Roasted Garlic Potatoes au Gratin
If you’re looking for a dish that wraps you in warmth and comfort, you’ve got to try Roasted Garlic Potatoes au Gratin. This recipe has been a staple in my kitchen for years. It’s the kind of dish that brings the family together around the table, whether it’s a chilly autumn evening or a festive family gathering. Each bite is a delightful combination of creamy, cheesy layers with the rich flavor of roasted garlic—honestly, what’s not to love?
This recipe is straightforward, making it perfect for busy weeknights or special occasions. You can easily prepare it ahead of time and pop it in the oven when you’re ready to wow your guests. Trust me, this will become a favorite in your home too!
Why You’ll Love This Recipe
- Comforting flavors: The combination of roasted garlic and creamy cheese creates a cozy dish that feels like a warm hug.
- Easy to make: With simple steps and common ingredients, you’ll find this recipe easy to whip up.
- Perfect for sharing: This dish serves 8, making it great for family dinners or potlucks.
- Flexible ingredients: You can customize it with different cheeses or herbs based on what you have on hand.
- Make-ahead friendly: Prepare it in advance and bake when you’re ready—perfect for stress-free entertaining!

Ingredients You’ll Need
To make these delicious Roasted Garlic Potatoes au Gratin, you’ll need some simple and wholesome ingredients. Here’s what you’ll gather:
For the Potatoes
- 8-9 medium starchy potatoes (about 1.2kg), thinly sliced
- 1 head garlic, cut the top off
For the Cream Mixture
- 1 cup (250 ml) heavy cream / double cream
- 1/4 cup (60 ml) whole milk
- 1 tablespoon unsalted butter, plus more for greasing the baking dish
- 1 tsp fresh thyme leaves (or 1/3 tsp dried thyme)
- 1/4 tsp nutmeg
- 1/2 cup (40g) grated parmesan cheese, divided
For Topping
- 2 cups (about 220g) shredded Gruyère or mozzarella cheese
- Salt and pepper to taste
- Fresh chives, for garnish
Variations
This Roasted Garlic Potatoes au Gratin recipe is quite flexible! Here are some ideas to make it your own:
- Add extra veggies: Layer in some spinach or sautéed mushrooms between the potato layers for added nutrition and flavor.
- Switch up the cheese: Try using cheddar or feta cheese instead of Gruyère or mozzarella for a different taste.
- Herb infusion: Experiment with other herbs like rosemary or oregano for a unique twist on flavor.
- Spice it up: Add a pinch of cayenne pepper or smoked paprika to give it an extra kick!
How to Make Roasted Garlic Potatoes au Gratin
Step 1: Roast the Garlic
Begin by preheating your oven to 375°F (190°C). To roast the garlic, cut off the top of the head to expose the cloves. Wrap it in aluminum foil after drizzling with olive oil and seasoning lightly with salt. Roasting takes about 30 minutes; this process transforms garlic into sweet, caramelized goodness that enhances our dish.
Step 2: Prepare Your Baking Dish
While the garlic roasts, grease a 9×13-inch (23×33 cm) baking dish with butter. Greasing prevents sticking and ensures easy serving later on.
Step 3: Slice the Potatoes
Peel and thinly slice your potatoes. Using a mandoline slicer is recommended here; it helps ensure even slices which cook uniformly—this step is crucial for creating those lovely layers.
Step 4: Layer the Potatoes
Arrange stacks of potato slices upright in your greased baking dish. This method not only looks beautiful but also allows every slice to absorb that creamy goodness.
Step 5: Make the Cream Mixture
In a saucepan over medium heat, combine heavy cream, milk, butter, half of your grated parmesan cheese, thyme, nutmeg, along with salt and pepper. Heat until everything melds together nicely without boiling; this mixture is going to be dreamy!
Step 6: Add Roasted Garlic
Once roasted and cooled slightly, squeeze out those soft garlic cloves into a bowl and mash them into a paste. Stir this flavorful paste into your cream mixture until fully combined—this adds depth to our potatoes.
