INGREDIENTS
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6 tablespoons melted butter (divided)
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2 tablespoons flour
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1 cup milk
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1 teaspoon chicken base
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1 cup sour cream
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1 cup plain nonfat Greek yogurt
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1/2 teaspoon onion powder
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2 lbs. frozen diced hash brown potatoes, mostly thawed
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2 cups sharp cheddar cheese
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1/3 cup crushed Ritz crackers (about 1/3 of a tube)