This is the kind of weeknight recipe I lean on when the day has been long and everyone still expects something warm and comforting from the oven. These creamy Alfredo potatoes rely on jarred Alfredo sauce and just three simple add-ins, all poured over diced russet potatoes in a baking dish. Alfredo sauce, an American-Italian offshoot of the original Roman fettuccine al burro, brings ready-made richness and garlic notes without any fuss. The result is a bubbling, golden pan of tender potatoes in a velvety sauce that feels like a cross between scalloped potatoes and a casserole—minimal prep, maximum comfort.
Serve these creamy Alfredo potatoes as a hearty side with roasted or grilled chicken, pork chops, or a simple seared steak. For a lighter plate, pair them with a crisp green salad dressed in a tangy vinaigrette to balance the richness. They also work beautifully alongside steamed green beans, roasted broccoli, or sautéed spinach. If you’d like to turn them into a main course, add a bright tomato salad and some crusty bread for scooping up every last bit of sauce.
Oven-Baked 5-Ingredient Creamy Alfredo PotatoesServings: 6
Ingredients
2 1/2 pounds russet potatoes, peeled (optional) and diced into 1/2-inch cubes
1 (15–16 ounce) jar Alfredo sauce
1 cup shredded mozzarella cheese
1/2 teaspoon kosher salt
1/2 teaspoon freshly ground black pepper
Nonstick cooking spray or 1 teaspoon neutral oil, for greasing the baking dish (optional, not counted in 5 ingredients)
Directions
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish with nonstick spray or a little oil so the potatoes and sauce don’t stick.
Prepare the potatoes: Scrub the russet potatoes well. Peel them if you prefer a smoother texture, or leave the skins on for a bit more flavor and fiber. Dice the potatoes into roughly 1/2-inch cubes so they cook evenly and become tender in the same amount of time.
Add the potatoes to the baking dish: Spread the diced russet potatoes evenly in the prepared baking dish, breaking up any pieces that are stuck together so the sauce can reach all the surfaces.
Season the potatoes: Sprinkle the kosher salt and black pepper evenly over the potatoes. This step seasons the potatoes themselves so the dish doesn’t rely only on the Alfredo sauce for flavor.
Pour on the jarred Alfredo sauce: Open the jar of Alfredo sauce and pour it evenly over the seasoned diced potatoes in the baking dish. Use a spatula or spoon to gently stir and fold until all the potato pieces are well coated and the sauce is distributed from corner to corner.
Top with mozzarella: Sprinkle the shredded mozzarella cheese in an even layer over the sauced potatoes. This will melt and brown, giving you a cheesy, golden top that contrasts nicely with the creamy interior.
Cover and bake: Cover the baking dish tightly with aluminum foil. Place it on the center rack and bake for 35–40 minutes, until the potatoes begin to turn tender when pierced with a fork. Covering traps steam, which helps the potatoes cook through without the sauce drying out.
Uncover and finish baking: Remove the foil and return the dish to the oven. Bake uncovered for another 15–20 minutes, or until the potatoes are fully tender, the Alfredo sauce is bubbling around the edges, and the cheese on top is melted and lightly golden in spots.
Rest before serving: Let the dish rest for about 5–10 minutes after it comes out of the oven. This brief rest allows the sauce to thicken slightly and makes it easier to scoop neat portions.
Serve: Spoon the creamy Alfredo potatoes onto plates or into shallow bowls. Serve hot as a cozy side dish, or make it the star of the plate with a simple salad or steamed vegetables alongside.
Variations & Tips
To keep this recipe true to its five-ingredient spirit, I’ve kept the base very simple, but there’s plenty of room to play. For extra flavor, you can swap part of the mozzarella for shredded Parmesan or an Italian blend; just stay within the same 1-cup total so the sauce doesn’t become too thick. A pinch of garlic powder or Italian seasoning mixed into the Alfredo sauce before pouring can deepen the flavor without adding prep time. If you’d like a bit of color, scatter 1–2 tablespoons of finely chopped fresh parsley or chives over the top right after baking (this would be an optional garnish beyond the core five ingredients). To turn this into more of a main dish, you can fold in 1–1 1/2 cups of cooked diced chicken or crumbled cooked Italian sausage along with the potatoes before baking—just be sure any added meat is fully cooked and still within its safe storage window. For a slightly lighter version, look for a lighter Alfredo sauce or use half Alfredo and half low-sodium chicken broth, knowing the sauce will be a bit thinner. Food safety notes: Keep jarred Alfredo sauce refrigerated after opening and use it within the timeframe indicated on the label. If you dice the potatoes ahead, store them fully submerged in cold water in the refrigerator for up to 24 hours to prevent browning; drain and pat dry before baking so excess water doesn’t dilute the sauce. Always bake until the potatoes are completely tender and the casserole is piping hot in the center—at least 165°F (74°C) if you’re reheating leftovers. Cool leftovers promptly, refrigerate within 2 hours, and enjoy within 3–4 days, reheating only the portion you plan to eat.
