INGREDIENTS
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Vegetable-oil cooking spray
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1/4 cup unsweetened cocoa powder, plus more for dusting
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1/2 cup cake flour (not self-rising)
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2 tablespoons cornstarch
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Pinch of salt
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4 large eggs
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1/2 cup sugar
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3 tablespoons unsalted butter, melted
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Armagnac Syrup
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Chestnut Mousse
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Chocolate Glaze</u>
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Chestnuts, in syrup, drained, for garnish