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Roasted Garlic Potatoes au Gratin Recipe

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4.1 from 57 reviews

  • Author: Sara
  • Total Time: 1 hour 35 minutes
  • Yield: 6–8 servings
  • Diet: Vegetarian, Gluten Free

Description

Thinly sliced potatoes baked in a creamy roasted garlic sauce and topped with bubbly melted cheese. This rich and comforting au gratin dish features a perfect balance of creamy garlic-infused sauce and melted Gruyère and Parmesan cheeses, making it an ideal side for holidays, special dinners, or any occasion requiring an indulgent accompaniment.

Ingredients

Potatoes

  • 2½ lbs Yukon Gold or russet potatoes, thinly sliced

Roasted Garlic

  • 1 whole head garlic
  • 1 tbsp olive oil

Sauce

  • 2 tbsp butter
  • 2 cups heavy cream
  • 1 cup whole milk
  • 1 tsp salt
  • ½ tsp black pepper
  • ½ tsp ground nutmeg (optional)
  • 1 tsp fresh thyme (or ½ tsp dried)

Cheese Topping

  • 1½ cups shredded Gruyère cheese
  • ½ cup shredded Parmesan cheese

Instructions

  1. Preheat and Roast Garlic: Preheat your oven to 400°F (200°C). Cut the top off the garlic head, drizzle it with olive oil, wrap in foil, and roast for 35 to 40 minutes until the garlic is soft and caramelized.
  2. Reduce Oven Temperature: After roasting garlic, reduce your oven temperature to 375°F (190°C) to prepare for baking the potatoes au gratin.
  3. Mash Roasted Garlic: Squeeze the softened garlic cloves out of their skins into a bowl and mash into a smooth paste to infuse the sauce with deep roasted garlic flavor.
  4. Prepare Cream Sauce: In a saucepan, melt butter over medium heat. Add the heavy cream, whole milk, mashed roasted garlic, salt, black pepper, nutmeg (if using), and thyme. Heat the mixture until warm, making sure it does not boil to maintain a smooth texture.
  5. Layer Potatoes and Sauce: Grease a baking dish. Arrange half of the thinly sliced potatoes evenly in the dish. Pour half of the creamy roasted garlic sauce over the potatoes. Sprinkle half of the shredded Gruyère and Parmesan cheeses on top.
  6. Repeat Layers: Repeat with the remaining potatoes, pour the remaining cream sauce over them, and top with the remaining cheeses.
  7. Bake Covered: Cover the baking dish with foil and bake in the preheated oven for 40 minutes to allow the potatoes to cook through and the flavors to meld.
  8. Bake Uncovered: Remove the foil and continue baking for an additional 20 to 25 minutes until the top is golden brown and bubbly.
  9. Rest: Remove from oven and let the potatoes au gratin rest for 10 minutes before serving to allow the sauce to thicken slightly and set.

Notes

  • Slice potatoes evenly for uniform cooking and consistent texture.
  • Gruyère cheese can be substituted with Swiss or white cheddar for a different flavor profile.
  • For an extra crispy top, broil the dish uncovered for 2 to 3 minutes after baking.
  • Store leftovers in the refrigerator for up to 3 days in an airtight container.
  • Prep Time: 20 minutes
  • Cook Time: 1 hour 15 minutes
  • Category: Side Dish, Casserole
  • Method: Baking
  • Cuisine: French-Inspired

Find it online: https://sarasplate.com/roasted-garlic-potatoes-au-gratin-recipe/