INGREDIENTS
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Makes about 24 cookies
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Each cookie is approx. 72 calories
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Nonstick vegetable oil spray
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1 1/2 cups bittersweet chocolate chips (about 9 ounces)
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3 large egg whites, room temperature
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2 cups powdered sugar, divided (plus 1/2 cup for cookie coating)
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1/2 cup unsweetened cocoa powder
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1 tablespoon cornstarch
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1/4 teaspoon salt