INGREDIENTS
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1 cup all-purpose flour
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1/4 teaspoon baking soda
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1/8 teaspoon salt
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4 tablespoons butter, softened
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2/3 cup granulated sugar
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1 teaspoon vanilla extract
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1 large egg white
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Cooking spray
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1 cup powdered sugar
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2 teaspoons unsweetened cocoa
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1 tablespoon fat-free milk
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1/2 ounce semisweet chocolate
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1/2 ounce white chocolate