A golden-brown crust, meltingly soft potatoes, and the aromatic scent of roasted garlic make each bite of this dish unforgettable. Roasted Garlic Potatoes Gratin is not just a side dish; it’s an experience that takes about 1 hour and 40 minutes to prepare and bake. The combination of creamy textures with layers of cheese creates an irresistible meal centerpiece.
This recipe is perfect for family gatherings, holiday feasts, or cozy dinners with friends. You can prepare it a day in advance and store it in the refrigerator before baking, making your mealtime stress-free.
Why You’ll Love This Recipe
- The roasted garlic adds a rich, deep flavor that elevates the dish.
- It features layers of creamy, cheesy goodness with fork-tender potatoes.
- The combination of thyme and nutmeg brings a warm, comforting aroma to your kitchen.
- It’s visually stunning with its golden, bubbly cheese topping.
What You’ll Need
Here’s what you’ll need to create this decadent gratin.
For the Potatoes
- 8-9 medium starchy potatoes, thinly sliced (about 1.2kg)
- Salt and pepper to taste
For the Garlic
- 1 head garlic, cut the top off
- Olive oil (for drizzling)
For the Cream Mixture
- 1 cup heavy cream / double cream (250 ml)
- 1/4 cup whole milk (60 ml)
- 1 tablespoon unsalted butter, plus more for greasing the baking dish
- 1 teaspoon fresh thyme leaves (or 1/3 teaspoon dried thyme)
- 1/4 teaspoon nutmeg
For the Cheese
- 1/2 cup grated parmesan cheese, divided (40g)
- 2 cups shredded Gruyère or mozzarella cheese (about 220g)
For Garnish
- Fresh chives, for garnish
Use a different cheese like cheddar for a unique flavor.
Substitutions & Swaps
- Whole milk can be replaced with skim milk.
- Gruyère cheese can be swapped for Swiss cheese.
- Fresh thyme can be substituted with dried Italian seasoning.
- Heavy cream can be replaced with coconut cream for a dairy-free version.
How to Make It
This recipe is simple yet rewarding.
1. Preheat
Preheat your oven to 375°F (190°C).
2. Roast the Garlic
Roast the garlic by cutting the top off the head to expose the cloves. Place it on aluminum foil, drizzle with olive oil, and season with a pinch of salt. Wrap it up and roast in the oven for about 30 minutes, until golden and soft. Allow it to cool slightly before handling.
3. Prepare the Dish
Grease a 9×13-inch (23×33 cm) baking dish and set it aside.
4. Slice the Potatoes
Peel and thinly slice the potatoes, using a mandoline slicer if possible for even cuts.
5. Layer the Potatoes
Arrange the potato slices upright in the baking dish, layering until all the potatoes are used.
6. Make the Cream Mixture
In a saucepan, combine heavy cream, milk, butter, half of the grated parmesan cheese, thyme, nutmeg, and a pinch of salt and pepper. Heat over medium heat until the butter melts and all ingredients blend. Do not allow it to boil.
7. Add Roasted Garlic
Once the garlic is roasted, squeeze the cloves out of their skins and mash into a paste. Stir the roasted garlic paste into the cream mixture until well combined.
8. Pour the Mixture
Pour the creamy mixture evenly over the potatoes in the baking dish, ensuring all slices are coated. Cover tightly with kitchen foil.
9. Bake Initially
Bake the potatoes au gratin in the preheated oven for 40 minutes.
10. Add Cheese
Remove the foil and sprinkle shredded Gruyère or mozzarella cheese along with the remaining grated parmesan on top.
11. Bake Again
Return the dish to the oven uncovered and bake for an additional 30 minutes, or until the cheese is bubbly and golden brown, and the potatoes are fork-tender.
12. Serve
Once finished, let the gratin cool for a few minutes before serving. Garnish with fresh chives.
How to Store It
Fridge: Store for up to 3 days in an airtight container.
Freezer: No, it does not freeze well.
Reheat: Microwave or bake at 350°F (175°C) for 20 minutes.
Tips for Best Results
- Ensure potatoes are sliced uniformly for even cooking.
- Let the gratin cool slightly before serving to enhance flavors.
- Experiment with different cheese blends for unique tastes.
- Always season each layer of potatoes for maximum flavor.
Serving Suggestions
- Serve alongside grilled meats for a complete meal.
- Pair with a fresh salad for a light option.
- Ideal for holiday gatherings or potluck dinners.
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