Oven Baked French Onion Potato Bake

If you love easy comfort food, this French onion potato bake deserves a spot on your dinner table. Made with just four simple ingredients, this creamy, cheesy potato casserole combines thinly sliced russet potatoes, savory French onion soup, rich heavy cream, and melted Swiss cheese for a side dish that tastes like it took hours to prepare.

Perfect for Sunday dinners, holiday gatherings, potlucks, and busy weeknight meals, this oven-baked potato casserole delivers tender layers of potatoes coated in a rich onion sauce and topped with golden, bubbly cheese. It’s an easy, budget-friendly recipe that pairs beautifully with roasted chicken, meatloaf, turkey, or your favorite beef dinner.

Ingredients

• 2 pounds russet potatoes, peeled and thinly sliced
• 1 can (10.5 ounces) French onion soup
• 1 cup heavy cream
• 2 cups shredded Swiss cheese

Instructions

1. Preheat your oven to 375°F and lightly grease an 8-inch square baking dish.
2. Arrange the thinly sliced potatoes in even layers inside the prepared dish.
3. Pour the French onion soup over the potatoes, allowing the savory onion broth to seep between the slices.
4. Drizzle the heavy cream evenly over the top and gently press the potatoes down to distribute the liquid.
5. Cover tightly with aluminum foil and bake for 45 minutes.
6. Remove the foil, sprinkle the shredded Swiss cheese evenly over the potatoes, and bake uncovered for another 20–25 minutes, until the potatoes are fork-tender and the cheese is melted and golden.
7. Let the casserole rest for 10 minutes before serving so the creamy sauce can thicken slightly.

Benefits of This Easy Potato Casserole

• Only 4 ingredients: A simple recipe that makes everyday cooking easier without a long shopping list.
• Easy preparation: Layer the ingredients, bake, and let the oven do most of the work.
• Budget-friendly comfort food: Potatoes and a few pantry staples create a satisfying side dish for family meals.
• Rich, savory flavor: French onion soup adds delicious onion flavor, while cream and Swiss cheese create a smooth, cheesy finish.
• Perfect for gatherings: This cheesy potato casserole is ideal for potlucks, holiday dinners, Sunday suppers, and family celebrations.
• Make-ahead friendly: Assemble the dish in advance and refrigerate until you’re ready to bake.
• Versatile side dish: Serve it with roasted chicken, turkey, meatloaf, grilled beef, or steamed vegetables.

Helpful Tips for the Best Results

• Slice the potatoes evenly so they cook at the same rate.
• Cover the baking dish tightly during the first stage of baking to help the potatoes become tender.
• For extra flavor, substitute part of the Swiss cheese with Gruyère.
• Let the casserole rest before serving to help the sauce settle and make serving easier.
• Store leftovers in an airtight container in the refrigerator and reheat thoroughly before serving.