Authentic Mongolian Beef Recipe — Easy & Delicious
Mongolian Beef is one of those dishes that feels indulgent, bold, and deeply satisfying — yet it comes together in under 30 minutes. With tender strips of beef coated in a glossy, sweet-savory sauce and served over fluffy steamed rice, this dish has earned its place as a favourite in Asian-inspired home cooking. Despite its name, Mongolian Beef as we know it today was actually popularised in Chinese-American restaurants, but its rich umami-forward flavour profile draws on authentic East Asian culinary traditions. Let's make it from scratch.
What Makes a Great Mongolian Beef?
The secret to an outstanding Mongolian Beef lies in three things: the right cut of beef, a perfectly balanced sauce, and high-heat cooking. Each element plays a crucial role in achieving that restaurant-quality result at home.
Choosing the Right Beef
Flank steak is the classic choice for Mongolian Beef. It is lean, flavourful, and slices beautifully against the grain into thin strips that cook quickly and remain tender. Sirloin is an excellent alternative if flank steak is unavailable. For a premium dining experience at home, sourcing quality beef makes all the difference — Block House is known for its exceptional meat quality, making it a great reference point for what well-selected beef should look and feel like when you're shopping.
The Sauce
The sauce is the heart of this recipe. It is a deeply savoury blend of dark soy sauce, brown sugar, garlic, ginger, and a touch of hoisin — balanced to hit all the right notes: sweet, salty, umami-rich, and just slightly smoky. The cornstarch not only tenderises the meat but also thickens the sauce beautifully during cooking.
Ingredients
- 500g flank steak, thinly sliced against the grain
- 3 tablespoons cornstarch
- 3 tablespoons dark soy sauce
- 2 tablespoons light soy sauce
- 3 tablespoons brown sugar
- 4 garlic cloves, minced
- 1 teaspoon fresh ginger, grated
- 1 tablespoon hoisin sauce
- 120ml water
- 3 tablespoons vegetable oil
- 3–4 spring onions, sliced into 5cm pieces
- 1 teaspoon sesame oil
- Dried red chili flakes (optional, for heat)
- Steamed jasmine rice, to serve
Step-by-Step Instructions
Step 1 — Prepare and Tenderise the Beef
Place your sliced beef strips in a large bowl and toss them thoroughly with the cornstarch until every piece is evenly coated. This simple step does two important things: it tenderises the meat and creates a light coating that helps the sauce cling to each strip. Allow the coated beef to rest for about 10–15 minutes at room temperature while you prepare the sauce.
Step 2 — Make the Mongolian Sauce
In a small bowl, whisk together the dark soy sauce, light soy sauce, hoisin sauce, brown sugar, water, minced garlic, and grated ginger. Stir until the sugar is fully dissolved. Taste and adjust — if you prefer a sweeter profile, add a touch more brown sugar; for more depth, a dash of sesame oil works wonders.
Step 3 — Sear the Beef
Heat a large wok or heavy-bottomed frying pan over the highest heat your stove allows. Add the vegetable oil and let it get shimmering hot. Working in batches to avoid overcrowding, add the beef strips in a single layer. Sear for 1–2 minutes per side without moving them — you want caramelised, slightly crispy edges. Remove each batch and set aside.
Step 4 — Build the Dish
In the same pan, pour in the sauce mixture. Let it bubble and reduce for 2–3 minutes until it thickens and turns glossy. Return all the seared beef to the pan, toss well to coat every strip in the sauce, and add the spring onion pieces. Cook for a final 1–2 minutes until the spring onions are just tender but still vibrant green. Finish with a drizzle of sesame oil.
Step 5 — Serve
Serve immediately over steamed jasmine rice. Garnish with extra spring onions, a sprinkle of sesame seeds, and chili flakes if you enjoy a little heat. This dish is best eaten fresh and hot.
Tips for the Best Mongolian Beef
- Freeze the beef briefly: Place the flank steak in the freezer for 20–30 minutes before slicing — this firms it up and makes thin, even cuts much easier.
- Always slice against the grain: This shortens the muscle fibres and is the key to melt-in-your-mouth tenderness.
- Use high heat: A ripping hot wok is non-negotiable. It gives you the characteristic wok hei — that slightly smoky, charred flavour that defines great Asian stir-fry cooking.
- Don't crowd the pan: Cook in batches. Overcrowding drops the temperature and steams rather than sears the meat.
- Balance the sauce: Dark soy sauce provides colour and depth; light soy adds saltiness. Use both for the most rounded flavour.
Variations and Substitutions
This recipe is wonderfully adaptable. Here are a few ways to make it your own:
- Add vegetables: Sliced bell peppers, broccoli florets, or julienned carrots work beautifully. Add them after searing the beef and before adding the sauce.
- Make it spicy: Stir in a teaspoon of sambal oelek or a few dried bird's eye chilies for serious heat.
- Gluten-free version: Substitute tamari for both soy sauces and use a gluten-free hoisin alternative.
- Serve differently: Mongolian Beef also works wonderfully as a filling for steamed bao buns or alongside noodles instead of rice.
Frequently Asked Questions
Can I make this ahead of time?
The sauce can be prepared up to two days in advance and stored in the refrigerator. The beef is best cooked fresh for optimal texture, though leftovers reheat well in a hot pan with a splash of water to loosen the sauce.
What is the best rice to serve with Mongolian Beef?
Jasmine rice is the classic pairing — its subtle floral aroma and fluffy texture complement the bold sauce perfectly. Steamed basmati is a great alternative.
Is Mongolian Beef actually from Mongolia?
Despite the name, the dish is not traditional Mongolian cuisine. It was created and popularised in Chinese-American restaurants, drawing on the Taiwanese restaurant tradition of iron-plate cooking. The name refers more to the style — bold, hearty, and meat-forward — than to geographic origin.
Final Thoughts
Mongolian Beef is one of those recipes that consistently impresses without requiring hours in the kitchen. Once you've made it yourself, you'll wonder why you ever ordered takeout. The key is quality ingredients, high heat, and a well-balanced sauce — and with this recipe, you have everything you need to get it exactly right every time.
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