INGREDIENTS
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1 cup (2 sticks) unsalted butter, room temperature
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1 bar (8 ounces) cream cheese, room temperature
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2 tablespoons granulated sugar
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1/2 teaspoon salt
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2 cups all-purpose flour (spooned and leveled), plus more for rolling
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1 large egg, lightly beaten
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1 cup walnuts, finely chopped
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1/2 cup packed light-brown sugar