Roasted Garlic Potatoes au Gratin is a delightful dish that brings comfort to any table. This recipe features layers of tender, thinly sliced potatoes enveloped in a rich, creamy sauce infused with the aromatic flavor of roasted garlic. It’s perfect for family dinners, holiday gatherings, or a cozy night in. The combination of melty cheese and savory spices makes it a true favorite among comfort foods.

Jump to:
- Why You’ll Love This Recipe
- Tools and Preparation
- Essential Tools and Equipment
- Importance of Each Tool
- Ingredients
- For the Potatoes
- For the Creamy Mixture
- For the Cheese Topping
- Garnish
- How to Make Roasted Garlic Potatoes au Gratin
- Step 1: Preheat the Oven
- Step 2: Roast the Garlic
- Step 3: Prepare Your Baking Dish
- Step 4: Slice Your Potatoes
- Step 5: Layer Your Potatoes
- Step 6: Make the Creamy Mixture
- Step 7: Incorporate Roasted Garlic
- Step 8: Combine Everything
- Step 9: Bake Covered
- Step 10: Add Cheese Topping
- Step 11: Let It Rest
- Step 12: Garnish
- How to Serve Roasted Garlic Potatoes au Gratin
- As a Main Dish Companion
- With Fresh Salads
- Ideal for Special Occasions
- How to Perfect Roasted Garlic Potatoes au Gratin
- Best Side Dishes for Roasted Garlic Potatoes au Gratin
- Common Mistakes to Avoid
- Storage & Reheating Instructions
- Refrigerator Storage
- Freezing Roasted Garlic Potatoes au Gratin
- Reheating Roasted Garlic Potatoes au Gratin
- Frequently Asked Questions
- Can I use other types of cheese?
- How do I make this recipe healthier?
- Can I add vegetables?
- What should I serve with Roasted Garlic Potatoes au Gratin?
- Final Thoughts
- 📖 Recipe Card
Why You’ll Love This Recipe
- Flavorful Layers: Each bite is packed with the deep flavor of roasted garlic and creamy cheese.
- Easy to Prepare: With simple steps and minimal hands-on time, this dish is accessible for both novice and experienced cooks.
- Versatile Dish: Great as a side for any main course or as a hearty vegetarian option on its own.
- Crowd-Pleaser: Ideal for gatherings, this dish is sure to impress friends and family alike.
- Comforting Appeal: The warm, cheesy goodness makes it perfect for fall and winter meals.
Tools and Preparation
Before starting your culinary adventure, gather the essential tools you will need to make Roasted Garlic Potatoes au Gratin successfully.
Essential Tools and Equipment
- Baking dish (9×13-inch)
- Mandoline slicer (optional)
- Aluminum foil
- Saucepan
- Mixing bowl
Importance of Each Tool
- Baking dish: A sturdy baking dish ensures even cooking and easy serving.
- Mandoline slicer: This tool helps achieve perfectly thin potato slices for an even texture throughout.
- Aluminum foil: Covering your dish while baking retains moisture and ensures the potatoes cook evenly.

Ingredients
For the Potatoes
- 8-9 medium starchy potatoes (about 1.2kg), thinly sliced
- 1 head garlic, cut the top off
- Salt and pepper to taste
For the Creamy 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
For the Cheese Topping
- 1/2 cup (40g) grated parmesan cheese, divided
- 2 cups (about 220g) shredded Gruyère or mozzarella cheese
Garnish
- Fresh chives, for garnish
How to Make Roasted Garlic Potatoes au Gratin
Step 1: Preheat the Oven
Preheat your oven to 375°F (190°C). This ensures that your dish starts cooking immediately at the right temperature.
Step 2: Roast the Garlic
Begin by roasting the garlic:
1. Cut the top off the head of garlic to expose the cloves.
2. Place it on a piece of aluminum foil.
3. Drizzle with olive oil and season with a pinch of salt.
4. Wrap it tightly in foil and roast in the oven for about 30 minutes until soft and golden.
Step 3: Prepare Your Baking Dish
While the garlic roasts:
1. Grease a 9×13-inch baking dish with additional butter and set aside.
Step 4: Slice Your Potatoes
Peel and thinly slice your potatoes using a mandoline slicer if available. This helps achieve uniform thickness for even cooking.
Step 5: Layer Your Potatoes
Take stacks of sliced potatoes and arrange them upright in layers within your greased baking dish. Continue layering until all potatoes are used up.
