Description
Creamy, cheesy, and irresistibly golden, these Au Gratin Potatoes are a crowd-pleasing side dish perfect for holidays and cozy dinners.
Ingredients
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3 lbs Russet or Yukon Gold potatoes, peeled and sliced 1/8″ thick
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2 cups sharp cheddar cheese, freshly grated (reserve ½ cup for topping)
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2 cups heavy cream (or whole milk)
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4 tbsp unsalted butter
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1 small onion, finely diced
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2 cloves garlic, minced
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4 tbsp all-purpose flour
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1/2 tsp salt (or to taste)
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1/2 tsp black pepper
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Pinch of nutmeg (optional)
Instructions
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Preheat oven to 375°F (190°C). Grease a 9×13-inch baking dish.
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In a saucepan, melt butter. Sauté onion until soft. Add garlic and cook 1 minute.
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Stir in flour to form a roux; cook 1–2 minutes. Slowly whisk in cream. Simmer until slightly thickened.
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Remove from heat. Stir in 1½ cups cheese, salt, pepper, and nutmeg. Mix until smooth.
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Layer half the potatoes in the dish. Pour half the cheese sauce over. Repeat with remaining potatoes and sauce.
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Top with reserved cheese. Cover with foil and bake 45 minutes. Uncover and bake 25–30 minutes more until golden and bubbly.
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Let rest 10 minutes before serving.
Notes
Use a mandoline for perfect slices. Add bacon or herbs for variation. Can be made 1 day ahead.