INGREDIENTS
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Unsalted butter, at room temperature (but still firm), to brush pan
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1/4 cup sugar, to line pan
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2 cups all-purpose flour
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1 cup plus 2 tablespoons unsweetened Van Leer Dutch process medium cocoa
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1 teaspoon baking powder
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1/2 teaspoon baking soda
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1 teaspoon salt
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1 1/2 cups unsalted butter, at room temperature
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2 3/4 cups sugar
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2 teaspoons vanilla extract
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2 teaspoons espresso extract (or substitute 2 teaspoons instant coffee dissolved in 1 tablespoon buttermilk)
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5 eggs
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1 1/4 cups buttermilk
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Cocoa powder or confectioners' sugar, to finish