INGREDIENTS
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1/2 cup (1/4 lb.) butter, at room temperature
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3/4 cup sugar
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3 large eggs
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1 tablespoon grated orange peel
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1 teaspoon vanilla
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3 cups all-purpose flour
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1 tablespoon baking powder
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1 cup chopped toasted hazelnuts (see notes)
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1 1/4 cups semisweet chocolate chips (8 oz.)