"To get a super-light mousse, you'll need to properly fold together the whipped cream, egg whites, and melted chocolate. Check out our homemade pie crust recipe...."
INGREDIENTS
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1 pie crust, homemade or store-bought (click for homemade pie crust recipe)
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4 large egg whites
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3/4 cup plus 3 Tbsp. sugar
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10 ounces semisweet or bittersweet chocolate (do not exceed 71% cacao), chopped, plus more shaved with a vegetable peeler for garnish
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3 tablespoons unsalted butter
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4 cups heavy cream, divided
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1 cup coarsely crushed chocolate wafer cookies (such as Nabisco Famous Chocolate Wafers), divided