INGREDIENTS
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3/4 cup all-purpose flour
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3/4 cup whole-wheat pastry flour
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3 tablespoons unsweetened cocoa powder
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1/2 teaspoon baking soda
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1/2 teaspoon salt
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6 large egg whites
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3/4 cup granulated sugar
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1 1/2 cups dark brown sugar, packed
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1 tablespoon vanilla extract
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3 ounces unsweetened chocolate, chopped and melted