INGREDIENTS
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8 Tbsp cold unsalted butter, divided
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4 Tbsp all-purpose flour, divided
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1/4 tsp poultry seasoning
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1/4 tsp onion powder
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1/4 tsp garlic powder
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1/2 tsp kosher salt
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1/2 tsp fresh ground black pepper
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1/2 cup milk
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1 cup low-sodium chicken broth, divided
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1/2 cup chopped onions
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1 (26 oz) package frozen shredded hash browns
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1 (8 oz) package shredded colby cheese