INGREDIENTS
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1/2 cup butter, softened
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3/4 cup dark brown sugar
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1 large egg
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1 teaspoon vanilla extract
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1 teaspoon instant espresso or coffee powder
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1 1/2 cups all-purpose flour
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1/2 teaspoon baking soda
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1/4 teaspoon salt
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1/2 cup chopped bittersweet chocolate
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1/2 cup chopped hazelnuts