INGREDIENTS
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1/2 cup all-purpose flour
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1/2 cup whole-wheat pastry flour
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3/4 cup finely chopped pecans
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1/2 teaspoon ground cinnamon
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1/8 teaspoon salt
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1/3 cup margarine
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1/2 cup confectioners' sugar, plus more for dusting cookies
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1 egg white
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1 teaspoon vanilla extract