Cheesy Scalloped Potatoes Recipe

This Cheesy Scalloped Potatoes Recipe is one of those side items for dinner that never lasts long on the table. The potatoes bake up tender, the sauce turns thick and creamy, and the cheese on top gets golden and bubbly. I made these for Thanksgiving last year and they were gone before the turkey even cooled down.

The method is straightforward. You slice potatoes thin, layer them with onions in a baking dish, then pour a homemade cheese sauce over everything. The whole thing bakes covered for most of the time, which steams the potatoes and keeps them soft. Then you uncover it at the end to brown the top. If you are looking for simple Thanksgiving side dishes or potato side dishes Thanksgiving guests will actually finish, this is a reliable choice.

Ingredients for Cheesy Scalloped Potatoes Recipe

This recipe uses basic ingredients, nothing fancy. The key is slicing the potatoes evenly so they cook at the same rate. A mandoline helps, but a sharp knife works too if you take your time.

1. 4 large russet potatoes (about 2 pounds), peeled and sliced 1/8 to 1/4 inch thick
2. 1 medium yellow onion, sliced into thin rings
3. 3 tbsp unsalted butter
4. 3 tbsp all-purpose flour
5. 1/2 tsp kosher salt, plus more for seasoning layers
6. 1/4 tsp black pepper, plus more for seasoning layers
7. 2 cups whole milk, room temperature
8. 1 1/2 cups mild cheddar cheese, shredded and divided

Russet potatoes are starchy, which helps thicken the sauce as they bake. Yukon Gold potatoes also work if you want a creamier texture. Avoid waxy potatoes like red potatoes, they do not soften as well in this recipe.

How to make this side dish for Thanksgiving

Preheat your oven to 400°F. Lightly grease a 9×13 inch baking dish with butter or cooking spray. Slice the potatoes as evenly as possible. If the slices are too thick, they will not cook through. If they are too thin, they might turn mushy. Aim for somewhere between 1/8 and 1/4 inch.

Layer half of the potato slices in the bottom of the prepared dish, slightly overlapping them. Scatter half of the sliced onions over the potatoes. Season this layer lightly with salt and pepper. Repeat with the remaining potatoes and onions, seasoning again.

In a medium saucepan, melt the butter over medium heat. Once melted, whisk in the flour and salt. Keep whisking constantly for about 1 minute. The mixture will look like thick paste. This step cooks the raw flour taste out and creates a roux, which thickens the sauce.

Slowly pour in the milk while continuing to whisk. The sauce will start thin, then gradually thicken as it heats. Keep stirring to prevent lumps. Once the sauce starts to bubble and thicken, stir in 1 cup of the shredded cheddar cheese. Keep stirring until the cheese melts completely and the sauce is smooth. [file:65]

Pour the cheese sauce evenly over the layered potatoes and onions. Use a spoon or spatula to make sure the sauce gets into all the gaps. Cover the dish tightly with aluminum foil.

Bake covered for 45 minutes. This trapped steam softens the potatoes. After 45 minutes, remove the foil and sprinkle the remaining 1/2 cup of cheddar cheese over the top. Return the dish to the oven uncovered and bake for another 35 to 45 minutes, or until the potatoes are fork-tender and the top is golden brown.

If you want a darker, crispier top, turn on the broiler for the last 3 to 4 minutes. Watch it closely so it does not burn. Let the dish rest for 15 to 20 minutes before serving. This resting time lets the sauce thicken up even more.

Make-ahead tips for fall recipes side dishes

You can prep this Cheesy Scalloped Potatoes Recipe up to 2 days ahead, which is useful when you are planning Thanksgiving recipes for 2 or a bigger gathering. Assemble the entire dish, but stop before baking. Cover it tightly with plastic wrap and then aluminum foil, and refrigerate.

When you are ready to bake, take the dish out of the fridge about 30 minutes before it goes in the oven. This helps it come to room temperature, which means more even cooking. Bake covered at 400°F for 50 to 60 minutes, then uncover and bake for another 35 to 40 minutes until heated through and golden on top.

