Pan-Seared Mongolian Beef with Soy-Brown Sugar Glaze
Restaurant-quality Mongolian beef featuring tender flank steak coated in a rich, glossy soy-brown sugar sauce with garlic and ginger. This takeout favorite combines crispy-edged beef with a sweet-savory caramelized glaze that clings beautifully to each piece. Serve over steamed rice for weeknight dinners or casual entertaining. This version builds layers of umami through sesame oil and reduced soy sauce, creating depth beyond standard recipes.
Ingredients
- 1 pound flank steak, sliced
- ¼ cup cornstarch
- 3 tablespoons olive oil, divided
- 2 tablespoons sesame oil, divided
- 3 cloves garlic, pressed or finely minced
- 1 teaspoons fresh ginger, finely minced, or to taste
- ½ cup soy sauce, lite or reduced sodium
- ½ cup water
- ¾ cup dark brown sugar, packed, light may be substituted, or to taste
- 1 green onions sliced into thin rounds, garnish
- sesame seeds
Instructions
- 1
Coat steak slices in cornstarch in a sealed bag and set aside.
- 2
Heat olive oil and sesame oil in a saucepan over medium-high heat. Add garlic and ginger and cook until fragrant, about 1 minute, being careful not to burn.
- 3
Stir in soy sauce, water, and brown sugar until sugar dissolves. Bring to a boil and boil for 2 to 3 minutes, then reduce heat to low and simmer for about 5 minutes until slightly thickened. Taste and adjust seasoning as desired.
- 4
While sauce simmers, heat remaining olive oil and sesame oil in a large skillet over medium-high or high heat. Add cornstarch-coated steak and cook until cooked through, about 5 to 7 minutes, flipping pieces intermittently for even cooking.
- 5
Pour soy sauce mixture over steak, tossing to coat evenly. Simmer at medium-high heat for about 3 minutes, then reduce to low and simmer for 3 to 5 minutes more until sauce reduces and thickens to desired consistency. Stir to coat all pieces.
- 6
Garnish with green onions and sesame seeds if desired. Serve immediately while hot.
Tips
Don't skip reducing the sauce until thickened; this concentrates flavors and creates the signature glossy glaze that makes restaurant versions memorable.
Flipping steak pieces frequently ensures even browning on all sides and prevents overcooking in the center.
Good to Know
Keep airtight in refrigerator for up to 5 days. Reheat gently in a skillet over medium heat or microwave, adding a splash of water if sauce has thickened too much.
Prepare sauce and cornstarch-coated steak up to 4 hours ahead. Cook steak and combine with sauce just before serving for best texture.
Spoon over steamed white or jasmine rice. Pair with stir-fried vegetables like broccoli or snap peas and a simple cucumber salad to balance richness.
Common Mistakes
Burn garlic and ginger by overheating oil; add them only once oil is hot and stir constantly for the first minute.
Skip the sauce reduction step; simmering concentrates flavor and prevents a watery glaze.
Cook steak in batches if skillet is crowded; overcrowding lowers heat and prevents browning.
Substitutions
Gluten-Free Swaps
General Alternatives
FAQ
Can I use a different cut of beef?
Yes. Sirloin, skirt, or even ribeye work well. Thinner cuts cook faster; thicker cuts may need longer. Slice against the grain for tenderness regardless of cut.
What if I prefer less sweetness?
Reduce brown sugar to 1/2 cup or taste the sauce after 5 minutes of simmering and adjust to preference. Soy sauce saltiness balances sweetness, so adjust both if needed.
Can I make this ahead and freeze it?
Yes. Let cool completely, store in an airtight freezer container for up to 2 months. Thaw in the fridge overnight and reheat gently in a skillet, adding water if sauce is too thick.