Cheesy Onion Scalloped Potatoes
These incredibly easy Cheesy Onion Scalloped Potatoes require only 4 ingredients and minimal prep work! Thinly sliced potatoes are baked in a rich, savory onion cream sauce and topped with melted cheese for the ultimate comfort food side dish.
Ingredients
- 2 pounds russet or Yukon Gold potatoes thinly sliced
- 1 packet onion soup mix
- 1 cup heavy cream
- 1 ½ cups shredded mozzarella or Swiss cheese
Instructions
- Preheat & Prep: Preheat oven to 375°F (190°C). Grease a medium baking dish.
- Layer Potatoes: Layer the thinly sliced potatoes evenly in the prepared baking dish.
- Mix Sauce: In a bowl, whisk together the heavy cream and onion soup mix. Pour evenly over the potatoes.
- Add Cheese: Sprinkle the shredded cheese evenly over the top of the potato and cream mixture.
- First Bake (Covered): Cover the baking dish tightly with foil and bake for 45 minutes.
- Second Bake (Uncovered): Remove foil and continue baking for 20–25 minutes, until the potatoes are tender and the top is golden and bubbly.
- Rest & Serve: Let the casserole rest for 5 minutes before serving to allow the creamy sauce to set up.
Notes
Pro-Tip: For the absolute best cheese melt, always grate your mozzarella or Swiss cheese fresh from a block. Pre-shredded cheeses in bags are coated with anti-caking powders (like cellulose) that can prevent them from melting smoothly and can cause a grainy texture on top of your beautiful casserole!
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