INGREDIENTS
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1½ c whole grain pastry flour
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½ c unsweetened cocoa powder
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1 Tbsp instant espresso powder
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1 tsp baking soda
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8 Tbsp butter, softened
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1 c sugar
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1 egg
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1 tsp vanilla extract
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½ c low-fat buttermilk
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½ c hot tap water
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¾ c maple syrup
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3 egg whites
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½ tsp cream of tartar