Scalloped Potatoes Recipe for 9x12 Dish

Scalloped potatoes baked in a 9×12 dish are a classic comfort food that combines tender, thinly sliced potatoes with a creamy, cheesy sauce. This dish is perfect for family dinners, holiday gatherings, or any occasion where you want a rich, satisfying side that pairs well with meats or salads. Its layered presentation and flavorful topping make it a crowd-pleaser every time.

Ingredients

4 large Russet potatoes (about 2 pounds), peeled and thinly sliced
2 cups shredded sharp cheddar cheese
1 cup grated Parmesan cheese
2 cups whole milk or heavy cream
1 cup sour cream
4 tablespoons unsalted butter, melted
3 cloves garlic, minced
1 teaspoon salt
½ teaspoon black pepper
½ teaspoon paprika (optional, for color)
2 tablespoons chopped fresh parsley (for garnish)

Instructions

Preheat your oven to 375°F (190°C). Grease a 9×12-inch baking dish with butter or non-stick spray to prevent sticking.

Prepare the potatoes by peeling and slicing them very thinly, about 1/8 inch thick. Using a mandoline slicer helps achieve uniform slices for even cooking.
In a large mixing bowl, combine the milk or heavy cream, sour cream, melted butter, minced garlic, salt, black pepper, and paprika if using. Whisk until well blended.
Layer half of the sliced potatoes in the prepared dish, overlapping slightly to cover the bottom evenly. Sprinkle half of the shredded cheddar and grated Parmesan cheese over the potatoes.

Repeat the layering with the remaining potatoes and cheeses, finishing with a layer of cheese on top for a cheesy crust.
Pour the prepared cream mixture evenly over the layered potatoes, ensuring the slices are submerged for even cooking.
Cover the dish tightly with aluminum foil and bake in the preheated oven for 45 minutes.

After 45 minutes, remove the foil and continue baking for an additional 20-25 minutes, or until the top is golden brown and bubbly.
Remove from the oven and let it rest for about 10 minutes before serving. Garnish with chopped parsley for a fresh touch.

Tips

Substitutions: You can substitute heavy cream with half-and-half or whole milk for a lighter version. Cheddar can be replaced with Gruyère or Monterey Jack for different flavors.

Prevent uneven cooking: Slicing potatoes uniformly ensures even baking and a better texture.
Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven or microwave to prevent drying out.
Common mistake to avoid: Overlapping the potatoes too thickly can lead to uneven cooking. Make sure slices are thin and evenly layered.

Serving Suggestions

Serve scalloped potatoes as a hearty side dish alongside roasted chicken, beef, or pork. They also pair well with a fresh green salad or steamed vegetables for a balanced meal. For a complete comfort food spread, add a crusty bread or dinner rolls.

Variations

For a twist on the classic, consider adding cooked bacon bits, sautéed onions, or sliced mushrooms between the layers. You can also spice it up with a dash of cayenne pepper or smoked paprika for extra flavor. Vegetarian versions work perfectly by using vegetable broth instead of cream and adding layers of sautéed vegetables like zucchini or spinach.

Storage and Reheating

Leftover scalloped potatoes can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, cover with foil and bake at 350°F (175°C) for about 20-25 minutes until heated through and bubbly. If reheating in the microwave, do so in 1-2 minute intervals, stirring gently to distribute heat evenly. For best results, reheat in the oven to preserve the crispy top.

Frequently Asked Questions

Can I prepare scalloped potatoes ahead of time?

Yes, you can assemble the dish a day in advance. Cover it tightly with plastic wrap and refrigerate. When ready to bake, remove from the fridge and let it sit at room temperature for about 30 minutes before baking. Adjust the baking time slightly if the dish is cold from refrigeration.

How do I prevent the top from burning or becoming too crispy?

To avoid burning, cover the dish with foil during the initial baking phase. Remove the foil in the last 20 minutes to allow the cheese to brown. Keep an eye on it toward the end to ensure it doesn’t over-brown.

Can I make this dish gluten-free?

Absolutely. Simply omit the flour or use a gluten-free thickener if you prefer a thicker sauce. The recipe as written is naturally gluten-free, assuming all dairy products are gluten-free.

What type of potatoes work best for scalloped potatoes?

Russet potatoes are ideal due to their starchy texture, which helps them become tender and absorb flavors well. Yukon Gold potatoes can also be used for a creamier, slightly buttery flavor, but they may be softer and break down more easily.

Is it necessary to peel the potatoes?

Peeling is recommended for a smoother, more refined dish, but leaving the skin on can add texture and nutrients. If you choose to leave the skin, wash the potatoes thoroughly and slice evenly.

Scalloped Potatoes Recipe for 9×12 Dish