This super easy Mongolian beef recipe delivers tender, thinly sliced flank steak coated in a lightly crisp cornstarch crust and covered with a glossy brown sugar, soy, garlic, and ginger sauce. It takes about 15 minutes to prepare and 15 minutes to cook, making a deeply savory-sweet dinner in approximately 30 minutes.
Serve the beef over steamed white rice with broccoli, sesame seeds, and extra green onions for a complete meal that tastes like your favorite Chinese-American takeout. The sauce is rich without being complicated, while the quick batch-frying method keeps the beef browned instead of soggy.
Jump to RecipeWhy You’ll Love This Recipe
Mongolian beef is one of those dinners that looks impressive on the plate but uses straightforward ingredients and a very manageable cooking process. The combination of caramel-like brown sugar, salty low-sodium soy sauce, fresh ginger, and garlic creates a sauce with enough richness to coat every strip of beef.
The texture is the real reason this recipe stands out. Cornstarch gives the flank steak a delicate coating that browns quickly in hot oil, and the beef is finished in the sauce only long enough to become glossy rather than soft and heavy.
Because the beef cooks in small batches, each piece gets direct contact with the hot pan. That short cooking time also helps keep flank steak tender, provided it has been sliced thinly against the grain.
If you are planning a comforting dinner menu, you can pair this stir-fry with another family-style favorite such as this easy turkey casserole on a different night. Both recipes are practical choices when you want a satisfying homemade meal without a long list of difficult steps.
Ingredients You’ll Need
The ingredient list is short, but every item has a specific job. Flank steak provides a beefy flavor, while cornstarch helps form the lightly crisp surface that catches the sauce.
- Flank steak: Choose a fairly even piece and trim away any thick surface fat or silverskin. Slice it after partially freezing for 20–30 minutes, which makes very thin cuts much easier.
- Cornstarch: This is the dry coating for the beef. Give the slices a thorough toss, then allow them to rest for about 10 minutes so the coating sticks.
- Vegetable oil: Use the full 1/4 cup for frying in a large skillet or wok. The oil should be hot before the beef goes in.
- Sauce ingredients: Low-sodium soy sauce, water, packed brown sugar, minced ginger, minced garlic, and optional red pepper flakes create the sweet-savory base.
- Green onions: Stir these in at the end so they remain fresh, fragrant, and pleasantly crisp.
For serving, prepare steamed white rice at the same time as the beef. Steamed broccoli, sesame seeds, and extra sliced green onions are simple additions that bring color and balance to the rich sauce.
For another cozy dinner idea when you are feeding a crowd, keep our cheesy tater tot casserole in your meal-planning rotation.
How to Make It Step-by-Step
Step 1: Partially freeze the flank steak for 20–30 minutes if it is soft or difficult to cut. Slice it very thinly against the grain, looking for the long muscle fibers and cutting across them rather than parallel to them.
Step 2: Put all of the sliced beef in a bowl and sprinkle in the cornstarch. Toss thoroughly with clean hands or tongs until each slice has a light, even coating, then let the beef stand for about 10 minutes so the cornstarch adheres.
Step 3: While the beef rests, combine the low-sodium soy sauce, water, packed brown sugar, freshly minced ginger, minced garlic, and optional red pepper flakes in a small saucepan. Stir over medium heat and bring the mixture to a simmer.
Step 4: Cook the sauce for about 4–5 minutes, stirring occasionally, until the brown sugar has dissolved and the mixture is slightly thickened. Keep it warm while you fry the beef, but do not worry if it is not very thick yet because it will cling more as it cools.
Step 5: Heat the vegetable oil in a large skillet or wok over medium-high to high heat. Test the pan with a small piece of coated beef; it should sizzle as soon as it touches the oil.
Step 6: Fry the beef in small batches for approximately 1–2 minutes per side, turning once, until the coating is browned and the meat is just cooked through. Avoid crowding the pan because too much beef at once lowers the temperature and causes the coating to steam.
Step 7: Transfer each cooked batch to a plate or rack while you finish the remaining beef. If there is a large amount of oil left in the skillet, drain the excess carefully before returning all of the beef to the pan.
Step 8: Pour the warm sauce over the beef and toss for 1–2 minutes. Stop cooking when the meat looks glossy and the sauce clings to the slices; waiting for the sauce to become very thick in the pan can make the coating too soft.
Step 9: Stir in the sliced green onions just before serving. Spoon the Mongolian beef over steamed white rice and add steamed broccoli, sesame seeds, or extra green onions if desired.
Chef’s Tips for Tender, Glossy Beef
The most important preparation detail is the direction of your knife. Flank steak has visible fibers, and cutting across those fibers shortens them so each bite feels tender rather than stringy.
Thin slices also cook quickly, so have the beef, oil, sauce, and serving rice ready before you begin frying. This is a fast recipe once the pan is hot, and the meat can overcook if left unattended.
Batch-frying is worth the extra few minutes. A crowded skillet traps moisture, lowers the heat, and prevents the cornstarch from developing the lightly browned texture that makes this dish so appealing.
Keep the sauce at a gentle simmer rather than boiling it aggressively. The goal is to dissolve the sugar and bring the flavors together while leaving enough fluidity for the sauce to spread across every piece of beef.
For a dinner spread with more homemade comfort food, try serving this dish on one night and our Mexican chicken tortilla soup on another. Both recipes offer bold flavor while relying on familiar grocery-store ingredients.
What to Serve with Mongolian Beef
Steamed white rice is the classic partner because it absorbs the extra sauce and softens the sweet-salty flavor in each bite. Spoon the beef and sauce over the rice just before eating so the rice stays fluffy beneath the topping.
Steamed broccoli adds a fresh, lightly bitter contrast to the sweet sauce. You can also place the broccoli beside the beef rather than mixing it into the skillet, which preserves the browned texture of the meat.
For finishing touches, scatter sesame seeds and extra sliced green onions over the top. The green onions bring a crisp, fresh note, while sesame seeds add a subtle nutty flavor and attractive color.
If you are building a collection of easy make-ahead dinners, our slow cooker meatballs are another useful option for busy evenings and casual entertaining.
Storage and Reheating
For the best texture, serve Mongolian beef immediately after it has been tossed with the sauce. If you have leftovers, let them cool, place them in an airtight container, and refrigerate them promptly.
Reheat the beef gently in a skillet over medium heat with a small splash of water. Stir occasionally until warmed through, taking care not to cook it for too long because repeated high heat can make the flank steak firm.
Store rice separately when possible so it does not absorb all of the sauce during refrigeration. Add fresh green onions after reheating for a brighter finish.
When you want a different beef dinner with a roasting approach, you can also browse this air fryer roast beef recipe for another flavorful option.
Super Easy Mongolian Beef Recipe (Better Than Takeout!)
Ingredients
Method
- Partially freeze the flank steak for 20–30 minutes if needed, then slice it very thinly against the grain.
- Place the sliced beef in a bowl and toss thoroughly with the cornstarch. Let it stand for about 10 minutes so the coating adheres.
- Combine the soy sauce, water, brown sugar, ginger, garlic, and optional red pepper flakes in a small saucepan. Bring to a simmer over medium heat and cook for 4–5 minutes, stirring until the sugar dissolves and the sauce is slightly thickened.
- Heat the vegetable oil in a large skillet or wok over medium-high to high heat. Fry the beef in batches for approximately 1–2 minutes per side, until browned and just cooked through.
- Drain excess oil if necessary, return all the beef to the pan, and pour in the sauce. Toss for 1–2 minutes until glossy and evenly coated, then stir in the green onions and serve immediately.
15 mins
30 mins
4 servings
Not calculated