My neighbor shared this recipe in 1972 and it became our family staple. The cheese gets perfectly bubbly every time.

This oven-baked 4-ingredient potato cheese scallop is the kind of comforting, no-fuss dish that feels like a warm hug at the end of a long day. My neighbor, Mrs. Thompson, passed this recipe to me back in 1972, and it quickly became a staple on our family table. It’s simple enough for a busy weeknight but special enough for holidays. With just potatoes, cheese, milk, and butter, you get tender layers of potatoes under a perfectly bubbly, golden cheese crust that looks like it came straight out of a cozy Midwestern church cookbook.

Serve these scalloped potatoes piping hot right out of the oven, when the cheese is still bubbling and the layers are creamy. They pair beautifully with roasted chicken, meatloaf, ham, or simple pan-fried pork chops. Add a crisp green salad or steamed green beans to balance the richness, and maybe a basket of warm rolls if you’re feeding a crowd. Leftovers reheat nicely alongside scrambled eggs or a simple omelet for a hearty breakfast-for-dinner night.

Servings: 6

2 tablespoons unsalted butter, plus extra for greasing the dish

Preheat your oven to 375°F (190°C). Generously butter a deep 2-quart casserole or baking dish, making sure to coat the bottom and sides so the potatoes don’t stick.

Peel the potatoes and slice them into thin rounds, about 1/8 inch thick. Try to keep the slices even so they cook at the same rate. If you’re working slowly, you can keep the slices in a bowl of cold water to prevent browning, then pat them dry before layering.

Scatter a small pat of butter over the bottom of the prepared dish, then add a single, even layer of potato slices, slightly overlapping them like shingles.

Sprinkle a light pinch of salt and pepper over the potatoes if using, then add a generous handful of shredded cheese to cover the layer. Don’t pack it down; just let it fall naturally between the slices.

Repeat the layering process: potatoes, a light pinch of salt and pepper, and cheese, until you’ve used all the potatoes. Reserve a good handful of cheese for the very top so you get that bubbly, golden crust.

Slowly pour the milk over the layered potatoes, aiming to distribute it evenly so it seeps down between the slices. The milk should come just below the top layer of potatoes; if your dish is very deep, you may not need all the milk, or you may add a splash more if it looks dry.

Dot the top with the remaining butter, then finish with the reserved cheese in an even layer over the surface. This is what will turn into that beautiful crust you see in the casserole dish.

Cover the dish tightly with foil and place it on the middle rack of the preheated oven. Bake for 40 minutes, until the potatoes start to soften and the milk is gently bubbling around the edges.

Carefully remove the foil (watch for steam), then continue baking uncovered for another 25 to 35 minutes, or until the potatoes are very tender when pierced with a knife and the cheese on top is deeply golden and bubbling. If your top isn’t browning enough, move the dish up one rack for the last 5 to 10 minutes.

Once the cheese is beautifully browned and the casserole is bubbling, remove the dish from the oven and let it rest for at least 10 to 15 minutes. This helps the layers set up so you can see those distinct potato slices when you scoop, and keeps the creamy sauce from running all over the plate.

Serve warm, scooping down through the layers so everyone gets tender potatoes, creamy sauce, and a good bit of that golden, bubbly cheese crust on top.

For picky eaters, you can use a milder cheese like Colby or a mild cheddar so the flavor isn’t too sharp. If your family likes a little extra richness, swap 1/2 to 1 cup of the milk for heavy cream for an even creamier sauce. For a touch of onion flavor without adding another ingredient to the dish, you can serve these alongside sautéed onions or sprinkle a little onion powder over the potato layers (if you don’t mind stretching beyond the original four ingredients). If you want to prep ahead, you can assemble the casserole earlier in the day, cover, and refrigerate; let it sit on the counter for 20 to 30 minutes while the oven preheats, then bake as directed, adding a few extra minutes if needed. For food safety, always refrigerate leftovers within 2 hours of baking, store them in a covered container, and use within 3 to 4 days. Reheat leftovers thoroughly in the oven or microwave until steaming hot in the center (165°F/74°C). When slicing potatoes, use a sharp knife or mandoline carefully, keeping fingers tucked away from the blade. Make sure the casserole is bubbling in the center and the potatoes are fully tender before serving to ensure they are properly cooked. If the top browns too quickly before the potatoes are done, loosely tent with foil to prevent burning while the inside finishes cooking.