INGREDIENTS
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Ingredients:
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1 1/2 sticks (6 ounces) unsalted butter, softened
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1 1/4 cups (8-3/4 ounces) sugar
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1 teaspoon water, at room temperature
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2 teaspoons espresso powder
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3 large eggs, at room temperature
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1 cup (5 ounces) unbleached all-purpose flour
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1/2 cup (2 ounces) unsifted unsweetened Dutch-process cocoa powder
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1/4 teaspoon baking powder
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Pinch of salt
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1/2 cup (4 ounces) buttermilk, at room temperature*