Cheesy Scalloped Potatoes Recipe with Creamy Cheddar Sauce

This cheesy scalloped potatoes recipe combines thinly sliced russet or Yukon Gold potatoes, tender onion, and a creamy flour-thickened milk sauce with sharp cheddar and Parmesan. Bake the covered casserole for 45–50 minutes, then uncover it for 20–25 minutes so the top turns browned and bubbling.

With about 20–25 minutes of preparation and a total time of approximately 1 hour 35 minutes, this comforting potato casserole serves 6–8 people. Each bite is rich, creamy, savory, and full of buttery potato flavor, making it a wonderful side dish for Sunday dinner, holiday meals, roast chicken, steak, or baked ham.

Why You’ll Love This Recipe

These cheesy scalloped potatoes are the kind of side dish that makes a meal feel special without requiring complicated cooking techniques. The potatoes become tender and silky while the onion softens into the sauce, creating layers of savory flavor from the bottom of the baking dish to the golden cheese crust.

A small amount of flour gives the milk and cream mixture enough body to coat every potato slice. Sharp cheddar brings familiar, full-bodied cheese flavor, while Parmesan adds a salty finish and helps the surface brown beautifully.

The recipe is also practical for gatherings. You can assemble the layers in one baking dish, cover it for most of the cooking time, and uncover it near the end so the top is bubbling and golden when it reaches the table.

If you enjoy potato dishes with bold seasoning, you may also like these garlic scalloped potatoes, which offer another cozy variation for a family dinner.

Ingredients You’ll Need

Choose russet or Yukon Gold potatoes for this casserole. Russets give the sauce plenty of starch and have a fluffy texture, while Yukon Gold potatoes are naturally buttery and hold their shape well. Either choice works as long as the slices are thin and consistent.

• Potatoes: Three pounds, peeled or scrubbed, then sliced about 1/8 inch thick.
• Onion: One thinly sliced yellow onion adds gentle sweetness and savory depth.
• Butter and flour: These form the simple roux that thickens the sauce.
• Milk and half-and-half: Whole milk keeps the sauce balanced, while half-and-half or heavy cream provides richness.
• Cheese: Sharp cheddar supplies the main cheese flavor, and Parmesan brings extra saltiness and browning.
• Seasonings: Kosher salt, black pepper, and garlic powder or fresh minced garlic keep the flavor classic.
• Fresh herbs: Parsley or chives are optional, but their fresh color is a lovely contrast to the rich casserole.

Grate the cheese yourself when possible. Freshly shredded cheese generally melts more smoothly than pre-shredded cheese, and it gives the finished potatoes a softer, more cohesive topping.

How to Make It Step-by-Step

Step 1: Heat the oven to 375°F and grease a 9-by-13-inch baking dish with a thin coating of butter or cooking spray. Greasing helps with serving later and keeps the edges from sticking as the sauce thickens.

Step 2: Prepare the potatoes by peeling them or scrubbing them thoroughly, then slice them into rounds about 1/8 inch thick. A mandoline makes uniform slices quickly, but a sharp chef’s knife works well if you take your time. Do not rinse the slices, since the potato starch helps the sauce thicken during baking.

Step 3: Make the sauce by melting 4 tablespoons of unsalted butter in a saucepan over medium heat. Whisk in the flour and cook for about 1 minute, just until the mixture is smooth and lightly foamy, without allowing it to brown.

Step 4: Slowly whisk in the whole milk and half-and-half or heavy cream. Adding the liquids gradually helps prevent lumps. Stir in the kosher salt, black pepper, and garlic powder or minced garlic, then simmer for 3–5 minutes, whisking frequently, until the sauce lightly thickens.

Step 5: Arrange one-third of the potato slices and onion in the prepared baking dish. Spread them into an even layer so the sauce can reach all the pieces, then pour over one-third of the creamy sauce and sprinkle with some of the cheddar and Parmesan.

Step 6: Repeat the potato, onion, sauce, and cheese layers two more times. Finish with the remaining sauce and cheese on top, making sure the corners and edges receive some coverage so they do not dry out during baking.

Step 7: Cover the baking dish tightly with foil and bake for 45–50 minutes. The foil traps steam, which is important for cooking the potato center before the cheese topping becomes too dark.

