This oven baked 3-ingredients condensed soup potato casserole is the kind of dish that quietly steals the show at every holiday table. I watched my aunt make this for over 40 years, and no matter how many fancy sides show up, this pan is always the first to disappear. It’s simple, creamy, and cozy, with golden tops and little crispy browned spots around the edges. Because it uses just potatoes, condensed soup, and butter, it’s budget-friendly and easy enough for a busy weeknight, but still special enough for Thanksgiving or Christmas.
This casserole is wonderful alongside roasted turkey, ham, or meatloaf, and it’s perfect with simple sides like green beans, a crisp salad, or steamed broccoli. The creamy potatoes soak up gravy beautifully and also pair nicely with cranberry sauce or roasted carrots. For a more casual meal, serve it with grilled or baked chicken and a side of buttered peas. Leftovers (if you’re lucky enough to have any) reheat well and make a comforting lunch with a slice of leftover meat and some pickles or a simple coleslaw.
Oven Baked 3-Ingredients Condensed Soup Potato CasseroleServings: 8
Ingredients
3 pounds russet or Yukon Gold potatoes, peeled and thinly sliced (about 1/8-inch thick)
2 cans (10.5 ounces each) condensed cream of mushroom or cream of chicken soup, undiluted
1/2 cup (1 stick) unsalted butter, melted, plus a little extra for greasing the dish
1 teaspoon kosher salt (optional, to taste)
1/2 teaspoon black pepper (optional, to taste
Nonstick cooking spray or extra butter for greasing the baking dish
Directions
Preheat your oven to 375°F (190°C). Lightly grease a deep 9x13-inch ceramic casserole dish with butter or nonstick cooking spray. A deeper dish helps get that creamy middle with golden, slightly crispy top like you see in holiday spreads.
Prep the potatoes: Peel the potatoes and slice them as evenly and thinly as you can, about 1/8-inch thick. If you have a mandoline, this is a good time to use it. Even slices help the casserole cook through evenly and give you that tender, creamy texture in every bite.
Mix the soup and butter: In a medium bowl, whisk together the condensed soup and melted butter until smooth and well combined. The mixture will be thick and rich—that’s exactly what you want for a creamy casserole that sets up nicely in the oven.
Layer the potatoes: Spread a thin spoonful of the soup mixture over the bottom of the prepared casserole dish. Add a layer of potato slices, overlapping them slightly like shingles. Spoon and spread some of the soup mixture over the potatoes, making sure you get some down into the corners and edges.
Repeat the layers: Continue layering potatoes and soup mixture until you’ve used everything, finishing with a generous layer of the soup mixture on top. The top doesn’t need to be perfectly smooth; a few ridges and bumps will brown up into those pretty golden spots.
Season the top: If using, sprinkle the salt and pepper evenly over the top layer. My aunt always did this last so the seasoning stayed on top and added a little extra flavor to the browned edges.
Cover and bake: Cover the casserole dish tightly with foil. Bake in the preheated oven for about 45 minutes. This covered time lets the potatoes steam and turn tender without drying out.
Uncover and finish baking: Carefully remove the foil (watch for steam). Return the dish to the oven, uncovered, and bake for another 25 to 35 minutes, or until the top is bubbly, golden, and has some crispy browned spots around the edges. A knife should slide easily through the center when the potatoes are fully cooked.
Rest before serving: Let the casserole rest on the counter for at least 10 to 15 minutes before serving. This helps it set up so it scoops out in nice, creamy layers instead of sliding all over the plate. It will still be piping hot inside, so this rest time also keeps little mouths from getting burned.
Serve: Bring the dish right to the table and watch it disappear. Scoop big spoonfuls, making sure everyone gets some of the soft middle and the browned, crispy edges—that’s always the first part to go in my house.
Variations & Tips
For picky eaters, use cream of chicken or cream of celery soup if they’re unsure about mushrooms. If your family likes a little extra richness, you can stir in up to 1/2 cup of milk or half-and-half to the soup-and-butter mixture to make it looser and even creamier, though the casserole may be slightly softer. To stretch the dish for a crowd, add one extra potato and an extra half can of soup, and bake in a deep dish so it doesn’t bubble over. You can also sprinkle a light handful of shredded cheddar or Colby-Jack over the top during the last 10 minutes of baking for a cheesy crust, though my aunt always kept it plain and simple. For more flavor, add a small pinch of garlic powder or onion powder to the soup mixture. If you need to prep ahead, assemble the casserole, cover tightly, and refrigerate for up to 24 hours; add 10 to 15 minutes to the covered bake time if you’re baking it straight from the fridge. Food safety tips: Keep the condensed soup refrigerated until you’re ready to mix, and don’t leave the baked casserole at room temperature for more than 2 hours. If you add any meat (like diced ham or leftover turkey), make sure it’s fully cooked before mixing it in. Cool leftovers quickly, store them in the refrigerator in a covered container, and enjoy within 3 to 4 days. Reheat thoroughly until steaming hot all the way through before serving again.
