When you need a comforting side dish that feels a little special without asking much of you, this simple baked potato casserole is the kind of recipe worth keeping close. It uses just a handful of easy grocery store ingredients, comes together right in one dish, and bakes up rich, creamy, and cozy enough for Sunday dinner, holiday meals, or a weeknight when you want something hearty on the table.
This dish goes especially well with baked ham, roast chicken, pork chops, or a simple green salad to balance the creamy richness. I also like serving it with steamed green beans, roasted broccoli, or buttered peas, and it fits right in on a holiday spread alongside turkey or beef.
Oven Baked 4-Ingredient Alfredo Scalloped Potatoes
Servings: 6 to 8
Ingredients
2 1/2 pounds russet potatoes, peeled and thinly sliced
1 jar (15 ounces) Alfredo sauce
2 cups shredded mozzarella cheese, divided
1/2 cup grated Parmesan cheese
Directions
1. Preheat the oven to 375°F and lightly grease a 9x13-inch glass casserole dish.
2. Spread about one-third of the sliced potatoes in an even layer in the prepared dish. Spoon over some Alfredo sauce, then sprinkle with a little mozzarella and Parmesan. Repeat the layers two more times, finishing with the remaining sauce and cheeses on top.
3. Cover the dish tightly with foil and bake for 45 minutes.
4. Remove the foil and continue baking for 25 to 35 minutes, or until the potatoes are tender when pierced with a knife and the top is golden and bubbly.
5. Let the casserole rest for 10 to 15 minutes before serving so the sauce can settle and the layers hold together better.
Variations & Tips
For even cooking: Try to slice the potatoes as evenly as possible, about 1/8 inch thick, so they all turn tender at the same time. A mandoline makes quick work of this, but a sharp knife works just fine too.
Make it extra cheesy: If your family loves a deeper cheesy top, add an extra handful of mozzarella during the last 10 minutes of baking. It will give you a more pronounced golden finish.
For picky eaters: Keep the recipe exactly as written for the smoothest, most familiar flavor. This version is mild, creamy, and kid-friendly without extra seasonings that might stand out too much.
Prep-ahead tip: You can assemble the casserole a few hours ahead, cover it, and refrigerate it before baking. If it goes into the oven cold, you may need to add 10 to 15 extra minutes to the covered baking time.
Check for doneness: Ovens and potato thickness can vary, so test the center with a thin knife. If it slides in easily, the casserole is ready. If not, cover loosely and bake a little longer.