30-Minute Mongolian Beef (Sweet, Savory & Better Than Takeout)

Mongolian beef is one of those takeout favorites that’s surprisingly easy to make at home, and this version proves it. Thin slices of sirloin get a light cornstarch coating, a quick sear, and a glossy sauce built from ginger, garlic, brown sugar, and tamari or soy sauce. The cornstarch does double duty, giving the beef a tender texture and thickening the sauce right in the pan. The whole dish is ready in about 30 minutes, with a flavor that’s both sweet and deeply savory.

Serve it over rice, rice noodles, or in lettuce wraps, and you’ve got a restaurant-style dinner without the delivery wait.

Ingredients You’ll Need

• 1½ pound 1-inch thick sirloin steak
• ⅓ cup cornstarch
• ¼ cup canola oil
• ¼ teaspoon salt
• 1 tablespoon fresh grated ginger
• 4 tablespoon garlic, minced
• Red pepper flakes or chili oil
• ⅓ cup reduced sodium tamari sauce (for gluten-free), or soy sauce if you prefer
• ½ cup water
• ⅓ cup brown sugar
• 8 stalks scallions, green parts only, cut into 2 inch pieces

How to Make Mongolian Beef

Step 1: Prep the steak.
Cut the steak into thin slices about ¼ inch thick. Lay the slices flat, cover them with plastic wrap, and pound them with a meat mallet until they’re thinner. Transfer the meat to a zip-top bag, add the cornstarch, and massage the bag so every piece is fully coated.

Step 2: Heat the oil.
Pour the canola oil into a large frying pan and heat it over medium-high heat.

Step 3: Sear the beef in batches.
Lay the steak in the pan in a single layer and cook for about 30 seconds per side, so roughly a minute total. Work in batches so the pan doesn’t get crowded. As each batch finishes, move it to a plate and sprinkle it with salt.

Step 4: Build the sauce base.
Add the ginger, garlic, and chili oil or red pepper flakes to the pan and sauté for 10 to 15 seconds, just until fragrant.

Step 5: Add the liquids.
Stir in the tamari or soy sauce, water, and brown sugar, and bring the mixture to a boil.

Step 6: Thicken with the beef.
Return the steak to the pan and let the sauce thicken for 20 to 30 seconds. The cornstarch left on the beef is what thickens it.

Step 7: Finish with scallions.
Turn off the heat, add the scallion pieces, and stir to combine.

Step 8: Serve.
Spoon over white rice or rice noodles, or serve in lettuce wraps for a lighter option.

Recipe Details

• Prep time: 15 minutes
• Cook time: 15 minutes
• Total time: 30 minutes

Tips for the Best Results

• Slice the beef thin and evenly. Thin slices cook in seconds and stay tender.
• Don’t crowd the pan. Cooking in batches gives the beef a better sear.
• Keep the sear short. The beef only needs about a minute total, since it finishes in the sauce.
• Watch the aromatics. Ginger and garlic burn fast, so keep them in the pan for only 10 to 15 seconds.
• Adjust the heat. Add more red pepper flakes or chili oil if you like a spicier sauce.

Storage & Reheating

Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in a skillet over medium heat with a splash of water to loosen the sauce, being careful not to overcook the beef.

Serving Suggestions

• Over steamed white rice for the classic pairing
• With rice noodles for a different texture
• In crisp lettuce cups for a low-carb option
• Alongside steamed broccoli or stir-fried vegetables

Final Thoughts

30-Minute Mongolian Beef gives you the sweet, savory, sticky flavor of your favorite takeout order with a fraction of the wait. Quick to make and easy to adapt, it’s a great recipe to keep on hand for busy nights.