Mongolian Beef delivers glossy, savory-sweet sauce over tender beef in under 30 minutes. This homemade version beats takeout with better ingredients and a perfect sear. You’ll love this easy Mongolian Beef for a quick, restaurant-quality weeknight meal.
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Why You’ll Love This Mongolian Beef
- Faster than takeout: Ready in about 30 minutes with no delivery wait.
- Addictive sauce: Perfect balance of salty soy, sweet brown sugar, and a hint of heat.
- Perfect texture: Velveting the beef ensures a tender bite with a crisp exterior.
- Versatile serving: Great over rice, noodles, or with steamed veggies.
Ingredients & Tools
- 1 lb flank steak or sirloin, thinly sliced against the grain
- 1/4 cup cornstarch
- 1/3 cup low-sodium soy sauce
- 1/3 cup light brown sugar, packed
- 1/2 cup water or beef broth
- 2 tsp fresh ginger, grated
- 4 garlic cloves, minced
- 1/2 tsp red pepper flakes (adjust to taste)
- 1 bunch green onions, cut into 1-inch pieces
- 3 tbsp vegetable or canola oil, for frying
- 1 tsp toasted sesame oil (for finishing)
Tools: A large skillet or wok, a medium mixing bowl, a small bowl for the sauce, and a set of tongs.
Notes: Quality soy sauce and fresh ginger/garlic make a difference. Slice beef against the grain for tenderness.
Nutrition (per serving)
| Calories: | 380 kcal |
| Protein: | 25 g |
| Fat: | 16 g |
| Carbs: | 32 g |
| Fiber: | 1 g |
Serves: 4 | Prep Time: 15 minutes | Cook Time: 12 minutes | Total Time: 27 minutes
Before You Start: Tips & Ingredient Notes
- Slice your beef when it’s partially frozen. This is the single best trick for getting paper-thin, even slices. Pop the steak in the freezer for about 20-30 minutes before you plan to cut it.
- Don’t skip the cornstarch coating. This step, often called “velveting,” is what gives the beef its signature tender texture and helps the sauce cling beautifully later on.
- Use low-sodium soy sauce. Because we’re reducing the sauce, the salt can concentrate. Starting with a low-sodium base gives you more control over the final flavor.
- Have all your ingredients prepped and ready. This is a fast-paced dish once you start cooking. Having your sauce mixed, aromatics minced, and green onions cut makes the process smooth and stress-free.
How to Make Mongolian Beef
Step 1: Begin by preparing your beef. Slice the flank steak as thinly as you can against the grain—this is crucial for tenderness. Place the slices in a medium bowl and toss them thoroughly with the 1/4 cup of cornstarch until every piece is lightly and evenly coated. You’ll notice it looks a little dusty and pale; that’s exactly what you want. Set this aside while you make the sauce.
Step 2: Now, let’s whip up that incredible sauce. In a separate small bowl, whisk together the low-sodium soy sauce, packed brown sugar, and your 1/2 cup of water or beef broth. Whisk it until the sugar has mostly dissolved. Then, stir in the grated ginger, minced garlic, and red pepper flakes. Giving it a good whisk now means a perfectly unified sauce later, with no clumps of sugar or ginger.
Step 3: Time to cook the beef. Heat the 3 tablespoons of vegetable oil in a large skillet or wok over medium-high heat. You’ll know the oil is ready when a small piece of beef sizzles immediately upon contact. Working in two batches to avoid crowding the pan, add the cornstarch-dusted beef slices in a single layer. Let them sear for about 60-90 seconds per side until they’re browned and crisped at the edges. Remove them to a clean plate. Don’t worry if they’re not cooked all the way through—they’ll finish in the sauce.
Step 4: Carefully pour the excess oil out of the skillet, leaving just about a teaspoon behind. Reduce the heat to medium and pour your pre-mixed sauce directly into the hot pan. It will bubble and simmer immediately. Let it cook for 2-3 minutes, stirring occasionally, until it thickens slightly and becomes glossy. You should be able to drag a spatula through it and see the bottom of the pan for a second before the sauce flows back.
