When comfort food calls, Cheesy Potatoes Au Gratin is the answer. This decadent, creamy dish features thinly sliced potatoes layered in a rich, velvety cheese sauce and topped with crispy bacon for a savory finish that’s impossible to resist. Whether you’re making it for a family dinner, holiday feast, or a cozy night in, it’s the kind of side dish that always steals the spotlight.

The creamy texture of the cheese sauce melts perfectly into every layer of potato, while the golden-brown crust delivers just the right amount of crisp. Each bite offers the perfect balance of rich cheddar, soft potatoes, and smoky bacon. It’s easy enough to prepare on a weeknight but indulgent enough to serve at special gatherings.

What Kind of Potatoes Should I Use?

For the best Cheesy Potatoes Au Gratin, go with starchy varieties like Russet or Yukon Gold. Russets yield the creamiest layers due to their high starch content, while Yukon Golds offer a naturally buttery flavor and hold their shape a bit more. Either choice gives you that luscious, melt-in-your-mouth texture that makes this dish shine.

Ingredients for the Cheesy Potatoes Au Gratin

For the base:

2 1/2 pounds Russet or Yukon Gold potatoes, peeled and thinly sliced (about 1/8 inch thick)
1 tablespoon unsalted butter (for greasing the dish)

For the cheese sauce:

3 tablespoons unsalted butter
3 tablespoons all-purpose flour
2 cups whole milk
1 cup heavy cream
2 teaspoons garlic powder
1/2 teaspoon onion powder
1 teaspoon salt (adjust to taste)
1/2 teaspoon ground black pepper
2 cups sharp cheddar cheese, shredded
1 cup Gruyère cheese or Monterey Jack, shredded

Toppings:

1/2 cup cooked and crumbled bacon
1/4 cup chopped fresh parsley (optional)
Extra shredded cheddar for topping (about 1/2 cup)

How To Make the Cheesy Potatoes Au Gratin

Step 1: Preheat and Prep

Preheat your oven to 375°F (190°C). Lightly butter a 9×13-inch baking dish and set aside. Peel and thinly slice the potatoes to about 1/8 inch thickness using a sharp knife or mandoline.

Step 2: Make the Cheese Sauce

In a medium saucepan, melt 3 tablespoons of butter over medium heat. Whisk in the flour and cook for 1 minute to form a roux. Gradually whisk in the milk and heavy cream, stirring constantly to avoid lumps.

Add the garlic powder, onion powder, salt, and pepper. Continue stirring until the mixture thickens slightly, about 3-5 minutes. Reduce heat to low and stir in shredded cheddar and Gruyère (or Monterey Jack) cheese. Stir until melted and smooth.

Step 3: Layer the Potatoes

Spread one-third of the sliced potatoes evenly in the greased baking dish. Pour a third of the cheese sauce over the potatoes. Repeat the layers two more times, finishing with a layer of cheese sauce on top.

Step 4: Add Toppings and Bake

Sprinkle extra shredded cheddar over the top layer. Cover the dish with foil and bake for 45 minutes. Remove the foil and bake for an additional 20-25 minutes, or until the top is golden and bubbly and the potatoes are fork-tender.

Step 5: Garnish and Serve

Let the dish cool for 10-15 minutes before serving. Top with crumbled bacon and freshly chopped parsley for a pop of color and flavor.

Optional: For an extra crisp top, broil for 2-3 minutes at the end—just keep a close eye to avoid burning.

How to Serve and Store Cheesy Potatoes Au Gratin

This rich and creamy side dish pairs beautifully with roasted meats like ham, chicken, or beef tenderloin. It’s a staple for holiday tables but equally welcome during casual weeknight dinners. Add a crisp green salad or a side of steamed broccoli for a complete meal.

To store leftovers, let the dish cool completely, then cover tightly with foil or transfer to an airtight container. Refrigerate for up to 4 days. To reheat, warm in a 350°F oven until heated through, or microwave individual portions. You can also freeze portions for up to 2 months—just be sure to use freezer-safe containers and thaw overnight before reheating.

Frequently Asked Questions

Can I make this dish ahead of time?

Yes! You can assemble the dish up to one day in advance. Just cover and refrigerate, then bake as directed when ready.

Can I use pre-shredded cheese?

You can, but freshly shredded cheese melts more smoothly and gives a creamier texture. Pre-shredded cheese often contains anti-caking agents that affect melting.

What if I don’t have Gruyère?

Monterey Jack, Fontina, or even mozzarella can be great substitutes. They melt well and still give you a deliciously creamy sauce.

How do I keep the potatoes from turning gray?

If prepping your potatoes early, submerge them in cold water until ready to layer. This prevents oxidation and browning.

Can I make this gluten-free?

Yes—just use a gluten-free all-purpose flour blend for the roux, and double-check that your cheeses and other ingredients are gluten-free.

Is it okay to skip the bacon?

Absolutely. The bacon adds a smoky crunch, but the dish is still rich and flavorful without it. Try topping with caramelized onions or crispy fried shallots instead!

Want More Side Dish Ideas?

If you’re hooked on these Cheesy Potatoes Au Gratin, here are a few more flavorful sides worth adding to your table:

Slow Cooker Garlic Butter Beef Bites & Potatoes for a hands-off hearty option.
Roasted Potatoes and Carrots for a rustic, oven-roasted combo.
Copycat Cracker Barrel Hashbrown Casserole to satisfy comfort food cravings.
Mexican Street Corn Potato Salad for a zesty, crowd-pleasing twist.
Easy Weeknight Tater Tot Casserole for cozy layers of flavor and crunch.

📌 Save this recipe to your Pinterest board so it’s just a click away when you need a cheesy side dish everyone will love.

And don’t forget to drop a comment! Did you try a different cheese blend? Maybe add green onions or jalapeños for a spicy kick?

I always enjoy hearing how you make these recipes your own. Got questions? Let’s swap ideas in the comments.

Looking for more comfort food inspiration? Follow along on my Pinterest page Life with Jam where I share daily recipes, seasonal favorites, and kitchen hacks!