Print

Roasted Garlic Potatoes au Gratin

Print Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

No reviews

Roasted garlic potatoes au gratin is a rich, creamy, and cheesy side dish that transforms simple scalloped potatoes into an indulgent, flavor-packed masterpiece. With layers of tender potatoes, roasted garlic cream sauce, and melted cheese, it’s a comforting favorite perfect for holidays or special occasions.

Ingredients

  • 2 ½ lbs Russet or Yukon Gold potatoes, thinly sliced
  • 2 whole garlic bulbs
  • 1 tbsp olive oil (for roasting garlic)
  • 1 ½ cups heavy cream
  • 1 cup whole milk
  • 3 tbsp unsalted butter
  • 3 tbsp all-purpose flour
  • 1 tsp salt
  • ½ tsp black pepper
  • 1 tsp fresh thyme or rosemary (optional)
  • 1 ½ cups shredded Gruyère cheese
  • ½ cup grated Parmesan cheese

Instructions

  1. Preheat oven to 375°F (190°C).
  2. Cut the tops off garlic bulbs, drizzle with olive oil, wrap in foil, and roast for 40 minutes until soft and fragrant.
  3. Peel and thinly slice potatoes using a mandoline or sharp knife.
  4. In a saucepan, melt butter over medium heat. Whisk in flour to form a roux and cook for 1–2 minutes.
  5. Slowly whisk in milk and cream. Cook, stirring frequently, until sauce thickens, about 5–7 minutes.
  6. Squeeze roasted garlic cloves into the sauce and mash to incorporate. Add salt, pepper, and herbs if using.
  7. Grease a 9×13-inch baking dish and layer half of the sliced potatoes evenly.
  8. Pour half of the roasted garlic cream sauce over potatoes. Sprinkle with half the Gruyère and Parmesan cheeses.
  9. Repeat with remaining potatoes, sauce, and cheeses.
  10. Cover with foil and bake for 30 minutes. Remove foil and bake an additional 20–25 minutes until golden and bubbly.
  11. Let rest for 10 minutes before serving to allow the sauce to set.

Notes

  • Make ahead by assembling a day in advance and baking when ready.
  • Use sharp cheddar instead of Gruyère for a bolder taste.
  • Add caramelized onions or cooked bacon for extra flavor.
  • Half-and-half can replace cream for a lighter version.
  • Let rest after baking to thicken the sauce properly.

Nutrition

Find it online: https://yumfamilyrecipes.com/roasted-garlic-potatoes-au-gratin-2/