"Creamy Au Gratin Potatoes are made with thinly sliced potatoes baked in a rich cheese sauce. Potato Gratin is an impressive holiday side dish...."
INGREDIENTS
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5 Tbsp unsalted butter (divided)
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¼ cup all-purpose flour
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2 ½ cups milk (any kind)
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1/2 cup heavy whipping cream
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1 ¼ tsp fine sea salt (or to taste)
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¼ tsp freshly ground black pepper
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1 tsp onion powder
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½ tsp garlic powder
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2 cups grated Gruyere cheese (from a 6 oz block or cheddar cheese, divided)
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3 lbs Yukon gold potatoes (scrubbed (peeled or unpeeled))
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Chives (to garnish, optional)