Step 6: Make the Creamy Mixture
In a saucepan:
1. Combine heavy cream, milk, butter, half of the grated parmesan cheese, thyme, nutmeg, salt, and pepper.
2. Heat over medium heat until well mixed; do not let it boil.
Step 7: Incorporate Roasted Garlic
Once roasted, squeeze out the soft garlic cloves from their skins into a mixing bowl. Mash into a paste and stir this into your creamy mixture until fully combined.
Step 8: Combine Everything
Pour your creamy mixture evenly over the layered potatoes in your baking dish. Cover tightly with kitchen foil before placing it in the oven.
Step 9: Bake Covered
Bake in your preheated oven for about 40 minutes covered with foil.
Step 10: Add Cheese Topping
Remove the foil:
1. Top with shredded Gruyère or mozzarella cheese along with remaining grated parmesan cheese.
2. Return to oven uncovered for an additional 30 minutes until bubbly and golden brown.
Step 11: Let It Rest
Once baked, remove from oven and allow to cool slightly before serving.
Step 12: Garnish
Finish by garnishing with fresh chives before serving warm!
Now you can enjoy this delicious Roasted Garlic Potatoes au Gratin! Perfect as a side or main dish any time you’re craving comfort food!
How to Serve Roasted Garlic Potatoes au Gratin
Roasted Garlic Potatoes au Gratin is a versatile dish that pairs beautifully with various meals. Here are some serving suggestions to elevate your dining experience.
As a Main Dish Companion
- Grilled Chicken: The creamy texture of the potatoes complements the smoky flavor of grilled chicken perfectly.
- Beef Roast: Pair it with a savory beef roast for a hearty, comforting meal.
With Fresh Salads
- Mixed Green Salad: A light salad with vinaigrette provides a refreshing contrast to the rich potatoes.
- Caesar Salad: The crunch of romaine and the tangy dressing balance well with the creamy gratin.
Ideal for Special Occasions
- Holiday Dinners: Serve alongside your holiday turkey or lamb for a festive touch.
- Dinner Parties: Impress your guests by serving these potatoes as a side with your gourmet main course.
How to Perfect Roasted Garlic Potatoes au Gratin
Achieving the perfect Roasted Garlic Potatoes au Gratin involves attention to detail. Here are some tips to ensure your dish comes out flawlessly.
- Bold Flavoring: Enhance flavors by adding herbs like rosemary or parsley for an aromatic touch.
- Even Slicing: Use a mandoline slicer for uniform potato slices, ensuring even cooking throughout.
- Cheese Choices: Experiment with different cheeses such as cheddar or gouda for varied flavors and textures.
- Layering Techniques: Alternate layers of cheese and potatoes to create richer flavor profiles in each bite.
- Rest Before Serving: Allow the dish to rest for a few minutes after baking. This helps set the layers and makes serving easier.
Best Side Dishes for Roasted Garlic Potatoes au Gratin
Pairing sides with Roasted Garlic Potatoes au Gratin can enhance your meal’s overall flavor profile. Here are some great options:
- Grilled Asparagus: Lightly seasoned asparagus adds a crunchy, fresh element to your plate.
- Honey Glazed Carrots: Sweet carrots provide a delightful contrast to the savory potatoes.
- Stuffed Bell Peppers: These colorful, flavorful peppers can add variety and nutrition to your meal.
- Steamed Broccoli: The bright color and slight bitterness of broccoli balance well with the richness of the gratin.
- Roasted Brussels Sprouts: Their earthy flavor and crispy texture make them an excellent companion for creamy dishes.
- Zucchini Noodles: A low-carb option that adds freshness without overpowering other flavors on the plate.
Common Mistakes to Avoid
When making Roasted Garlic Potatoes au Gratin, it’s easy to make some common mistakes that can affect the final dish. Here are a few to watch out for:
- Skipping the garlic roasting step: Roasting the garlic is crucial for flavor. Without it, your dish will lack that rich, savory taste. Always roast your garlic before adding it to the cream.
- Using the wrong type of potatoes: Not all potatoes are suitable for au gratin dishes. Starchy potatoes like Russets or Yukon Golds work best. Avoid waxy potatoes as they won’t achieve the desired creamy texture.
- Overbaking or underbaking: Achieving the perfect bake is key. If baked too long, the potatoes can become mushy; too short, and they might not be tender. Follow the baking times closely.
- Neglecting seasoning: A common mistake is forgetting to season adequately. Taste your cream mixture before pouring over the potatoes to ensure it’s seasoned well with salt and pepper.
