Beef stroganoff from leftover roast is one of the best second-night dinners there is. Thin strips of tender beef go into a creamy mushroom and sour cream sauce, then get tossed with buttery egg noodles. This version is sized for two, using about 8 ounces of the roast you already have, and it comes together in one skillet and one pot in about 30 minutes. The trick is to treat the beef gently: it is already cooked, so it goes in last and only needs to warm through.
Why you’ll love this leftover stroganoff
- A brand-new dinner from leftovers. Sunday’s roast turns into something that tastes nothing like reheated roast beef.
- Ready in 30 minutes. The beef is already cooked, so the work is a quick mushroom sauce and a pot of noodles.
- Made for two. Two generous plates, with no big pot of stroganoff to finish later.
- Tender, not chewy. Slicing thin and warming the beef over low heat keeps it soft.
- Smooth, creamy sauce. A little flour thickens the broth, and tempered sour cream keeps the sauce silky.
What makes it work with cooked beef
The beef goes in last. Classic stroganoff starts with raw beef that sears quickly. Leftover roast is already cooked through, and every extra minute at a simmer tightens the meat and dries it out. So the sauce is built first, and the beef is warmed in it over low heat for just 3 minutes, until it is hot.
Thin strips across the grain. Cutting the roast across the grain into thin, bite-size strips shortens the muscle fibers, which makes each piece tender to bite. Thick cubes of roast tend to taste dry, even in a creamy sauce.
Browned mushrooms and a thickened broth. Mushrooms give off a lot of liquid. Cooking them over medium-high heat until that liquid is gone and they turn brown adds savory depth and keeps the sauce from turning watery. A couple of teaspoons of flour, stirred in for a minute, then thickens the broth so it clings to the noodles. A teaspoon of Dijon mustard sharpens everything, an idea that came up in reader comments on one of the source recipes.
Tempered sour cream. Sour cream can split if it hits a boiling sauce. Taking the pan off the heat, stirring a spoonful of the hot sauce into the sour cream first, and then stirring it all back in keeps the sauce smooth.
Ingredients for leftover roast beef stroganoff
The exact amounts are in the recipe card below. Here is what matters when you shop and prep.
- Leftover roast beef: any roast works, from a sirloin or eye of round to a chuck roast. Trim off hard fat and gristle, then slice across the grain into thin strips. If your roast was heavily seasoned with strong spices, it may clash with the sauce; a simply seasoned roast is best.
- Baby bella mushrooms: they have more flavor than white button mushrooms and brown nicely. Slice them evenly so they cook at the same rate.
- Low-sodium beef broth: it forms the base of the sauce. Low-sodium lets you control the salt, since leftover roast is often already seasoned. If you have leftover gravy from the roast, a reader of one source recipe used it in place of broth; reduce or skip the flour if you do, since gravy is already thick.
- Sour cream: full-fat sour cream is the most stable in a warm sauce. Let it sit out while you prep so it is not fridge-cold.
- Smoked paprika and Dijon: paprika is the traditional stroganoff spice, and smoked paprika adds a gentle warmth. Dijon adds tang.
- Wide egg noodles: the classic base. Their curls hold the sauce well.
How to make beef stroganoff from leftover roast
- Cook the egg noodles in salted water, saving a little of the cooking water.
- Soften the onion in butter for 5 minutes.
- Brown the mushrooms for 5 minutes, then add the garlic and paprika.
- Stir in the flour for 1 minute, then simmer the broth and Dijon for 3 minutes.
- Warm the beef over low heat for 3 minutes, just until hot.
- Off the heat, stir in the tempered sour cream, toss with the noodles and finish with parsley.
Timing the noodles and the sauce
Put the water on to boil before you start slicing. Egg noodles cook quickly, so the goal is to have them drained right as the sauce is finished. If they are ready early, drain them and toss them with a tiny bit of butter so they do not stick together while you finish the beef.
When the mushrooms are ready, they will look browned at the edges and the pan will be nearly dry. That is the moment to add the garlic and paprika; they only need about 30 seconds before the flour goes in. After the broth simmers, the sauce should lightly coat a spoon. Once the beef is in, keep the heat low. You want small, lazy bubbles at most, never a rolling boil. When the beef is hot, it is ready for the sour cream.
Tips for the creamiest stroganoff
- Slice the beef cold. Chilled roast is firmer and much easier to cut into thin, even strips.
- Give the mushrooms room. A 10-inch skillet lets them sit in a single layer so they brown rather than steam.
- Scrape the pan. When the broth goes in, loosen the browned bits from the bottom of the skillet; they flavor the sauce.
- Add the sour cream off the heat. Tempering it with a spoonful of hot sauce first keeps it from splitting.
- Adjust with noodle water. If the sauce gets too thick after tossing, a splash of the starchy cooking water loosens it without thinning the flavor.
Substitutions and variations
Leftover steak, pot roast or prime rib: all work the same way. Trim the fat, slice thin across the grain and warm gently. Tender pot roast may fall into shreds, which is perfectly fine in the sauce.
No leftovers? You can sear a small steak, rest it, slice it thin and use it the same way; one source recipe suggests exactly this.
