INGREDIENTS
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1 cup all-purpose flour
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1 cup whole-wheat flour
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1 3/4 teaspoon cream of tartar
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1 1/4 teaspoon baking soda
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3/4 teaspoons kosher salt
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Pinch sugar
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A few grinds black pepper (optional)
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8 tablespoons (1 stick) cold unsalted butter, cut into small cubes
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1 cup cold buttermilk
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Flaky salt