Why This Cheesy Scalloped Potatoes Recipe Works

First, this recipe uses a roux-based cheese sauce, which means the sauce thickens before baking. As a result, the potatoes cook in a creamy, stable sauce instead of separating or becoming watery.

Next, the potatoes are thinly and evenly sliced, which allows them to cook at the same rate. Therefore, every layer becomes fork-tender at the same time.

Finally, baking the dish covered and then uncovered—followed by a short broil—creates the perfect contrast between a creamy interior and a golden, cheesy crust on top.

Ingredients

Ingredient Breakdown: Why Each One Matters

Potatoes (8–10 potatoes or about 3 pounds)

Potatoes are the foundation of this dish, so choosing the right type makes a noticeable difference. Russet potatoes are ideal because they are high in starch. As a result, they soften beautifully during baking and help naturally thicken the sauce as it cooks.

However, Yukon Gold potatoes are an excellent substitute if you prefer a creamier, slightly buttery texture. They also hold their shape well and cook a bit faster. Baby red potatoes can be used as well; they are slightly firmer and add a mild sweetness while maintaining structure.

No matter which potato you choose, slicing them thin and evenly is essential. This ensures they cook at the same rate and become perfectly fork-tender.

Heavy Cream (1 cup)

Heavy cream is responsible for the rich, luxurious texture of the sauce. Because it has a higher fat content, it helps prevent the sauce from curdling while baking at high temperatures. Additionally, it contributes to the silky mouthfeel that makes scalloped potatoes so comforting.

If needed, you can substitute half-and-half, but the final dish will be slightly less rich.

Milk (1 cup)

Milk balances the heaviness of the cream while still providing enough liquid for the potatoes to cook properly. When combined with the roux, it creates a smooth sauce that coats the potatoes evenly without becoming overly thick.

Whole milk is best, as lower-fat milk may result in a thinner sauce.

Sharp Cheddar Cheese (1 cup + extra for topping)

Sharp cheddar brings bold, classic cheesy flavor to the dish. Because it melts well, it blends smoothly into the sauce and adds richness throughout every layer. Using sharp cheddar is important because its stronger flavor stands up to the cream and potatoes.

Extra cheddar on top helps create a beautifully golden, bubbly crust during the final bake and broil.

Parmesan Cheese (½ cup + extra for topping)

Parmesan adds depth, saltiness, and a slightly nutty flavor that balances the creaminess of the sauce. Unlike cheddar, Parmesan also helps enhance browning, which contributes to the golden top layer.

Using a smaller amount prevents the dish from becoming too salty while still boosting overall flavor. Freshly grated Parmesan works best, as it melts more smoothly than pre-shredded varieties.

Butter (2 tablespoons)

Butter forms the base of the roux and adds richness to the sauce. It also helps carry flavor throughout the dish. When combined with flour, it creates a thickening agent that ensures the sauce holds together during baking.

Unsalted butter is recommended so you can control the salt level.

All-Purpose Flour (¼ cup)

Flour is the key thickening ingredient in the cheese sauce. Cooking it briefly with butter removes the raw flour taste while creating structure. Because the sauce thickens before baking, it stays creamy rather than separating in the oven.

This step is essential for preventing watery scalloped potatoes.

Garlic Parsley Salt (1 tablespoon)

Garlic parsley salt provides layered seasoning in one step. The garlic adds savory depth, the parsley brings mild freshness, and the salt enhances all the other flavors in the dish.

If you don’t have garlic parsley salt, you can substitute garlic powder, dried parsley, and salt separately.

Black Pepper (1 teaspoon)

Black pepper adds gentle heat and balances the richness of the cream and cheese. While subtle, it prevents the dish from tasting flat and enhances the savory flavors throughout.

Freshly ground black pepper gives the best flavor, but pre-ground works just fine.

Final Ingredient Tip

Because this recipe uses simple, familiar ingredients, quality matters. Using freshly grated cheese, evenly sliced potatoes, and properly cooked sauce ensures the dish bakes evenly and delivers consistent results every time.

For full list of ingredients and instructions, see recipe card below.

Instructions

Step-by-Step Instructions

1. Prepare the Potatoes

First, peel the potatoes if desired. Then, slice them thinly and evenly (about ⅛ inch thick). Because uniform slices cook evenly, this step is essential for tender results.

2. Make the Cheese Sauce

Meanwhile, melt the butter in a saucepan over medium heat. Next, whisk in the flour and cook for 1–2 minutes to remove the raw flour taste.

After that, slowly whisk in the milk and heavy cream. As the mixture heats, it will begin to thicken. Then, add the cheddar, Parmesan, garlic parsley salt, and black pepper. Stir continuously until the cheese is fully melted and the sauce is smooth.

3. Layer the Dish

Now, spread a thin layer of sauce in the bottom of a deep baking dish. Then, add a layer of sliced potatoes. Afterward, spoon more sauce over the potatoes. Continue layering until all the potatoes and sauce are used, finishing with sauce on top.

4. Bake Covered

Next, cover the dish with parchment paper and foil. Bake at 400°F for 30 minutes. During this stage, the potatoes steam and soften evenly.

5. Bake Uncovered

After 30 minutes, remove the foil. Then, lightly sprinkle extra cheese over the top. Bake uncovered at 450°F for another 30 minutes, or until the potatoes are fork-tender.

6. Broil for a Golden Top

For extra browning, switch the oven to broil for 5 minutes. However, watch closely to prevent burning.

7. Rest and Serve

Finally, let the dish rest for 10 minutes. This allows the sauce to set and makes serving easier.

For full list of ingredients and instructions, see recipe card below.

Substitutions & Variations

Here are some of my favorite substitutions and variations:

• Substitutions & Variations
• Yukon Gold potatoes: Extra creamy texture and slightly faster cooking
• Baby red potatoes: Hold their shape well and add mild sweetness
• Cheese swap: Try Gruyère, mozzarella, or Colby Jack
• Garlic boost: Add fresh minced garlic to the sauce
• Herb upgrade: Fresh thyme or rosemary pairs beautifully

What to Serve With Cheesy Scalloped Potatoes

FAQs

More Recipes You’ll Enjoy

If you love comforting, flavorful meals like these cheesy scalloped potatoes, you’ll also enjoy these recipes. Each one offers a balance of richness, texture, and versatility that works beautifully for both weeknight dinners and special occasions.

• Tuscan Chicken and Orzo
• This dish is creamy, savory, and packed with flavor from garlic, sun-dried tomatoes, and tender chicken. Because the orzo cooks right in the sauce, every bite is rich and comforting while still feeling balanced and satisfying.
• Mushroom Couscous
• Mushroom couscous is earthy, hearty, and full of umami flavor. The mushrooms add depth, while the couscous keeps the dish light and fluffy, making it a perfect side or meatless main when you want something comforting but not heavy.
• Pulled Pork Wraps
• Pulled pork wraps are flavorful, flexible, and perfect for busy nights. The tender pork pairs well with fresh toppings and sauces, creating a satisfying contrast of textures while keeping the meal fun and customizable.
• Instant Pot Beef Gravy
• This rich, savory beef gravy is a staple recipe you’ll reach for again and again. Made quickly in the Instant Pot, it’s perfect for serving over mashed potatoes, rice, or roasted meats, adding deep flavor with minimal effort.

I hope you loved this recipe! If you did, please come back to leave a rating and let me know how it went. Don’t forget to take a picture and tag me on Instagram @lilyscookingandhome