Why You’ll Love This Recipe
Potatoes Au Gratin is a rich and creamy comfort dish made with thinly sliced potatoes layered in a luscious cheese sauce and baked to golden perfection. With its crispy top and tender, cheesy center, it’s an irresistible side that pairs wonderfully with roast meats or can stand alone as a hearty vegetarian main.

ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
russet potatoesheavy creamwhole milkgarlicunsalted buttercheddar cheesegruyère cheesesaltblack peppernutmeg (optional)

directions

Preheat your oven to 375°F (190°C) and butter a 9×13-inch baking dish.

Peel and thinly slice the potatoes using a mandoline or sharp knife to ensure even cooking.

In a saucepan over medium heat, melt the butter and sauté the minced garlic until fragrant.

Stir in the cream and milk, then season with salt, pepper, and a pinch of nutmeg if using. Bring to a gentle simmer.

Remove from heat and stir in half of the grated cheeses until melted and smooth.

Layer one-third of the potatoes in the baking dish, pour a portion of the sauce over, and sprinkle some of the remaining cheese. Repeat until all potatoes and sauce are used, finishing with a generous cheese topping.

Cover with foil and bake for 45 minutes. Remove foil and continue baking for 20-25 minutes or until the top is golden and bubbly.

Let rest for 10 minutes before serving to allow the sauce to set.

Servings and timing

This recipe yields approximately 8 servings.
Preparation time: 20 minutes
Baking time: 65-70 minutes
Resting time: 10 minutes
Total time: 1 hour 40 minutes

Variations

Add cooked bacon or ham between the layers for a meaty twist.
Substitute the cheeses with mozzarella, parmesan, or blue cheese for different flavor profiles.
Add thinly sliced onions or leeks for extra depth.
Include fresh thyme or rosemary in the sauce for a fragrant herbal note.

storage/reheating

Store leftovers in an airtight container in the refrigerator for up to 4 days.
To reheat, bake covered at 350°F (175°C) for 20-25 minutes or microwave in short bursts until heated through.
For longer storage, freeze tightly wrapped portions for up to 2 months. Thaw overnight before reheating.

FAQs

Can I make Potatoes Au Gratin ahead of time?
Yes, assemble the dish, cover, and refrigerate up to a day ahead. Bake when ready to serve.

Do I have to use both cheddar and gruyère?
No, but the combination offers a perfect balance of creaminess and sharpness. Feel free to adjust based on your taste or availability.

Can I use a different kind of potato?
Yukon Golds work well too, but russets provide the creamiest texture.

Why did my sauce curdle?
Be sure to simmer gently and avoid high heat. Preheating the milk and cream also helps.

Is this the same as scalloped potatoes?
They’re similar, but scalloped potatoes typically don’t include cheese in the sauce.

Can I make this dish gluten-free?
Yes, as this version contains no flour, it’s naturally gluten-free.

Can I add breadcrumbs on top?
Absolutely, a sprinkle of buttered breadcrumbs can add a nice crunch.

How do I keep the top from burning?
Cover with foil during the first part of baking and uncover only to brown the top.

Can I make this vegan?
Yes, use plant-based milk, vegan butter, and dairy-free cheese alternatives.

What should I serve with Potatoes Au Gratin?
Great alongside roasted meats, grilled vegetables, or a crisp green salad.

Conclusion

Potatoes Au Gratin is a classic dish that brings warmth and indulgence to any table. Creamy, cheesy, and beautifully baked, it’s the kind of side that always steals the show. Try it once, and it just might become a staple in your comfort food rotation.