INGREDIENTS
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Nonstick cooking spray
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8 chocolate wafer cookies
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1 bar (8 ounces) reduced-fat cream cheese
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1 cup reduced-fat sour cream
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1/3 cup unsweetened cocoa powder
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2 tablespoons cornstarch
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3/4 cup sugar
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1 large whole egg, plus 1 large egg white
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1/3 cup semisweet chocolate chips