Step 8: Carefully remove the foil and continue baking for 20–25 minutes. The casserole is ready when a thin knife slides easily into the center and the top is browned, bubbling, and richly fragrant.

Step 9: Let the potatoes rest for 10–15 minutes before serving. This short pause allows the sauce to settle between the layers, so each spoonful is creamy rather than watery. Add chopped parsley or chives just before bringing the dish to the table.

Chef’s Tips for Tender, Creamy Potatoes

The most important detail is slice thickness. Potato rounds that are thicker than 1/8 inch, or slices that vary widely in size, may cook unevenly. The thin slices near the top can brown while thicker pieces in the center remain firm.

Keep the foil tightly sealed during the first bake. Steam helps soften the potatoes and prevents the sauce from losing too much moisture before the center is tender. Uncovering only for the final 20–25 minutes gives the cheese time to brown without overcooking the dish.

Do not rush the sauce. The flour needs about 1 minute in the butter, and the milk mixture needs 3–5 minutes of gentle simmering to lightly thicken. It should coat a spoon but still be pourable, because the potatoes absorb some of the liquid as they bake.

• Use a 9-by-13-inch baking dish so the layers are not too deep.
• Season the sauce rather than sprinkling large amounts of salt directly over each layer.
• Set the baking dish on a sheet pan if you want to protect the oven from a possible overflow.
• Let the casserole rest before cutting or scooping it.

For another comforting potato centerpiece, take a look at this taco stuffed potato recipe. It uses familiar pantry flavors in a completely different format.

What to Serve with Cheesy Scalloped Potatoes

This casserole pairs especially well with simply seasoned meats because its creamy cheese sauce can stand in for a rich gravy. Serve it beside roast chicken, baked ham, pork chops, beef tenderloin, or a seared steak.

A crisp green vegetable helps balance the richness. Try steamed green beans, roasted broccoli, asparagus, or a fresh salad with a tangy vinaigrette. For a complete comfort-food spread, this dish also sits nicely beside cheesy steak roll-ups and a bright vegetable side.

For casual gatherings, portion the potatoes with a large spoon so every serving includes tender center pieces, browned top cheese, and sauce from the bottom. The casserole is hearty enough for a holiday table but easy enough for a weeknight family dinner.

Storage and Reheating

Allow leftovers to cool, then cover the baking dish or transfer the potatoes to an airtight container. Refrigerate them and enjoy within a few days for the best texture. The sauce may thicken as it chills, but it loosens again when warmed.

Reheat individual portions in the microwave until hot, using short intervals and covering the portion loosely to help retain moisture. For a larger amount, cover the dish with foil and warm it in a moderate oven until heated through, then uncover briefly if you want the top to regain some color.

Because the cheese topping becomes pleasantly crisp after reheating, leftovers can feel like a fresh side dish rather than a repeat meal. Serve a small portion with eggs for brunch or alongside a simple roasted protein.

If your family enjoys cheesy casseroles, you can round out the menu with this cheesy tater tot casserole for another satisfying baked dish.

Helpful Variations

The classic cheddar and Parmesan combination is dependable, but the recipe leaves room for small changes. Gruyère can provide a nutty flavor, while Monterey Jack creates a mild and especially soft melt. Keep the total cheese amount close to the recipe quantities so the sauce remains balanced.

You can add a small pinch of paprika or thyme to the sauce for a different flavor profile. Dijon mustard is another option when you want a subtle tang, though it should complement rather than overpower the cheddar.

For a smoky dinner-party version, cooked bacon can be scattered between the layers. If using additional salty ingredients, taste the sauce before layering and be mindful of the salt already present in the cheese.

These potatoes are also a natural partner for pasta lovers. A family-style meal featuring cheesy baked spaghetti and a green salad gives you a generous comfort-food menu for a crowd.

Final Thoughts

This cheesy scalloped potatoes recipe is a reliable classic because every part has a purpose: thin slices cook evenly, the roux-based sauce stays creamy, and the covered-then-uncovered baking method produces tender potatoes with a beautifully browned top.

Give the finished casserole 10–15 minutes to rest before serving, then garnish it with parsley or chives for a fresh finish. Whether it appears at a holiday dinner, Sunday supper, or an ordinary family meal, this warm, bubbling dish is likely to disappear quickly.