Roasted Garlic Potatoes au Gratin is a delightful comfort food that combines creamy layers of potatoes with the rich flavor of roasted garlic. This dish is perfect for family gatherings, holiday dinners, or any occasion where you want to impress your guests. With its cheesy goodness and mouthwatering aroma, Roasted Garlic Potatoes au Gratin will quickly become a favorite on your dinner table.
Why You’ll Love This Recipe
- Delicious Flavor: The combination of roasted garlic and creamy cheeses creates an irresistible taste.
- Crowd-Pleaser: Perfect for gatherings; everyone loves cheesy, comforting potatoes!
- Easy Preparation: Simple steps make it accessible for cooks of all skill levels.
- Versatile Side Dish: Pairs well with various main courses, from beef to vegetarian options.
- Comfort Food Classic: Ideal for cozy nights in or festive celebrations.
Tools and Preparation
Before diving into the recipe, gather your tools to ensure a smooth cooking experience. Having everything ready will make the process even more enjoyable!
Essential Tools and Equipment
- Baking dish (9×13-inch)
- Aluminium foil
- Mandoline slicer
- Saucepan
- Mixing spoon
Importance of Each Tool
- Baking dish: Essential for layering the potatoes and ensuring even cooking.
- Mandoline slicer: Provides uniform potato slices for consistent texture and cooking.
- Saucepan: Needed to combine and heat the cream mixture evenly.

Ingredients
For the Potatoes
- 8-9 medium starchy potatoes (about 1.2kg), thinly sliced
- 1 head garlic, cut the top off
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 Topping
- 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
How to Make Roasted Garlic Potatoes au Gratin
Step 1: Preheat the Oven
Preheat your oven to 375°F (190°C).
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 the garlic head on a piece of aluminium foil, drizzle with olive oil, and season with salt.
3. Wrap the foil around the garlic and roast it in the preheated oven for about 30 minutes or until golden.
Step 3: Prepare Baking Dish
While the garlic is roasting:
– Grease a 9×13-inch baking dish with butter and set it aside.
Step 4: Slice Potatoes
Peel and thinly slice the potatoes using a mandoline slicer for even slices.
Step 5: Layer Potatoes
Take a stack of sliced potatoes and arrange them upright in layers within the baking dish. Continue layering until all potatoes are used.
Step 6: Make Cream Mixture
In a saucepan, combine:
– Heavy/double cream,
– Whole milk,
– Unsalted butter,
– Half of grated parmesan cheese,
– Thyme,
– Nutmeg,
– A pinch of salt and pepper.
Heat over medium heat until blended, but do not boil.
Step 7: Prepare Roasted Garlic Paste
Once garlic is roasted:
1. Squeeze out cloves from their skins.
2. Mash them into a paste.
3. Stir this paste into your cream mixture until fully combined.
Step 8: Combine Potatoes and Cream Mixture
Pour your creamy mixture over the layered potatoes in the baking dish, ensuring they are evenly coated. Cover tightly with kitchen foil.
Step 9: Bake Covered
Bake in preheated oven for 40 minutes.
Step 10: Add Cheese Topping
Remove foil:
– Top with shredded Gruyère or mozzarella cheese and remaining grated parmesan cheese.
Step 11: Bake Uncovered
Return to oven uncovered and bake for an additional 30 minutes or until cheese is bubbly and golden brown, and potatoes are fork-tender.
Step 12: Cool Before Serving
Remove from oven and let cool for a few minutes before serving.
Step 13: Garnish
Garnish with fresh chives before enjoying!
How to Serve Roasted Garlic Potatoes au Gratin
Roasted Garlic Potatoes au Gratin is a versatile dish that can enhance many meals. Here are some delightful serving suggestions that will elevate your dining experience.
Pair with a Protein
- Grilled Chicken: The juicy and smoky flavor of grilled chicken complements the creamy potatoes beautifully.
- Roasted Turkey: Serve alongside sliced roasted turkey for a comforting holiday-inspired meal.
- Beef Tenderloin: Rich and tender beef pairs well with the cheesy, garlicky goodness of the potatoes.
Add Seasonal Vegetables
- Steamed Broccoli: The crunch of fresh broccoli contrasts nicely with the smooth potatoes.
- Sautéed Spinach: A light, garlicky sautéed spinach adds color and nutrition to your plate.
- Roasted Carrots: Sweet, caramelized carrots create a delicious balance with the savory gratin.
Create a Salad Plate
- Mixed Green Salad: Toss together fresh greens with a light vinaigrette to add brightness to your meal.
- Caesar Salad: The classic flavors of Caesar salad provide a delightful crunch and tanginess next to the rich potatoes.
How to Perfect Roasted Garlic Potatoes au Gratin
To ensure your Roasted Garlic Potatoes au Gratin turns out perfectly every time, consider these helpful tips.
- Use Starchy Potatoes: Select high-starch varieties like Russets or Yukon Golds for creamy texture.
- Slice Evenly: Ensure uniform thickness in potato slices for even cooking; a mandoline works great for this.
- Don’t Rush the Garlic: Roast garlic until soft and caramelized for maximum flavor—this step is key!
- Layer Carefully: Layer potatoes tightly for better flavor distribution and even cooking throughout the dish.
- Check for Doneness: Use a fork to test if potatoes are tender before adding cheese; they should be easily pierced.
- Let it Rest: Allow the gratin to cool slightly before serving; this helps it set up perfectly for slicing.
