INGREDIENTS
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4 cups unsalted chicken stock, divided
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2 cups (about 8 oz.), plus 6 Tbsp. self-rising flour, divided
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3 pounds bone-in, skin-on chicken breasts
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4 cups water
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1 tablespoon kosher salt
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2 bay leaves
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1 1/2 teaspoons black pepper, divided
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1/4 cup unsalted butter, chilled and cut into cubes
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2/3 cup whole buttermilk
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4 teaspoons chopped fresh tarragon
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1/4 teaspoon lemon zest (from 1 lemon)