INGREDIENTS
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PIE SHELL
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1 1/4 cups flour
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2 tablespoons confectioners' sugar
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1/2 teaspoon salt
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8 tablespoons unsalted butter, chilled, divided into 1/4" pieces
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2 tablespoons vegetable shortening, frozen and cut into small pieces
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1 large egg white, chilled, and thoroughly mixed with ice water (about 2 tablespoons)
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1 large egg yolk, beaten with 1/8 teaspoon water
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FILLING
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4 tablespoons unsalted butter, cut into 1-inch pieces
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1/2 packed dark brown sugar
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1/4 teaspoon salt
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3 large eggs
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1 cup maple syrup, grade B.
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1 tablespoon vanilla extract
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1 1/2 cups whole pecans, toasted, and chopped into small pieces, plus extra whole pecans for topping