Classic 9x13 Scalloped Potatoes Recipe for Comfort Food

Scalloped potatoes baked in a 9×13-inch dish are the perfect comfort food for family dinners and holiday gatherings. This creamy, cheesy casserole features thinly sliced potatoes layered with a rich sauce, resulting in a tender, flavorful dish that’s easy to prepare and always a crowd-pleaser. Whether you’re hosting a holiday feast or just want a hearty side, this recipe delivers satisfying results every time.

Ingredients

3 pounds (about 4-5 large) russet potatoes, peeled and thinly sliced
2 cups (480 ml) whole milk or heavy cream
1 cup (100 g) grated sharp cheddar cheese
1/2 cup (50 g) grated Parmesan cheese
3 tablespoons unsalted butter
3 tablespoons all-purpose flour
1 small onion, finely chopped
2 cloves garlic, minced
1 teaspoon salt

<2 teaspoon black pepper

<1 teaspoon dried thyme (optional)

1/4 teaspoon ground nutmeg (optional)
Fresh parsley, chopped (for garnish, optional)

Instructions

Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with butter or non-stick spray.

Prepare the potatoes by peeling and slicing them into thin, even rounds about 1/8 inch thick. Place the sliced potatoes in a bowl of cold water to prevent browning until ready to assemble.
In a medium saucepan, melt the butter over medium heat. Add the chopped onion and cook until translucent, about 3-4 minutes. Add the minced garlic and cook for another 30 seconds until fragrant.
Stir in the flour, whisking continuously to create a smooth roux. Cook for 1-2 minutes to eliminate the raw flour taste.

– Gradually pour in the milk or heavy cream, whisking constantly to prevent lumps. Continue to cook and stir until the sauce thickens, about 5 minutes.

– Remove the sauce from heat and stir in the salt, pepper, thyme, nutmeg (if using), and 3/4 cup of the grated cheddar cheese. Mix until the cheese melts and the sauce is smooth.

Drain the sliced potatoes and pat them dry with a clean towel. Spread a thin layer of the sauce over the bottom of the prepared baking dish.

Arrange a layer of potato slices over the sauce, overlapping slightly. Pour a portion of the remaining sauce over the potatoes, then sprinkle with a bit of Parmesan cheese and a little shredded cheddar.
Repeat the layering process—potatoes, sauce, cheeses—until all potatoes are used, finishing with a layer of sauce topped with cheese.
Cover the dish tightly with aluminum foil and bake in the preheated oven for 45 minutes.

Remove the foil and continue baking for an additional 15-20 minutes, or until the top is golden brown and bubbling.
Let the scalloped potatoes rest for about 10 minutes before serving. Garnish with chopped parsley if desired.

Tips

Substitutions: Use half-and-half or milk with a bit of cream for a lighter version. Cheddar can be replaced with Monterey Jack or Gruyère for different flavors.

Potato prep: To ensure even cooking, slice potatoes uniformly with a mandoline slicer. Rinsing sliced potatoes prevents excess starch, helping them cook evenly.
Prevent dryness: Do not overbake; keep an eye on the dish after the 45-minute mark to prevent drying out.
Make ahead: Assemble the casserole a day in advance, refrigerate covered, and bake directly from the fridge, adding an extra 10 minutes to the baking time.

Serving Suggestions

This creamy scalloped potatoes dish pairs beautifully with roasted chicken, grilled steak, or baked ham. Add a simple green salad or steamed vegetables for a balanced, complete meal. For a more indulgent experience, serve with a dollop of sour cream or a sprinkle of crispy bacon bits on top.

Variations

Cheese options: Mix in shredded mozzarella, pepper jack, or Swiss cheese for different flavor profiles.
Herb add-ins: Incorporate fresh thyme, rosemary, or chives into the sauce for added aroma and flavor.

Vegetable boost: Layer in sliced cooked mushrooms, cooked spinach, or thinly sliced zucchini for extra nutrition and variety.
Spicy kick: Add a pinch of cayenne pepper or hot sauce to the sauce for some heat.

Storage and Reheating

Leftover scalloped potatoes can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, cover the dish with foil and bake at 350°F (175°C) for 20-25 minutes until heated through and bubbly. Alternatively, reheat individual portions in the microwave on high for 2-3 minutes, checking and stirring halfway through. For best results, reheat slowly to preserve the creamy texture.

Frequently Asked Questions

Can I make scalloped potatoes ahead of time?

Yes, you can assemble the casserole a day in advance, cover it tightly, and refrigerate. Bake directly from the fridge, adding about 10 extra minutes to the baking time. This makes meal prep more convenient and ensures flavors meld nicely.

Can I freeze scalloped potatoes?

Freezing is possible but may affect the texture slightly, as potatoes can become a bit softer upon thawing. To freeze, let the dish cool completely, then cover tightly with plastic wrap and foil. Freeze for up to 2 months. Thaw in the refrigerator overnight and reheat as described above.

How do I prevent the potatoes from turning brown?

After slicing, place the potatoes in a bowl of cold water until ready to assemble. This prevents oxidation and browning. Drain and pat dry just before layering to ensure they cook evenly.

What if I don’t have a mandoline slicer?

You can use a sharp knife to slice potatoes as thinly and evenly as possible. Take your time to cut uniform slices for even cooking and a professional-looking dish. Alternatively, a food processor fitted with a slicing blade works well.

Can I use milk instead of cream?

Yes, replacing heavy cream with whole milk makes a lighter version. Keep in mind that the sauce may be less rich and slightly thinner, so you might want to add a little extra cheese for creaminess.

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Classic 9×13 Scalloped Potatoes Recipe for Comfort Food