INGREDIENTS
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4 chicken legs (thigh and drumstick)
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1 leek, pale-green and white parts only
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4 carrots, 1 whole, 3 chopped into 1/2-inch rounds
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4 celery stalks, 1 whole, 3 chopped into 1/2-inch pieces
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1 medium onion, chopped, divided
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3 garlic cloves, smashed
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4 sprigs thyme
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Parsley stems from 1/2 bunch
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1 bay leaf
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2 teaspoons whole peppercorns
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Kosher salt
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1/2 cup chicken fat (schmaltz) or butter, melted, divided
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Freshly ground black pepper
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1 1/2 cups all-purpose flour, divided
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2 teaspoons baking powder
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1/4 teaspoon baking soda
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1/2 cup plus 2 tablespoons buttermilk
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1/2 cup heavy cream
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Chopped chives (for serving)