You can also freeze this dish. Bake it covered for 45 minutes and uncovered for 20 minutes, then let it cool completely. Wrap tightly in plastic wrap and then foil, and freeze for up to 3 months. Thaw in the fridge overnight before reheating. Reheat covered at 350°F for about 30 to 40 minutes, then uncover and bake until warmed through.

Ingredient swaps and variations

This recipe is flexible. You can change up the cheese, add protein, or adjust the seasonings based on what you have or what you prefer for your fall sides dishes menu.

• Swap cheddar for Gruyere, Fontina, or Parmesan for a different flavor. Gruyere gives a nuttier, more complex taste.
• Add cubed cooked ham between the potato layers to turn this into a main dish instead of a side.
• Mix in fresh thyme, rosemary, or garlic powder to the cheese sauce for extra flavor.
• Use heavy cream instead of milk for an even richer sauce, or use half-and-half for a lighter version.
• Skip the onions if you are not a fan, or swap them for thinly sliced leeks.
• Add a layer of crispy bacon bits on top before the final bake for a smoky touch.

Storage and reheating instructions

Store leftover Cheesy Scalloped Potatoes Recipe in an airtight container or cover the baking dish tightly with foil. Keep in the refrigerator for up to 5 days. The potatoes will firm up as they cool, but they reheat well. [web:73]

To reheat, cover the dish with foil and bake at 350°F for 20 to 30 minutes, or until warmed through. You can also reheat individual portions in the microwave for 1 to 2 minutes on medium power. If the sauce looks too thick after reheating, stir in a splash of milk to loosen it up.

If freezing leftovers, wrap the cooled potatoes tightly in plastic wrap and then foil. Freeze for up to 3 months. Thaw overnight in the fridge before reheating.

Common mistakes to avoid

A few small mistakes can mess up the texture or flavor of this dish, but they are easy to avoid once you know what to watch for.

• Do not skip covering the dish for the first part of baking. The foil traps steam, which softens the potatoes. Without it, the top layer can dry out before the bottom cooks.
• Slice the potatoes evenly. Uneven slices mean some pieces will be mushy while others are still hard.
• Use room temperature milk when making the sauce. Cold milk can cause the roux to seize up and create lumps.
• Do not overbake. If the sauce starts bubbling out and the edges look dry, cover the dish again or lower the oven temperature slightly.
• Let the dish rest before serving. Cutting into it too soon means the sauce will be runny and will not have thickened properly.

Why this works as foods to make with potatoes

This recipe works because the starchy potatoes release starch as they bake, which thickens the cheese sauce naturally. The layering technique ensures every bite has potato, onion, and creamy cheese. Baking covered first steams the potatoes, then uncovering them allows the top to brown and get crispy. [file:65]

The combination of butter, flour, and milk creates a classic béchamel sauce, which is stable and smooth. Adding cheese turns it into a Mornay sauce. This type of sauce clings to the potatoes without separating or curdling, even if you reheat it later.

These Cheesy Scalloped Potatoes Recipe also pair well with most proteins. Serve them alongside roasted turkey, baked ham, grilled chicken, or even a simple roast. They are filling enough to be the main attraction on a vegetarian table, but they also work as one of many sides for turkey dinner.

FAQ

Can I use pre-shredded cheese?
Yes, but freshly shredded cheese melts better and tastes creamier. Pre-shredded cheese has anti-caking agents that can make the sauce grainy.

Do I need to boil the potatoes first?
No, the potatoes bake directly in the sauce. Boiling them beforehand can make them too soft and mushy.

Why is my sauce watery?
The sauce can look watery right after baking. Letting the dish rest for 15 to 20 minutes allows the sauce to thicken as it cools. If it is still watery after resting, the potatoes may not have released enough starch, or the sauce was not cooked long enough.

Can I make this in a different size baking dish?
Yes, but adjust the baking time. A deeper dish will take longer to cook through, while a shallower dish will cook faster. Check for doneness by inserting a fork into the potatoes.

What if I do not have a mandoline?
Use a sharp knife and take your time. Try to keep the slices as even as possible. Uneven slices will still taste good, but the texture will be inconsistent.

Can I add vegetables to this recipe?
Yes, thinly sliced mushrooms, spinach, or bell peppers can be layered in with the potatoes. Just make sure any vegetables you add are sliced thin so they cook at the same rate as the potatoes.