Step 7: Assemble
Pour that luscious creamy mixture over your layered potatoes evenly—you want every piece coated! Cover tightly with kitchen foil; this helps steam them perfectly during baking.
Step 8: Bake First Round
Place in your preheated oven for about 40 minutes. Keeping covered allows potatoes to become tender while absorbing all that garlicky goodness.
Step 9: Add Cheese Topping
After 40 minutes, remove the foil and sprinkle shredded Gruyère or mozzarella over the top along with remaining parmesan cheese. This step adds that irresistible golden crust we all love!
Step 10: Bake Again
Return uncovered to bake for an additional 30 minutes until bubbly and golden brown—this is when they truly shine!
Step 11: Cool & Garnish
Once baked perfectly tender and golden brown on top, let them cool slightly before serving. Garnish with fresh chives just before enjoying; they add a lovely pop of color!
Now gather around your table and dig into these heavenly Roasted Garlic Potatoes au Gratin! Enjoy!
Pro Tips for Making Roasted Garlic Potatoes au Gratin
Creating the perfect Roasted Garlic Potatoes au Gratin is all about technique and a little love in the kitchen! Here are some tips to ensure your dish turns out fabulously every time.
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Use starchy potatoes: Opt for varieties like Russet or Yukon Gold, as they create a creamy texture that holds together beautifully while cooking.
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Don’t rush the garlic roasting: Take your time when roasting the garlic. The longer it cooks, the sweeter and more flavorful it becomes, enriching your dish with a delicious depth.
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Layer evenly: When stacking your potato slices, ensure they are layered evenly for consistent cooking. This helps achieve that perfect fork-tender bite without any crunchy pieces.
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Cover tightly with foil: When baking initially, covering your dish with foil traps steam and encourages even cooking. This ensures all potatoes soften nicely before you add that glorious cheese topping.
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Let it rest before serving: Allowing the gratin to rest for a few minutes after baking helps it set and makes it easier to slice. Plus, it gives you a moment to savor the delicious aroma!
How to Serve Roasted Garlic Potatoes au Gratin
Presenting Roasted Garlic Potatoes au Gratin can transform a simple meal into something special. Whether it’s a family gathering or an intimate dinner, this dish shines bright on the table!
Garnishes
- Fresh chives: Chopped fresh chives add a pop of color and a mild onion flavor that complements the creamy garlic goodness.
- Parmesan shavings: A sprinkle of fresh parmesan shavings right before serving elevates both taste and presentation.
- A drizzle of olive oil: A light drizzle of high-quality extra virgin olive oil adds richness and enhances the overall flavor.
Side Dishes
- Simple Green Salad: A refreshing salad with mixed greens, cherry tomatoes, and a light vinaigrette balances the richness of the gratin.
- Roasted Vegetables: Seasonal roasted vegetables like carrots, Brussels sprouts, or asparagus provide a colorful contrast and are easy to prepare alongside your gratin.
- Grilled Chicken or Tofu: For some protein, consider serving grilled chicken or marinated tofu. Both options complement the creamy texture of the potatoes beautifully.
- Steamed Broccoli or Green Beans: Crisp-tender steamed veggies add brightness to your meal while keeping it healthy and vibrant.
With these tips and serving ideas, your Roasted Garlic Potatoes au Gratin will be not just a dish but an experience everyone will enjoy! Happy cooking!

Make Ahead and Storage
This Roasted Garlic Potatoes au Gratin recipe is perfect for meal prep! You can prepare it in advance and enjoy the creamy, cheesy goodness throughout the week.
Storing Leftovers
- Allow the dish to cool completely before storing.
- Transfer leftovers to an airtight container.
- Store in the refrigerator for up to 3-4 days.
Freezing
- Let the potatoes au gratin cool completely.
- Wrap the dish tightly with plastic wrap and then with aluminum foil to prevent freezer burn.
- Freeze for up to 2 months.