Best Side Dishes for Roasted Garlic Potatoes au Gratin
When serving Roasted Garlic Potatoes au Gratin, complement it with various sides that enhance your meal’s overall flavor. Here are some excellent options:
- Grilled Asparagus: Lightly charred asparagus adds a fresh crunch that balances creamy potatoes.
- Honey Glazed Brussels Sprouts: Sweet glazed sprouts contrast beautifully with savory flavors in the gratin.
- Creamy Coleslaw: A tangy coleslaw provides a refreshing crunch that pairs well with rich dishes.
- Herbed Quinoa Salad: Nutty quinoa mixed with herbs offers a nutritious side full of texture and flavor.
- Garlic Breadsticks: Soft, buttery breadsticks are perfect for soaking up any leftover cream sauce on your plate.
- Corn on the Cob: Sweet corn enhances any meal, adding seasonal flair alongside your cheesy potatoes.
Common Mistakes to Avoid
When preparing Roasted Garlic Potatoes au Gratin, it’s essential to avoid common pitfalls that can affect the dish’s texture and flavor. Here are some mistakes to steer clear of:
- Overcooking the garlic: Roasting garlic too long can lead to bitterness. Watch it closely and remove it once soft and golden.
- Skipping the seasoning: Neglecting to add salt and pepper can result in bland potatoes. Season each layer for a more flavorful dish.
- Using uneven potato slices: Thick or uneven slices will cook at different rates, leading to inconsistencies. Use a mandoline for uniform thickness.
- Not letting the dish rest: Cutting into the gratin immediately can cause it to fall apart. Allow it to cool for a few minutes before serving.
- Ignoring the cheese topping: Skimping on cheese may lead to a less appealing crust. Generously layer your favorite cheeses for that delicious golden finish.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container in the refrigerator for up to 3 days.
- Let it cool completely before transferring it to avoid condensation.
Freezing Roasted Garlic Potatoes au Gratin
- Freeze in an airtight container for up to 2 months.
- Layer parchment paper between portions if freezing individual servings.
Reheating Roasted Garlic Potatoes au Gratin
- Oven: Preheat to 350°F (175°C) and cover with foil. Heat for about 20-25 minutes until warmed through.
- Microwave: Use a microwave-safe dish, cover loosely, and heat on medium power for 2-3 minutes, stirring halfway.
- Stovetop: Place in a skillet over low heat with a splash of cream or broth, stirring occasionally until heated through.
Frequently Asked Questions
If you have questions about Roasted Garlic Potatoes au Gratin, you’re not alone! Here are some common inquiries:
Can I use other types of cheese in Roasted Garlic Potatoes au Gratin?
Absolutely! Feel free to substitute Gruyère or mozzarella with cheeses like cheddar or fontina for different flavors.
How do I make my Roasted Garlic Potatoes au Gratin healthier?
You can reduce calories by using lower-fat cream and milk options or adding more vegetables like spinach or kale.
What is the best way to slice potatoes for this recipe?
Using a mandoline slicer ensures even slices, which helps achieve consistent cooking throughout the dish.
Can I prepare Roasted Garlic Potatoes au Gratin ahead of time?
Yes! Assemble the dish in advance but bake it just before serving for the best results.
Final Thoughts
Roasted Garlic Potatoes au Gratin is not only comforting but also versatile enough for any meal. With an inviting blend of flavors and creamy textures, it’s perfect as a side dish or main attraction. Feel free to customize it by adding your favorite herbs or vegetables!
Roasted Garlic Potatoes au Gratin
Roasted Garlic Potatoes au Gratin is a mouthwatering dish that brings together creamy layers of tender potatoes infused with the rich flavor of roasted garlic. Ideal for family gatherings, holiday feasts, or any occasion where you want to impress your guests, this cheesy comfort food will undoubtedly become a staple at your dinner table. With its inviting aroma and luscious texture, it promises to satisfy even the pickiest eaters. Dive into this easy-to-follow recipe and delight in a dish that combines simplicity with gourmet flair.
- Prep Time: 20 minutes
- Cook Time: 70 minutes
- Total Time: 1 hour 30 minutes
- Yield: Serves approximately 6 people 1x
- Category: Side Dish
- Method: Baking
- Cuisine: American
Ingredients
- 8–9 medium starchy potatoes (about 1.2kg), thinly sliced
- 1 head garlic
- 1 cup heavy cream
- 1/4 cup whole milk
- 1 tablespoon unsalted butter
- 1 teaspoon fresh thyme leaves
- 1/4 teaspoon 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 your oven to 375°F (190°C).
- Roast the garlic by cutting off the top of the head, drizzling with olive oil, seasoning with salt, wrapping in foil, and baking for about 30 minutes until golden.
- Grease a 9×13-inch baking dish with butter.
- Thinly slice the potatoes using a mandoline slicer.
- Layer the potato slices upright in the baking dish until all are used up.
- In a saucepan, combine cream, milk, butter, half of the grated parmesan cheese, thyme, nutmeg, salt, and pepper over medium heat until blended.
- Squeeze out garlic cloves from their skins after roasting and mash them into a paste; stir into the cream mixture.
- Pour the cream mixture evenly over the layered potatoes and cover tightly with foil.
- Bake covered for 40 minutes; then remove foil and add remaining cheeses on top.
- Bake uncovered for an additional 30 minutes until bubbly and golden brown.
- Allow to cool slightly before serving; garnish with fresh chives.
Nutrition
- Serving Size: 1 serving
- Calories: 360
- Sugar: 3g
- Sodium: 320mg
- Fat: 22g
- Saturated Fat: 12g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 34g
- Fiber: 3g
- Protein: 10g
- Cholesterol: 65mg




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