Creamy Mushroom Beef Bake (sometimes called “Hamburger Steak Bake” or “No-Peek Beef Casserole”). This is indeed the ultimate low-effort, high-reward supper. The magic is that the beef and soup create their own rich, savory gravy as they bake.
Here’s how to put it together, keeping to your request for simplicity and that “one ev” (one-pan wonder) spirit.
The Core 4-Ingredient Bake
This is the stripped-back, perfect version that works every time.
Ingredients:
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1 ½ lbs ground beef
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1 can (10.5 oz) cream of mushroom soup (don’t dilute it)
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1 packet (1 oz) dry onion soup mix (this is your secret weapon, seasoning the meat and gravy at once)
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1 ½ cups shredded cheddar cheese, divided
Method:
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Prep: Preheat oven to 375°F (190°C). In a bowl, combine the ground beef, dry onion soup mix, and ½ cup of the cheddar cheese. Mix gently, just until combined—overworking makes the patties tough.
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Form & Arrange: Shape the mixture into 4-6 oval patties (about ¾-inch thick). Place them in a single layer in a glass 9×13-inch baking dish. No need to grease it; the beef will render a little fat.
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Smother: Spoon the undiluted cream of mushroom soup directly over the raw patties, spreading it evenly to completely cover them. This blanket of soup steams the patties tender and bastes them as they cook.
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Bake (The “No-Peek” Part): Cover the dish tightly with foil and bake for 45 minutes. The key is not to peek; the trapped steam does all the work.
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Melt & Serve: Remove the foil and sprinkle the remaining 1 cup of cheddar cheese over the top. Bake, uncovered, for another 10-15 minutes, until the cheese is melted, bubbly, and the sauce has thickened slightly around the edges. The internal temperature of the patties should reach 160°F (71°C).
Serving the “One Ev” Hearty Supper
This dish creates its own luscious mushroom gravy. It’s crying out to be served over something to soak it all up:
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Creamy Mashed Potatoes: The classic bed.
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Buttered Egg Noodles: A close second.
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Steamed Rice: Perfect for a no-fuss side.
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Puff Pastry Shells: And here’s where it gets brilliant. To tie it back to your first request, serve the saucy beef patty and gravy inside a large, pre-baked puff pastry shell (vol-au-vent). The flaky pastry with the creamy beef is a showstopper that’s still so simple. Just bake the empty shells while the beef rests.
A Tangy Variation (Swap One Ingredient)
For a totally different but equally loved flavor profile, swap the cream of mushroom for a can of cream of celery and the dry onion soup mix for 2 tablespoons of Worcestershire sauce + 1 tsp garlic powder. You’ll get a beefier, umami-packed gravy that reminds you of a classic Salisbury steak.
This is the epitome of a set-it-and-forget-it dinner that tastes like you simmered a gravy all day. Let me know if you try it—it’s pure nostalgic comfort.