Cheesy Scalloped Potatoes Recipe
Introduction
Cheesy scalloped potatoes are a comforting and classic side dish perfect for any occasion. Layers of tender potatoes and onions are baked in a rich, creamy cheese sauce that’s both simple to make and deliciously satisfying.

Ingredients
- 4 russet potatoes, peeled and sliced into ¼-inch slices (about 2 pounds)
- 1 yellow onion, sliced into rings
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- ½ teaspoon kosher salt
- 2 cups whole milk, room temperature
- 1 ½ cups mild cheddar cheese, shredded
- Salt and pepper to taste
Instructions
- Step 1: Preheat your oven to 400°F. Lightly spray an 8×8-inch casserole dish with nonstick cooking spray.
- Step 2: Arrange the sliced potatoes and onions in the dish, alternating layers of potato and onion rings.
- Step 3: In a medium saucepan, melt the butter over medium heat. Whisk in the flour and kosher salt, stirring constantly for about one minute.
- Step 4: Gradually stir in the whole milk and continue cooking, stirring frequently, until the mixture thickens.
- Step 5: Remove from heat and stir in the shredded cheddar cheese until completely melted and smooth.
- Step 6: Pour the cheese sauce evenly over the arranged potatoes and onions. Cover the dish tightly with aluminum foil.
- Step 7: Bake in the preheated oven for 85 to 90 minutes, or until the potatoes are tender when pierced with a fork.
- Step 8: For a crispy top, switch your oven to broil and broil the dish until the cheese is golden brown and bubbly—watch carefully to avoid burning.
- Step 9: Season with salt and pepper to taste, then serve warm.
Tips & Variations
- Use a mandoline slicer for uniform potato slices to ensure even cooking.
- Try adding a pinch of nutmeg or garlic powder to the cheese sauce for extra flavor.
- Swap mild cheddar for sharp cheddar or Gruyère to deepen the cheese flavor.
- Add cooked bacon or ham between layers for a meatier version.
Storage
Store any leftover scalloped potatoes covered in the refrigerator for up to 3 days. To reheat, warm in the oven at 350°F until heated through, or microwave individual portions for 1-2 minutes. Avoid microwaving covered tightly with foil.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I use a different type of potato?
Yes, while russet potatoes work best for their texture, Yukon Gold potatoes can also be used for a creamier result. Avoid waxy potatoes as they won’t soften as well.
How can I make this recipe gluten-free?
Replace the all-purpose flour with a gluten-free flour blend or cornstarch to thicken the sauce. Make sure your other ingredients, like cheese, do not contain gluten additives.
PrintCheesy Scalloped Potatoes Recipe
This classic Cheesy Scalloped Potatoes recipe features tender layers of sliced russet potatoes and onions baked in a rich, creamy cheddar cheese sauce. With a perfectly golden, bubbly top and a smooth, velvety texture inside, this comforting casserole is an ideal side dish for any occasion.
- Prep Time: 20 minutes
- Cook Time: 1 hour 25 minutes
- Total Time: 1 hour 45 minutes
- Yield: 8 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: American
Ingredients
Potatoes and Onion
- 4 russet potatoes, peeled and sliced into ¼-inch slices (about 2 pounds)
- 1 yellow onion, sliced into rings
Cheese Sauce
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- ½ teaspoon kosher salt
- 2 cups whole milk, room temperature
- 1 ½ cups mild cheddar cheese, shredded
- Salt and pepper to taste
Instructions
- Preheat oven and prepare dish: Preheat the oven to 400°F. Lightly spray an 8×8-inch casserole dish with nonstick cooking spray to prevent sticking.
- Arrange potatoes and onions: Layer the sliced potatoes and onions in the prepared dish, alternating between potato slices and onion rings for even distribution of flavors.
- Make cheese sauce: In a medium saucepan, melt butter over medium heat. Stir in the flour and kosher salt, whisking constantly for one minute to form a roux.
- Thicken sauce: Gradually whisk in the room temperature milk. Continue cooking and stirring until the sauce has thickened and coats the back of a spoon.
- Add cheese: Remove the saucepan from heat, then immediately stir in all the shredded cheddar cheese until melted and the sauce is smooth, about 30 to 60 seconds.
- Combine and cover: Pour the cheese sauce evenly over the layered potatoes and onions. Cover the casserole dish tightly with aluminum foil.
- Bake: Bake in the preheated oven for 85-90 minutes, or until the potatoes are tender when pierced with a fork.
- Broil for topping: Remove the foil, set the oven to broil, and broil the casserole until the top turns golden brown and crispy, watching carefully to avoid burning.
- Season and serve: Season the scalloped potatoes with salt and pepper to taste. Serve hot as a comforting side dish.
Notes
- Use room temperature milk to ensure a smooth cheese sauce without lumps.
- Russet potatoes work best for a creamy texture as they absorb the sauce well.
- Covering with foil while baking prevents the top from drying out before the potatoes cook through.
- Broiling at the end creates an appetizing golden crust for texture contrast.
- For a richer flavor, consider adding a pinch of nutmeg or garlic powder to the cheese sauce.
Keywords: scalloped potatoes, cheesy potatoes, potato casserole, baked potatoes, comfort food, cheddar cheese, side dish

