INGREDIENTS
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3/4 cup milk
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2 teaspoons apple cider vinegar
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1 3/4 cups unbleached, all-purpose flour
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2/3 cup double-Dutch dark cocoa powder
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1 1/4 cups brown sugar, lightly packed
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1 teaspoon baking soda
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1/2 teaspoon fine sea salt
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1 tablespoon espresso powder, optional
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1 1/2 cups chocolate chips
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2 large eggs, lightly beaten
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1 tablespoon pure vanilla extract
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1/2 cup safflower oil, or oil of your choice