INGREDIENTS
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Nonstick cooking spray, for greasing the foil
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6 ounces semisweet chocolate, chopped
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4 ounces (1 stick) unsalted butter
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1 cup granulated sugar
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3 large eggs
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1 cup all-purpose flour
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1/2 teaspoon baking powder
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1/4 teaspoon salt
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2 ounces bittersweet chocolate, cut into pieces