INGREDIENTS
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2 1/2 cups all-purpose flour, plus more for dusting (see Cook's Note)
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2 tablespoons baking powder
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1 tablespoon sugar
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1 1/2 teaspoons kosher salt
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1 1/2 sticks (12 tablespoons) unsalted butter, cut into small pieces and frozen
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1 cup buttermilk, plus more for brushing