INGREDIENTS
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3/4 cup (1-1/2 sticks) unsalted butter, softened
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1 cup packed light-brown sugar
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1 egg
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1 teaspoon vanilla extract
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2 tablespoons hazelnut liqueur (such as Frangelico)
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2 cups all-purpose flour
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1 cup hazelnuts, chopped
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1/2 teaspoon salt
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1 ounce white chocolate