INGREDIENTS
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4 ounces semi-sweet chocolate, chopped
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2 cups (256g) all-purpose flour
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1/2 cup (50g) unsweetened cocoa powder
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1 teaspoon baking soda
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1/2 teaspoon salt
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1 1/2 cups (300g) packed light brown sugar
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1 cup (226g) butter, softened
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4 large eggs
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8 ounces freshly brewed espresso
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1 teaspoon vanilla extract
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3/4 cup (180g) buttermilk