INGREDIENTS
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2 cups all-purpose flour
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1 teaspoon baking soda
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1/2 teaspoon salt
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1/2 cup (1 stick) butter, softened
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1/2 cup vegetable shortening
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1/2 cup granulated sugar
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3/4 cup packed brown sugar
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1 teaspoon vanilla extract
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1 egg
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2 cups (12-ounce package) semisweet chocolate chunks
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1/2 cup chopped nuts (optional)