"My grandma's butter horns - or brown sugar walnut rugelach! These buttery cookies are irresistible. A special family recipe that is made with sour cream!..."
INGREDIENTS
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2 cups all-purpose flour
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1 cup unsalted butter, cold and cut into chunks
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1 cup full-fat sour cream, cold
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1 large egg yolk
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2 cups raw walnuts, finely chopped
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¾ cup packed light brown sugar
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confectioners’ sugar, for dusting