INGREDIENTS
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Nonstick cooking spray
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1 cup butter, softened
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1 1/2 cups firmly packed brown sugar
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4 large eggs
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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 cup semisweet chocolate morsels
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One 6.5-ounce box brownie mix
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1/3 cup vegetable oil