Step 5: Add the cooked beef and any accumulated juices back into the skillet with the thickened sauce. Toss everything together to coat the beef evenly, letting it heat through for another minute. The sauce will cling to every nook and cranny. Finally, turn off the heat and stir in the green onions and that teaspoon of toasted sesame oil. The residual heat will wilt the onions just enough while keeping their fresh, crisp bite.
Storage & Freshness Guide
- Fridge: Store in an airtight container for up to 3 days.
- Freezer: Freeze for up to 1 month; thaw overnight in fridge before reheating.
- Reviving: Reheat gently in a skillet with a splash of water or broth to refresh sauce.
Serving Suggestions
Complementary Dishes
- Steamed Jasmine Rice — The fluffy, slightly sticky grains are the perfect canvas for soaking up every last drop of that glorious sauce.
- Simple Stir-Fried Bok Choy — A quick garlic sauté adds a fresh, green, and slightly bitter contrast that cuts through the richness of the beef beautifully.
- Crispy Vegetable Spring Rolls — They add a wonderful textural contrast and make the whole meal feel like a true restaurant-style feast.
Drinks
- Jasmine Green Tea — Its floral, slightly sweet notes cleanse the palate between bites and complement the savory-sweet profile of the dish.
- A Light Lager or Pilsner — The crisp, carbonated finish of a cold beer is fantastic for cutting through the sticky sauce and refreshing your taste buds.
- Ginger Beer (non-alcoholic) — The spicy-sweet kick of ginger beer mirrors the ginger in the sauce, creating a really harmonious pairing.
Something Sweet
- Lychee Sorbet — This light, floral, and refreshing dessert is the perfect, palate-cleansing endnote to a rich and savory meal.
- Fortune Cookies and Orange Slices — A classic, simple finish that’s fun, light, and doesn’t require any extra baking or prep.
- Mango Sticky Rice — If you’re feeling indulgent, the sweet, creamy coconut and fresh mango are a tropical dream alongside the bold beef.
Top Mistakes to Avoid
- Mistake: Crowding the pan when browning the beef. If you add all the beef at once, the pan temperature drops drastically and the beef will steam instead of sear. You’ll end up with a gray, chewy result instead of crispy, tender pieces. I’ve messed this up before too, and it’s a lesson you only need to learn once!
- Mistake: Letting the sauce reduce for too long. The sauce will continue to thicken as it cools, especially with the cornstarch from the beef. If you reduce it to a syrupy consistency in the pan, it can become unpleasantly thick and sticky on the plate.
- Mistake: Adding the green onions too early. If you cook them for more than a minute, they lose their vibrant color and crisp texture, becoming soft and limp. Tossing them in at the very end preserves their fresh flavor and appealing crunch.
- Mistake: Skipping the toasting of the sesame oil. Regular sesame oil doesn’t have the same deep, nutty aroma. Using toasted sesame oil for finishing adds a final layer of complex flavor that makes the dish taste truly authentic.
Expert Tips
- Tip: Double the sauce if you’re a sauce lover. Simply double all the sauce ingredients (soy, brown sugar, water, aromatics). This is a pro-move for anyone who loves extra sauce for their rice. It doesn’t make the dish soupy, just more luxurious.
- Tip: Add a splash of rice vinegar at the end. About half a teaspoon stirred in with the green onions can add a subtle brightness that lifts the entire dish and keeps it from feeling too heavy.
- Tip: For an extra crispy crust, let the coated beef sit. After tossing the beef in cornstarch, let it sit on a wire rack for 5-10 minutes. This allows the cornstarch to adhere better and can result in an even crispier exterior when fried.
- Tip: Use a mix of oils for frying. Try using two tablespoons of a neutral oil with one tablespoon of sesame oil for frying the beef. It infuses a subtle nutty flavor right into the meat from the very beginning.
FAQs
Can I make Mongolian Beef with chicken or tofu instead?