- Not layering correctly: Proper layering helps with even cooking and flavor distribution. Make sure to spread out your potato slices evenly in the baking dish without overcrowding them.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftover Roasted Garlic Potatoes au Gratin in an airtight container.
- They can be kept in the refrigerator for up to 3 days.
Freezing Roasted Garlic Potatoes au Gratin
- If you want to freeze leftovers, use a freezer-safe container.
- They can last in the freezer for up to 2 months, but expect some texture change upon reheating.
Reheating Roasted Garlic Potatoes au Gratin
- Oven: Preheat your oven to 350°F (175°C). Cover with foil and heat for about 20-30 minutes until warmed through.
- Microwave: Place a portion in a microwave-safe dish and cover with a lid. Heat on medium power for about 3-5 minutes or until hot.
- Stovetop: Heat a skillet over medium heat and add a little cream or broth. Add portions of potatoes and stir occasionally until heated through.
Frequently Asked Questions
Here are some frequently asked questions regarding Roasted Garlic Potatoes au Gratin:
Can I use other types of cheese?
Yes! While Gruyère is traditional, feel free to experiment with cheeses like cheddar or fontina for different flavors.
How do I make this recipe healthier?
You can substitute heavy cream with half-and-half or use reduced-fat cheese options to lighten the dish while still keeping it delicious.
Can I add vegetables?
Absolutely! Vegetables like spinach or mushrooms can be layered in between potato slices for added nutrition and flavor.
What should I serve with Roasted Garlic Potatoes au Gratin?
This dish pairs well with grilled chicken, beef, or turkey dishes, making it an excellent side for many main courses.
Final Thoughts
Roasted Garlic Potatoes au Gratin is a delightful combination of creamy textures and robust flavors that makes it an unforgettable side dish. Its versatility allows you to customize it by adding different cheeses or vegetables according to your taste preferences. Give this recipe a try at your next gathering; it’s sure to impress!
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Roasted Garlic Potatoes au Gratin
- Total Time: 1 hour 30 minutes
- Yield: Serves approximately 8 people 1x
Description
Indulge in the comforting warmth of Roasted Garlic Potatoes au Gratin, a creamy and savory dish that elevates any meal. This delightful recipe layers tender, thinly sliced starchy potatoes with a velvety garlic-infused cream sauce, topped with melting cheese for a deliciously rich experience. Perfect for family dinners or special occasions, this gratin is not only a crowd-pleaser but also an easy-to-make recipe that even novice cooks can master. With its warm, cheesy goodness, it’s ideal for cozy fall and winter nights.
Ingredients
- 8–9 medium starchy potatoes (about 1.2kg), thinly sliced
- 1 head garlic
- 1 cup (250 ml) heavy cream
- 1/4 cup (60 ml) whole milk
- 1 tablespoon unsalted butter
- 1 tsp fresh thyme leaves
- 1/4 tsp nutmeg
- 1/2 cup (40g) grated parmesan cheese, divided
- 2 cups (about 220g) shredded Gruyère or mozzarella cheese
- Salt and pepper to taste
- Fresh chives for garnish
Instructions
- Preheat your oven to 375°F (190°C).
- Cut off the top of the garlic head, drizzle with olive oil, season with salt, wrap in foil, and roast for about 30 minutes until golden.
- Grease a 9×13-inch baking dish with butter.
- Thinly slice the potatoes using a mandoline slicer for uniform thickness.
- Layer the potato slices upright in the baking dish until all are used.
- In a saucepan, combine heavy cream, milk, butter, half of the parmesan cheese, thyme, nutmeg, salt, and pepper; heat until mixed well without boiling.
- Squeeze roasted garlic into a bowl and mash it into a paste; mix it into the cream mixture.
- Pour the creamy mixture over the layered potatoes and cover tightly with foil.
- Bake covered for about 40 minutes.
- Remove foil and top with remaining cheeses; bake uncovered for an additional 30 minutes until bubbly and golden brown.
- Let cool slightly before garnishing with fresh chives and serving warm.
- Prep Time: 20 minutes
- Cook Time: 70 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: Comfort Food
Nutrition
- Serving Size: 1/8 of dish (approximately 200g)
- Calories: 450
- Sugar: 2g
- Sodium: 650mg
- Fat: 28g
- Saturated Fat: 15g
- Unsaturated Fat: 10g
- Trans Fat: 0g
- Carbohydrates: 37g
- Fiber: 4g
- Protein: 10g
- Cholesterol: 60mg







