INGREDIENTS
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scant 1/2 cup sweet butter
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1/4 cup soft brown sugar
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1/4 cup superfine sugar
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1 egg, lightly beaten
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a few drops of vanilla extract
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1 1/2 cups all-purpose flour
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2 teaspoons baking powder
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2 tablespoons milk (optional)
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1/2 cup shelled hazelnuts, coarsely chopped
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2 ounces semisweet chocolate, coarsely chopped
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salt