This old-fashioned oven baked 4-ingredient potato gratin is the kind of casserole that proves simple food can still steal the whole table. With just a handful of pantry and refrigerator staples, it bakes into tender layers of potatoes with creamy edges and a golden, savory top. It has the practical charm of a midcentury potluck favorite, and it is easy to see why a dish like this would have been tucked into a 1958 recipe box and brought out again and again for church suppers, family dinners, and holiday tables.
Serve this gratin alongside baked ham, roast chicken, meatloaf, pork chops, or a simple pot roast. For a potluck spread, it fits in beautifully with green beans, buttered peas, a crisp tossed salad, deviled eggs, or fruit salad. If you want to make dinner feel a little extra special at home, set it out with warm rolls and a spoonful of applesauce or cranberry sauce for a cozy, family-style meal.
Oven Baked 4-Ingredient Potato Gratin
Servings: 8
Ingredients
2 pounds russet potatoes, peeled and thinly sliced
Directions
1. Preheat the oven to 375°F and lightly grease a rectangular glass baking dish.
2. Arrange one-third of the sliced potatoes in an even layer in the dish, sprinkle with one-third of the salt and one-third of the cheddar, then drizzle with one-third of the cream. Repeat the layers two more times, finishing with cheese 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, until the potatoes are tender and the top is deeply golden and bubbling around the edges.
5. Let the gratin rest for 10 to 15 minutes before serving so the creamy layers can settle and slice more neatly.
Variations & Tips
For extra flavor: If your family likes a little more seasoning, add a pinch of black pepper or a light rub of garlic inside the baking dish before layering the potatoes. Even with a short ingredient list, those little touches can make the casserole taste even homier.
For easier slicing: Use a mandoline or very sharp knife to keep the potato slices thin and even. When the slices are close in size, they cook at the same rate and give you those tidy, pretty layers that make a gratin so special.
For picky eaters: Swap sharp cheddar for mild cheddar if you want a gentler cheese flavor. It still gives you that beautiful golden top, but the taste stays soft and familiar for little ones and anyone who prefers simpler casseroles.
Make-ahead tip: You can assemble the gratin a few hours ahead, cover it, and refrigerate it until baking time. Let the dish sit at room temperature for about 20 minutes before it goes into the oven so it bakes more evenly.
Best potato choice: Russet potatoes give the creamiest result because their starch helps thicken the cream as the gratin bakes. If that is what was in a well-used church cookbook recipe, there is a good reason it stood the test of time.
