My aunt made this for Sunday supper and it disappears fast every single time. It's unbelievably creamy and only needs 4 ingredients.

This oven baked 4-ingredient Amish beef and scalloped potato bake is the kind of Sunday supper that quietly steals the show and vanishes before you’ve even cleared the table. It’s inspired by the simple, hearty casseroles you still find in Midwestern Amish communities—built on pantry basics, rich with creaminess, and meant to feed a crowd without fuss. Here, thinly sliced potatoes and seasoned ground beef are tucked into a casserole dish and drenched with a shortcut creamy sauce, then baked until everything melts together into tender, spoonable layers. It’s the definition of comfort food: unfancy, deeply satisfying, and almost guaranteed to disappear fast.

Serve this casserole straight from the oven with something crisp and bright alongside to balance the richness—think a simple green salad with a tangy vinaigrette, sliced cucumbers with a splash of vinegar, or steamed green beans with lemon. Warm dinner rolls or a crusty loaf of bread are perfect for catching the extra creamy sauce around the edges. If you’d like to stretch the meal a bit further, add a side of buttered peas or roasted carrots, and finish with an uncomplicated dessert like fresh fruit or a scoop of ice cream to keep the whole meal feeling homey and relaxed.

Servings: 6

1 1/2 pounds lean ground beef

Preheat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish or a similar 3-quart casserole so the potatoes don’t stick.

In a large skillet over medium-high heat, cook the ground beef, breaking it up with a spoon, until it is fully browned and no pink remains, about 6–8 minutes. Season lightly with salt and pepper if you like (this doesn’t count as an ingredient, just a baseline seasoning). Drain off any excess fat so the casserole doesn’t become greasy.

In a medium bowl or large measuring cup, whisk together the condensed cream of mushroom soup and the whole milk until smooth and pourable. This is your creamy sauce; it will look thin now but will thicken and soak into the potatoes as it bakes.

Spread a thin layer (about 1/2 cup) of the soup mixture over the bottom of the prepared baking dish. This helps the first layer of potatoes soften evenly and keeps them from sticking.

Arrange about half of the sliced potatoes in an even layer over the bottom of the dish, overlapping them slightly like shingles. Try to keep the layer as even as possible so everything cooks at the same rate.

Scatter all of the cooked ground beef evenly over the potato layer, breaking up any larger clumps so you get beef in every bite.

Pour about half of the remaining soup-and-milk mixture evenly over the beef and potatoes, tilting the pan gently if needed to help it settle into the gaps.

Top with the remaining sliced potatoes, overlapping again to form a fairly even top layer. Pour the rest of the soup mixture over the top, making sure to moisten all exposed potatoes; gently press down with the back of a spoon if needed so the top layer just touches the sauce.

Cover the baking dish tightly with foil. Bake on the center rack for 60 minutes, until the potatoes are starting to turn tender when pierced with a knife and the sauce is bubbling around the edges.

Remove the foil and continue baking, uncovered, for another 25–35 minutes, or until the top is lightly golden in spots, the sauce is thick and creamy, and a knife slides easily through the center without resistance. If the top browns too quickly before the potatoes are tender, loosely re-cover with foil.

Let the casserole rest for at least 10–15 minutes before serving. This short cooling time allows the creamy sauce to thicken slightly and the layers to settle, so it scoops more neatly and the flavor is fuller.

Because this recipe is intentionally pared down to four core ingredients, any tweaks you make should be small and thoughtful so you keep that same spirit of simplicity. If you’d like to shift the flavor while staying close to the original, you can swap one or both cans of cream of mushroom soup for cream of chicken or cream of celery; all three behave similarly in the oven but each brings a slightly different savory note. For a touch more richness, you can replace up to 1/2 cup of the milk with heavy cream, or use evaporated milk for a subtle, old-fashioned sweetness and extra body. If you prefer a bit of texture on top, uncover the casserole for the last 10 minutes and move it to the top rack so the edges brown more deeply; just keep an eye on it so the potatoes don’t dry out. To get a head start, you can assemble the casserole up to a day in advance, cover it tightly, and refrigerate; add 10–15 minutes to the covered baking time to account for the cold dish. Leftovers reheat well, but the potatoes will continue to soften, so rewarm gently in a 300°F oven, covered, until hot through rather than blasting them at high heat. Finally, if you don’t own a mandoline, use a sharp knife and aim for slices about 1/8 inch thick—consistent thickness matters more than perfect thinness for even, creamy results.