INGREDIENTS
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2 cups flour
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2 tablespoons cornstarch
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1 tablespoon baking powder
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1/4 teaspoon baking soda
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1 tablespoon sugar
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1 teaspoon kosher salt
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1/2 teaspoon freshly ground black pepper
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1/2 cup (1 stick) cold unsalted butter, cut into 1/4-inch cubes
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3/4 cup packed shredded sharp cheddar
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1 cup diced ham
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3 tablespoons chopped fresh dill
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2/3 cup buttermilk
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1 egg yolk
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2 tablespoons whole milk