Reheating
- Thaw overnight in the refrigerator if frozen.
- Preheat the oven to 350°F (175°C).
- Cover with foil and reheat for about 20-25 minutes until warmed through, removing the foil for the last 5 minutes to crisp up the cheese.
FAQs
Got questions? Here are some answers to common queries you might have about Roasted Garlic Potatoes au Gratin!
Can I make Roasted Garlic Potatoes au Gratin ahead of time?
Absolutely! You can assemble the dish a day in advance, cover it, and store it in the refrigerator. Just pop it in the oven when you’re ready to bake!
What can I use instead of heavy cream in Roasted Garlic Potatoes au Gratin?
You can substitute heavy cream with a combination of whole milk and a splash of plant-based cream or even use a thicker coconut milk for a dairy-free option while still achieving a creamy texture.
How long do leftovers of Roasted Garlic Potatoes au Gratin last?
Leftovers can be stored in an airtight container in the refrigerator for about 3-4 days, making them a great choice for meal prep!
Can I add vegetables to Roasted Garlic Potatoes au Gratin?
Certainly! Feel free to layer in some sautéed spinach, broccoli, or mushrooms between the potato layers for added flavor and nutrition.
Final Thoughts
I truly hope you give this Roasted Garlic Potatoes au Gratin recipe a try! It’s not just a dish; it’s a warm hug on a plate that brings comfort and joy. Whether it’s for family dinners or special gatherings, it’s bound to impress. Enjoy making this delightful recipe and feel free to share your experiences! Happy cooking!
Roasted Garlic Potatoes au Gratin
Indulge in the comforting warmth of Roasted Garlic Potatoes au Gratin, a dish that transforms simple ingredients into a creamy, cheesy delight. This recipe harmonizes tender potatoes with sweet roasted garlic, creating layers of flavor that are sure to impress family and friends alike. Perfect for any occasion, whether you’re hosting a festive gathering or enjoying a cozy family dinner, this gratin is not only easy to prepare but also make-ahead friendly. Simply assemble it in advance and let your oven do the magic when it’s time to serve! With customizable options for cheeses and herbs, you can make this dish your own while savoring every bite of this hearty potato casserole.
- Prep Time: 20 minutes
- Cook Time: 70 minutes
- Total Time: 1 hour 30 minutes
- Yield: Serves 8
- Category: Side Dish
- Method: Baking
- Cuisine: Comfort Food
Ingredients
- 8–9 medium starchy potatoes, thinly sliced
- 1 head garlic, cut the top off
- 1 cup heavy cream
- 1/4 cup whole milk
- 1 tablespoon unsalted butter, plus more for greasing the baking dish
- 1 tsp fresh thyme leaves
- 1/4 tsp nutmeg
- 1/2 cup grated parmesan cheese, divided
- 2 cups shredded Gruyère or mozzarella cheese
- Salt and pepper to taste
- Fresh chives, for garnish
Instructions
- Preheat oven to 375°F (190°C). Roast garlic wrapped in foil for about 30 minutes until soft.
- Grease a 9×13-inch baking dish with butter.
- Thinly slice potatoes using a mandoline slicer and layer them upright in the dish.
- In a saucepan over medium heat, combine heavy cream, milk, butter, thyme, nutmeg, salt, and pepper; warm until combined.
- Squeeze roasted garlic cloves into a paste and mix into the cream mixture.
- Pour the cream mixture over the layered potatoes. Cover tightly with foil and bake for 40 minutes.
- Remove foil, sprinkle with Gruyère or mozzarella and remaining parmesan; bake uncovered for an additional 30 minutes until golden brown.
- Let cool slightly before serving and garnish with fresh chives.
Nutrition
- Serving Size: 1 cup (200g)
- Calories: 320
- Sugar: 3g
- Sodium: 450mg
- Fat: 20g
- Saturated Fat: 12g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 28g
- Fiber: 3g
- Protein: 8g
- Cholesterol: 50mg
