment paper or foil and fill with pie weights or dried beans.
Blind bake for 15 minutes. Remove weights and parchment. Brush lightly with egg white (optional – this creates a moisture barrier). Return to oven for 8-10 more minutes, until lightly golden. Let cool completely on a wire rack.

2. Make the Chocolate Filling (Important Safety Note):

This recipe uses raw eggs. If you have health concerns, use pasteurized eggs or see the cooked option in the notes.
In a large heatproof bowl set over a pot of gently simmering water (double boiler), melt the chopped chocolate, stirring until smooth. Remove from heat and let cool slightly.
In another large bowl, using a hand mixer or stand mixer with the whisk attachment, beat the eggs on high speed for 5 full minutes, until very pale, thick, and fluffy.
Gradually add the granulated sugar and beat for another 3-5 minutes, until the mixture is very thick and falls in ribbons.
Beat in the vanilla extract and softened butter until combined.
Fold in the slightly cooled melted chocolate until the mixture is uniform and smooth.

3. Assemble:

Pour the chocolate filling into the completely cooled crust, spreading it into an even layer.
Refrigerate, uncovered, for at least 1 hour to set slightly before adding the whipped cream.

4. Make the Whipped Cream Topping & Finish:

In a chilled bowl, beat the cold heavy cream, powdered sugar, and vanilla on medium-high speed until stiff peaks form.
Spread the whipped cream evenly over the chilled chocolate layer.
Garnish generously with chocolate curls or shavings and a light dusting of cocoa powder.
Refrigerate the entire pie for at least 4 hours, or overnight, until completely set.

Key Tips for Success

Egg Safety: This is the classic method. For a cooked filling, you can make a sabayon: Whisk eggs and sugar in a double boiler over simmering water until 160°F (71°C), then whip until cool and thick before adding butter and chocolate.
Room Temperature is Key: Using room-temperature eggs and butter ensures a smooth, emulsified filling that won’t seize or separate.
Cool Completely: The crust must be cool before adding the filling, and the filling must be chilled before adding the whipped cream, or the layers will melt together.
Chocolate Quality: Use a good-quality baking chocolate (bars, not chips) for the best flavor and texture. Chips contain stabilizers.
Make Ahead: This pie is perfect made 1 day ahead. Add whipped cream and garnish within 4-6 hours of serving for best texture.

Storage:

Cover loosely with plastic wrap or store in a cake carrier in the refrigerator for up to 3 days. The crust will soften over time but will still be delicious.

Enjoy this decadent, show-stopping dessert!