INGREDIENTS
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3/4 cup all-purpose flour
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2/3 cup unsweetened cocoa powder
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5 teaspoons instant espresso or coffee powder
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1 1/2 teaspoons baking powder
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1/4 teaspoon salt
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1/4 cup unsalted butter, softened
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2/3 cup granulated sugar
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2/3 cup packed brown sugar
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1 cup egg whites
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1 1/2 teaspoons vanilla extract
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1/3 cup semi-sweet mini chocolate chips, or other dark chocolate finely chopped
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2 tablespoons powdered sugar
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Whipped cream for topping