Absolutely! For chicken, use thin slices of chicken breast and follow the same cornstarch-dusting method. For tofu, use extra-firm tofu, press it well to remove water, cut it into cubes, and coat it in cornstarch before pan-frying until golden. The cooking process and sauce remain exactly the same. It’s a wonderfully adaptable recipe.
How do I store and reheat leftovers?
Store any leftovers in an airtight container in the refrigerator for up to 3 days. The best way to reheat is in a skillet over medium heat with a tiny splash of water or broth. This helps loosen the sauce without making the beef rubbery. Microwaving can make the beef tough and the sauce separate.
Is this recipe gluten-free?
It can be! Simply ensure you use a certified gluten-free soy sauce (like tamari) and double-check that your brown sugar doesn’t contain any anti-caking agents that might have gluten. All other ingredients are naturally gluten-free.
My sauce didn’t thicken. What happened?
This usually happens if the cornstarch from the beef wasn’t enough or if the sauce wasn’t simmered for long enough. If your sauce is too thin, mix one teaspoon of cornstarch with one tablespoon of cold water to create a “slurry,” then stir it into the simmering sauce. It should thicken up within a minute.
Can I make this dish spicier?
Of course! You have a few great options. Increase the red pepper flakes to a full teaspoon, add a diced fresh chili (like a serrano or Thai bird’s eye) when you cook the garlic and ginger, or finish the dish with a drizzle of chili crisp or sriracha right before serving for both heat and texture.
Mongolian Beef
Make better-than-takeout Mongolian Beef in 30 minutes! Tender beef in a savory-sweet sauce. Get the easy, foolproof recipe now.
Ingredients
For the Ingredients
-
1 lb flank steak or sirloin (thinly sliced against the grain)
-
1/4 cup cornstarch
-
1/3 cup low-sodium soy sauce
-
1/3 cup light brown sugar (packed)
-
1/2 cup water or beef broth
-
2 tsp fresh ginger (grated)
-
4 cloves garlic (minced)
-
1/2 tsp red pepper flakes (adjust to taste)
-
1 bunch green onions (cut into 1-inch pieces)
-
3 tbsp vegetable or canola oil (for frying)
-
1 tsp toasted sesame oil (for finishing)
Instructions
-
Begin by preparing your beef. Slice the flank steak as thinly as you can against the grain—this is crucial for tenderness. Place the slices in a medium bowl and toss them thoroughly with the 1/4 cup of cornstarch until every piece is lightly and evenly coated. You’ll notice it looks a little dusty and pale; that’s exactly what you want. Set this aside while you make the sauce.01
-
Now, let’s whip up that incredible sauce. In a separate small bowl, whisk together the low-sodium soy sauce, packed brown sugar, and your 1/2 cup of water or beef broth. Whisk it until the sugar has mostly dissolved. Then, stir in the grated ginger, minced garlic, and red pepper flakes. Giving it a good whisk now means a perfectly unified sauce later, with no clumps of sugar or ginger.02
-
Time to cook the beef. Heat the 3 tablespoons of vegetable oil in a large skillet or wok over medium-high heat. You’ll know the oil is ready when a small piece of beef sizzles immediately upon contact. Working in two batches to avoid crowding the pan, add the cornstarch-dusted beef slices in a single layer. Let them sear for about 60-90 seconds per side until they’re browned and crisped at the edges. Remove them to a clean plate. Don’t worry if they’re not cooked all the way through—they’ll finish in the sauce.03
-
Carefully pour the excess oil out of the skillet, leaving just about a teaspoon behind. Reduce the heat to medium and pour your pre-mixed sauce directly into the hot pan. It will bubble and simmer immediately. Let it cook for 2-3 minutes, stirring occasionally, until it thickens slightly and becomes glossy. You should be able to drag a spatula through it and see the bottom of the pan for a second before the sauce flows back.04
-
Add the cooked beef and any accumulated juices back into the skillet with the thickened sauce. Toss everything together to coat the beef evenly, letting it heat through for another minute. The sauce will cling to every nook and cranny. Finally, turn off the heat and stir in the green onions and that teaspoon of toasted sesame oil. The residual heat will wilt the onions just enough while keeping their fresh, crisp bite.05
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