This is a hamburger patty cooked like a steak — seared hard, finished in onion gravy, and served over buttery mashed potatoes. It skips the bun entirely, which means you get more beef and more sauce per bite. If you need to feed a group without standing over a grill flipping buns, this is a smart way to do it.
What makes this version work
Two things matter most here. First, the sear: getting a proper crust on an 80/20 patty requires a dry surface and a hot, heavy pan — cast iron is ideal. If the pan isn’t hot enough before the patty goes in, you get gray steamed beef instead of a browned crust, and that crust is where most of the flavor lives. Second, building the gravy in the same pan after the patties come out isn’t just convenient — the fond left behind from searing is what gives the onion gravy its depth. Skipping that step and making gravy in a clean pan produces something noticeably thinner in flavor. Skip the egg in the mix — it makes the patty mushy and works against the crust you’re trying to build.
Substitutions that actually work
- Yukon Gold potatoes: Russets work but produce a slightly fluffier, drier mash — add a splash more milk to compensate. Avoid waxy red potatoes; they turn gluey when mashed.
- Sour cream: Full-fat plain Greek yogurt is a direct swap and holds up fine in the mash. Low-fat versions can make the texture a little loose.
- Whole milk: Half-and-half makes a richer mash. Skim milk works in a pinch but the result is noticeably less creamy.
- Low-sodium beef broth: Regular broth is fine — just hold off on adding any extra salt to the gravy until you taste it at the end.
- European-style butter: Standard unsalted butter is a perfectly fine substitute. The difference in the finished dish is minor.
Common problems and fixes
- Patties shrink into thick pucks: Press a shallow dimple into the center of each raw patty before it hits the pan. As the beef contracts during cooking, the dimple evens out and you get a flatter, more uniform patty.
- Gravy turns out lumpy: The flour is going into a hot pan with fat — whisk constantly the moment it goes in and don’t walk away. If lumps form anyway, strain the gravy through a fine mesh sieve before serving.
- Mashed potatoes turn gluey: Over-mixing activates the starch and ruins the texture. Mash by hand just until smooth, then stop. A potato ricer gives you more control than an electric mixer.
- Patties stick to the pan: Don’t move them for the first 2–3 minutes. A properly seared patty releases on its own when the crust has formed. Forcing it early tears the crust and the patty.
- Gravy too thin after adding broth: Let it simmer uncovered for an extra 2–3 minutes. It will tighten up. Adding more flour at this stage usually creates lumps — patience is the better fix.
Storage and reheating
Store patties, gravy, and mashed potatoes in separate airtight containers in the fridge for up to 3 days. Keeping them separate prevents the potatoes from soaking up all the gravy overnight. To reheat, warm the gravy in a small saucepan over medium-low heat, adding a splash of beef broth if it has thickened too much. Reheat patties in the gravy for the last few minutes — this keeps them moist. Mashed potatoes reheat well in a covered saucepan over low heat with a tablespoon or two of milk stirred in. The patties can be frozen (without gravy) for up to 2 months; wrap individually and thaw overnight in the fridge before reheating. Frozen mashed potatoes tend to separate and turn watery, so it’s better to make those fresh if you’re planning ahead.
Seared Hamburgers with Creamy Mashed Potatoes
Ingredients
For the Mashed Potatoes:
- 2 pounds Yukon Gold potatoes peeled and cut into 2-inch chunks
- 4 tablespoons unsalted butter preferably European style for richer flavor
- ½ cup whole milk warmed
- ¼ cup sour cream adds tanginess and creaminess
- 1 teaspoon kosher salt
For the Hamburgers and Gravy:
- 1 ½ pounds 80/20 ground beef high-fat content adds juiciness
- 1 teaspoon Worcestershire sauce
- 1 teaspoon garlic powder
- 1 teaspoon black pepper freshly cracked
- ½ teaspoon kosher salt
- 1 tablespoon extra virgin olive oil
- 1 medium yellow onion finely sliced
- 1 cup beef broth low sodium
- 1 tablespoon all-purpose flour
Instructions
- Bring a large pot of salted water to a boil. Add the peeled and chopped Yukon Gold potatoes and boil for about 15–20 minutes until fork-tender and soft at the center. Drain and return to the pot.
- Add the butter, warm milk, sour cream, and salt to the hot potatoes. Mash using a potato masher or ricer until smooth and creamy. Cover and set aside to keep warm.
- Meanwhile, in a large bowl, mix ground beef with Worcestershire sauce, garlic powder, black pepper, and salt until just combined. Divide into 4 equal portions and shape into 1/2-inch thick patties.
- Heat olive oil in a skillet over medium-high heat (about 375°F / 190°C). Sear the patties for 3–4 minutes per side until browned and just cooked through. Remove patties and set aside.
- In the same pan, reduce heat to medium. Add the sliced onions and sauté for 3–5 minutes until caramelized. Sprinkle in flour and stir for 1 minute to form a roux.
- Gradually add beef broth, stirring constantly, and bring to a simmer. Continue cooking until thickened into a rich, glossy gravy, about 3–4 minutes. Return burgers to the pan to reheat briefly in the gravy.
- Plate mashed potatoes alongside a seared hamburger, spoon rich onion gravy over both, and serve hot.
Notes
- For fluffier mashed potatoes, use a potato ricer rather than a traditional masher.
- Swap sour cream for Greek yogurt for a lighter version.
- Add a splash of balsamic vinegar to the caramelizing onions for a deeper tang.
- Prepare patties in advance and chill; this helps maintain shape during searing.
Nutrition
Frequently asked questions
Can I make the patties ahead of time and cook them later?
Yes — form the patties, layer them between sheets of parchment, cover tightly, and refrigerate for up to 24 hours before cooking. Cold patties actually sear better because the surface is drier, which helps the crust form faster. Just make sure ground beef reaches an internal temperature of 160°F (71°C) before serving.
How do I scale this up for a larger group without the gravy running out?
Double the gravy ingredients when you’re cooking for more than four people — it scales easily and people always want more. Cook the patties in batches to avoid crowding the pan, then build one large batch of gravy at the end using all the accumulated fond.
Can I keep the patties warm while I finish the gravy and potatoes?
Set a wire rack on a baking sheet and hold the seared patties in a 200°F (93°C) oven for up to 15 minutes. This is especially useful when cooking in batches for a crowd. Avoid covering them tightly — trapped steam softens the crust.
What to cook next
- Perfect Bacon Double Cheeseburger
- BBQ Cheeseburger Recipe
- Ultimate Avocado Bacon Smash Burger
- NYC Bacon Smash Burger