Noodles: pappardelle or fettuccine make a good swap, and stroganoff is also lovely over rice or mashed potatoes.
Sour cream: crème fraîche is richer and less likely to split. Plain Greek yogurt adds more tang but splits more easily, so keep the heat off when you stir it in.
Dijon: leave it out for a milder sauce.
What to serve with beef stroganoff
Stroganoff is rich, so pair it with something green and fresh. Steamed green beans, roasted broccoli or sautéed spinach or kale all work. A crisp salad with a sharp vinaigrette balances the creamy sauce, and a slice of crusty bread is good for wiping the plate clean. It is the kind of cozy, unfussy dinner that is nice to share at the table on a cold weeknight, with a little extra parsley scattered over the top.
Storing and reheating
Because this dish is made from leftovers, food-safety timing matters more than usual. Start with roast beef that was refrigerated within 2 hours of cooking and is no more than 3 to 4 days old, which follows USDA guidance for cooked leftovers.
If you have any stroganoff left, refrigerate it within 2 hours and eat it within 1 day, so the total time since the roast was cooked stays within that 3 to 4 day window. Reheat it gently over low heat with a splash of water, stirring, until it reaches 165°F. The sour cream sauce does not freeze well; it tends to separate and turn grainy when thawed.
A leftover roast is a head start, and this creamy skillet stroganoff makes the most of it. Two plates of noodles, a tender, savory sauce and a dinner that feels brand new, with almost no effort.
Frequently asked questions
What if you don’t have any leftover roast beef?
Sear a small steak, let it rest, then slice it thin across the grain and add it at the same point as the roast. Leftover steak or prime rib also work.
How do I keep the sour cream from curdling?
Use room-temperature sour cream, take the pan off the heat, and stir a spoonful of the hot sauce into the sour cream before adding it. Do not let the sauce boil afterward.
Can I freeze stroganoff made with sour cream?
It is not a good candidate for freezing, because the sour cream sauce separates when thawed. Make it fresh and enjoy any leftovers within a day.
How long does leftover roast beef keep?
Cooked roast beef keeps 3 to 4 days in the refrigerator if it was chilled within 2 hours of cooking, according to USDA guidance. Use it within that window for this recipe.
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Leftover Roast Beef Stroganoff for Two
- Total Time: 30 minutes
- Yield: 2 servings
Description
Thin strips of leftover roast beef in a creamy mushroom and sour cream sauce over egg noodles, made in one skillet for two in about 30 minutes.
Ingredients
- 6 ounces wide egg noodles
- 2 tablespoons butter, divided
- 1 small onion, thinly sliced
- 6 ounces baby bella mushrooms, sliced
- 1 clove garlic, minced
- 1/2 teaspoon smoked paprika
- 2 teaspoons all-purpose flour
- 3/4 cup low-sodium beef broth
- 1 teaspoon Dijon mustard
- 8 ounces leftover roast beef, sliced into thin bite-size strips
- 1/3 cup sour cream, at room temperature
- 1/4 teaspoon salt, plus more to taste
- 1/4 teaspoon black pepper
- 1 tablespoon chopped fresh parsley
Instructions
- Bring a medium pot of salted water to a boil and cook the noodles according to the package until just tender. Scoop out a little of the cooking water, then drain.
- Meanwhile, melt 1 tablespoon of the butter in a 10-inch skillet over medium heat. Add the onion and cook, stirring often, for 5 minutes, until soft and lightly golden.
- Add the remaining butter and the mushrooms, raise the heat to medium-high and cook for 5 minutes, until the mushrooms are browned and their liquid has cooked off. Stir in the garlic and paprika and cook until fragrant, about 30 seconds.
- Sprinkle in the flour and stir for 1 minute. Stir in the broth and Dijon, scraping the bottom of the pan, and simmer for 3 minutes, until lightly thickened.
- Reduce the heat to low, add the beef and any juices, and warm for 3 minutes, stirring, just until the beef is hot (165°F); do not let it boil.
- Take the skillet off the heat. Stir a spoonful of the hot sauce into the sour cream in a small bowl, then stir the sour cream into the skillet. Season with the salt and pepper, add the noodles and toss, loosening with a splash of the cooking water if needed. Sprinkle with parsley and serve.
Notes
Equipment: 10-inch skillet, medium pot, colander, small bowl, wooden spoon, instant-read thermometer
- Slice the beef across the grain into thin strips so it stays tender; thick chunks of roast can taste dry.
- Keep the heat low once the beef goes in: it is already cooked and only needs to warm through.
- Room-temperature sour cream, tempered with a little hot sauce, is less likely to split.
- Leftover steak, pot roast or prime rib work the same way; trim off any hard fat first.
- Refrigerate leftovers within 2 hours and eat within 1 day; the roast beef was already a leftover, so keep the total time since the roast was cooked within 3 to 4 days.
- The sour cream sauce does not freeze well. Reheat gently over low heat with a splash of water until it reaches 165°F.
- Use roast beef that was refrigerated within 2 hours of cooking and is no more than 3 to 4 days old (USDA FSIS).
- Reheat leftovers to 165°F (USDA FSIS).
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Category: Dinner
- Method: Stovetop
- Cuisine: American
