Thinly sliced russets layered twice with seasoned ground beef and sharp cheddar, with a mushroom-soup sauce poured over the top.
Twenty minutes of assembly, an hour in the oven, and a ten-minute rest. Six servings from one dish.
Why This Recipe Works
- Covered for 45 minutes, then uncovered. The foil traps steam, and steam is what actually cooks raw potato slices through; the uncovered phase is only there to brown the cheese and reduce the sauce.
- The sauce goes over the top rather than being stirred through. Poured on and settled by tapping the dish, it seeps down between the slices — mixed in, it would coat the beef and leave the potatoes dry.
- Half the cheddar is buried and half is added late. The buried cup melts into the layers and binds them; the late cup is the crust.
- A tablespoon of Worcestershire cooked into the beef for a minute, along with the garlic and thyme. That minute off the raw is what stops the finished dish tasting of tinned soup.
- 85/15 beef rather than lean. It is drained after browning, and the fat that stays behind carries the paprika and thyme through the whole layer.
The Dish, Bottom To Top
Steps 4 to 6 build six layers, and almost everything in the recipe is split in half to do it. The sauce goes on last, over the top, rather than being mixed through.
The last cup of cheddar, after 45 minutes
Added when the foil comes off, so it browns for the final 15 to 20 minutes rather than steaming under cover for the whole hour.
The sauce, poured over everything
Condensed mushroom soup whisked with milk, ketchup and paprika, poured evenly over the top and settled by tapping the dish. It works its way down through the layers as it bakes.
The remaining potatoes and butter
A second full layer, repeating the first. This is what makes it a layered casserole rather than a topped one.
Half the beef, then a cup of cheddar
The browned beef mixture spread over the potatoes, then one of the two cups of cheddar. If peas or green beans are going in, they scatter over the beef here.
Half the potatoes, seasoned and dotted
Thin slices in an even layer, a pinch of salt and pepper, and half the butter in small pieces. The butter is dotted rather than melted so it sits where it lands.
Ingredient Notes
- Russet potatoes, thinly sliced
- Three cups, about two large. Russets are floury and their starch helps the layers hold together; a waxy potato stays in separate slices.
- Ground beef, 85/15
- A pound, browned to 160°F and drained. The fat percentage is specified because leaner beef in a layered bake goes dry.
- Condensed cream of mushroom soup
- One 10.5-ounce tin, whisked with milk rather than used neat. Undiluted, it is too thick to travel down between potato slices.
- Sharp cheddar, divided
- Two cups, split exactly in half between the middle layer and the top. Measure both before you start assembling.
- Ketchup or tomato sauce
- A quarter cup, marked optional. It brings acidity and a little sweetness against a very savoury dish.
How to Make It
Heat the oven and grease the dish
Preheat the oven to 375°F (190°C). Grease a 9x13-inch baking dish.
Brown the beef and season it
Heat the oil in a large skillet over medium-high heat. Cook the ground beef and onion until browned; drain. Stir in the garlic, Worcestershire, 1/2 tsp salt, 1/4 tsp pepper and thyme; cook 1 minute.
Whisk the sauce
In a bowl, whisk the condensed mushroom soup, milk, ketchup (or tomato sauce) and paprika until smooth.
First potato layer
Layer half the potato slices in the dish; season with a pinch of salt and pepper. Dot with half the butter.
Beef, cheese and vegetables
Spread half the beef mixture over the potatoes; sprinkle 1 cup cheddar. If using peas or green beans, scatter them over the beef.
Second layer, sauce, and cover
Repeat with the remaining potatoes and butter. Pour the sauce evenly over the top; tap the dish to settle the sauce. Cover tightly with foil.
Bake covered, then top
Bake 45 minutes. Remove the foil; top with the remaining 1 cup cheddar and a pinch of paprika.
Finish uncovered and rest
Bake 15 to 20 minutes more, until the potatoes are tender and the top is bubbly and golden. Rest 10 minutes; garnish with parsley and serve.
Success Tips
- Slice the potatoes to an even thinness — a mandoline is worth it here.
- Take the beef to 160°F on a thermometer rather than judging by colour.
- Cover tightly; a loose foil lets the steam out and the potatoes stay firm.
- Tap the dish after pouring the sauce so it settles between the layers.
- Rest the full ten minutes or the layers will slide apart on the spatula.
Serving Ideas
A one-dish dinner. Something sharp and green alongside cuts through the soup-and-cheddar richness better than bread would.
Storage and Reheating
Refrigerate
Refrigerate up to 4 days, covered. It slices more cleanly cold and reheats well in portions.
Freeze
Freezes for up to 2 months baked and cooled. Potato softens further on thawing but the dish holds together.
Reheat
Covered at 350°F until hot through, uncovering for the last few minutes to bring the top back.
Frequently Asked Questions
My potatoes were still firm.
Either they were sliced too thick or the foil was loose. Thin, even slices and a tightly sealed cover for the first 45 minutes are what cook them; the uncovered phase is only for browning.
Can I make it in a slow cooker?
This recipe is written for a 375°F oven with a covered-then-uncovered bake, and the browning in the final phase is part of the dish. No slow-cooker timing is published here.
Can I use a different condensed soup?
Cream of chicken or cream of celery behave the same way in the dish. The recipe's quantities assume one 10.5-ounce tin whisked with half a cup of milk, whichever you use.
Can I assemble it ahead?
You can, though sliced raw potato discolours. Assemble, cover and refrigerate for a few hours at most, and add roughly ten minutes to the covered bake since it starts cold.
