
If you are looking for a dinner that is both satisfying and comes together quickly this Beef Lo Mein has become my weeknight lifesaver. It packs tender beef crisp vegetables and chewy noodles into one hearty skillet with a thick savory sauce. I often turn to this recipe after a busy day when homemade takeout sounds just right.
Since I started making this at home it has become a go to comfort meal for my family The combination of caramelized beef and deeply flavored sauce gets rave reviews every time
Ingredients
- Beef sirloin: sliced very thin this gives tenderness and absorbs marinade easily Look for bright red meat with some marbling
- Soy sauce: for both the marinade and sauce always choose a good quality one for the most flavor
- Cornstarch: works in both the beef marinade and as a thickener for the sauce
- Vegetable oil: neutral and high heat suitable so stir frying goes smoothly
- Lo mein noodles or spaghetti: both work pick a brand with good texture that will not get mushy
- Onion: sliced thin for sweetness and a base layer of flavor Yellow or white onions are both tasty
- Garlic: minced fresh garlic wakes up the entire dish
- Carrots bell peppers broccoli and snow peas: add crunch color and vitamins Buy fresh and crisp veggies for the best result
- Oyster sauce: makes the sauce rich and gives umami If you are vegetarian you can find mushroom based versions
- Sesame oil: just a splash for nutty aroma Make sure to use pure sesame oil not blended
- Beef broth: for richness in the sauce Opt for low sodium if you wish to control salt
- Green onions and sesame seeds: are optional but make a bright and flavorful garnish
- Cornstarch slurry: mixing the cornstarch into water for the final slurry means no lumps will thicken the sauce just right
Instructions
- Marinate the Beef:
- Toss thinly sliced beef with soy sauce and cornstarch in a bowl using your hands to coat each piece completely Let this sit for ten to fifteen minutes so the beef soaks up the flavors and will turn extra tender once cooked
- Cook the Noodles:
- Boil a pot of water and cook lo mein noodles or spaghetti to just al dente following the package Drain quickly and toss with a dash of oil so they will not stick together Leave noodles aside while you continue
- Stir Fry the Beef:
- Heat a tablespoon of vegetable oil in a wide skillet or wok over medium high heat When hot add the marinated beef Spread it in a single layer and let it sear undisturbed for about one minute before stirring Cook just until beef is browned on the outside and barely cooked through then remove beef to a plate to keep it juicy
- Cook the Vegetables:
- Using the same skillet add another spoon of oil Sauté the onion for two minutes until starting to soften Add the garlic carrots peppers broccoli and snow peas Stir fry everything together over medium high heat for about five to seven minutes until veggies are brightly colored and just crisp tender
- Combine and Serve:
- Return the beef and its juices back to the skillet with the vegetables Mix together soy sauce oyster sauce sesame oil and beef broth in a bowl Stir in this sauce let it bubble Add cornstarch slurry and keep stirring as the sauce thickens and turns glossy Quickly toss in the cooked noodles stirring vigorously so every bit gets coated with the savory glaze
- Garnish and Enjoy:
- Chop green onions finely and sprinkle with sesame seeds if you like Serve immediately while everything is piping hot and fragrant

I have always loved how the bell peppers bring a sweet crunch to balance the rich sauce My sister once requested this dish for her birthday dinner because of the way the beef stays tender and never dry
Storage Tips
Transfer cooled leftovers to an airtight container and they will keep for up to three days in the refrigerator For best reheating use a skillet over medium heat or a quick burst in the microwave Add a splash of broth or water to loosen any thickened sauce
Ingredient Substitutions
If you cannot find beef sirloin top round or flank steak also work just slice thin against the grain Substitute lo mein noodles with spaghetti rice noodles or even udon Experiment with veggies such as snap peas mushrooms or baby corn If you do not eat oyster sauce mushroom soy or hoisin sauce can give a similar umami note
Serving Suggestions
Serve straight from the skillet family style or pair with egg rolls and a lightly dressed cucumber salad This noodle dish is filling as a main but can also be part of a larger Asian inspired meal alongside simple steamed dumplings
Cultural and Historical Context
Lo mein is a Cantonese noodle recipe that translates to stirred or tossed noodles Traditionally it features wheat noodles with a savory sauce and a mix of meat and vegetables The dish has evolved in Western kitchens to suit many tastes but it retains its trademark glossy stir fry character
Seasonal Adaptations
Use snap peas and asparagus in spring Choose summer squash and sweet corn for warmer months Swap in thinly sliced mushrooms and shredded cabbage in the winter months

This comforting Beef Lo Mein is ready in no time and makes for easy meals all week. Enjoy every savory bite from first forkful to leftovers.
FAQs about Recipes
- → What cut of beef works best for lo mein?
Beef sirloin or flank steak are ideal, as they're tender and quick to cook when thinly sliced for stir-fries.
- → Can I use other vegetables?
Absolutely! Broccoli, carrots, bell peppers, snow peas, baby corn, or mushrooms work well and add color and texture.
- → What is the key to tender beef in stir-fry?
Thinly slice the beef against the grain and marinate with soy sauce and cornstarch for optimal tenderness.
- → Can I substitute spaghetti for lo mein noodles?
Yes, spaghetti is a suitable alternative to classic lo mein noodles and works well in absorbing sauces.
- → How do I prevent soggy noodles?
Cook noodles just until al dente, drain well, and toss in the skillet only at the end to prevent overcooking.