INGREDIENTS
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Ingredients
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* 2 cups all-purpose flour, plus more as needed
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* 1 tablespoon baking powder
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* 1 1/2 teaspoons kosher salt
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* 12 tablespoons (1 1/2 sticks) cold unsalted butter, diced
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* 1/2 cup cold buttermilk, shaken
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* 1 cold extra-large egg
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* 1 cup grated extra-sharp Cheddar
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* 1 egg, beaten with 1 tablespoon water or milk
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* Maldon sea salt, optional