INGREDIENTS
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16 tbsp. unsalted butter, cut into 1?2" ? cubes and chilled, plus more for pie plate
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1⁄4 cup packed light brown sugar
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1 9-oz. package chocolate wafers, ? such as Nabisco, finely ground ? (about 2 1?4 cups)
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3 1⁄2 cups half-and-half
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2⁄3 cup plus 2 tbsp. sugar
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1⁄4 cup cornstarch
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9 egg yolks
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9 oz. semisweet chocolate, ? finely chopped
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2 oz. unsweetened chocolate, ? finely chopped
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2 1⁄2 tsp. vanilla extract
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2 cups heavy cream
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Dark chocolate, for garnish