Easy Beef Pepper Steak Stir Fry with Flank Steak
This beef pepper steak stir fry features tender velveted beef and crisp bell peppers in a savory ginger-soy sauce. A 25-minute meal that rivals any takeout favorite.
This beef pepper steak stir fry is the ultimate solution for a high-heat, high-flavor dinner that hits the table faster than a delivery driver can find your house. By using the Chinese restaurant technique of velveting the meat with cornstarch and soy sauce, we ensure the flank steak stays incredibly tender even after a hard sear in a ripping hot wok.
Unlike a soggy, one-dimensional vegetable medley, this quick beef and peppers stir fry relies on contrast. You get the crunch of vibrant bell peppers, the bite of aromatics like ginger and garlic, and a glossy oyster-soy sauce that clings to every strip of protein. It is a quintessential Chinese pepper steak recipe refined for the home cook who wants bold wok hei flavor without the specialized equipment.
The key is preparation. Stir fry is a fast-paced game; once the pan is hot, you won't have time to chop. Get your sauce whisked and your vegetables sliced into uniform strips, then watch as this savory, peppery masterpiece comes together in under ten minutes of actual cooking time.
Ingredients
The Beef & Marinade
- 1 lb (450g) flank steak, sliced thin against the grain
- 1 tbsp soy sauce
- 1 tsp toasted sesame oil
- 1 tsp cornstarch
- 1/2 tsp freshly cracked black pepper
The Stir Fry Sauce
- 1/4 cup (60ml) beef broth or water
- 2 tbsp oyster sauce
- 1 tbsp soy sauce
- 1 tsp dark soy sauce (optional, for color)
- 1 tbsp Shaoxing wine or dry sherry
- 1 tsp sugar
- 1 tsp cornstarch
Aromatics & Vegetables
- 2 large bell peppers (one green, one red), sliced into strips
- 1 medium yellow onion, sliced into wedges
- 3 cloves garlic, minced
- 1 inch fresh ginger, finely grated
- 2 tbsp neutral oil (grapeseed or vegetable), divided
- 1/2 tsp coarse ground black pepper (extra for finishing)
Instructions
- 1
Whisk the beef strips with 1 tablespoon soy sauce, sesame oil, 1 teaspoon cornstarch, and 1/2 teaspoon black pepper in a medium bowl; let marinate for 15 minutes while you prep the vegetables.
- 2
Combine all sauce ingredients in a small jar or bowl, whisking until the cornstarch is completely dissolved and no lumps remain.
- 3
Heat 1 tablespoon of oil in a wok or large cast-iron skillet over high heat until it just begins to smoke.
- 4
Spread the beef out in a single layer in the pan and sear undisturbed for 1-2 minutes to develop a deep brown crust.
- 5
Toss the beef quickly to cook the other side for another 30 seconds, then immediately remove it from the pan and set aside on a plate.
- 6
Wipe out the pan if necessary, add the remaining tablespoon of oil, and toss in the bell peppers and onions.
- 7
Stir-fry the vegetables for 2-3 minutes over high heat until they are blistered and slightly softened but still retain a crisp snap.
- 8
Add the garlic and ginger to the center of the pan, stirring for 30 seconds until fragrant.
- 9
Return the beef and any accumulated juices to the pan, then pour the sauce mixture over the ingredients.
- 10
Toss everything constantly for about 1 minute until the sauce bubbles, thickens, and turns into a glossy lacquer that coats the beef.
- 11
Remove from heat and serve immediately over steamed white rice, garnished with an extra pinch of cracked black pepper.
Nutrition (per serving)
Estimates only — not medical or dietary advice.
- Calories
- 285 kcal
- Protein
- 26 g
- Carbs
- 11 g
- Fat
- 15 g
- Fiber
- 2 g
- Sugar
- 5 g
- Sodium
- 840 mg
Tips
- → Partial freezing makes slicing easier: Put your flank steak in the freezer for 20-30 minutes before cutting to get those paper-thin, restaurant-style strips.
- → Don't crowd the pan: If your wok isn't large enough, sear the beef in two batches. Crowding leads to steaming rather than searing, which ruins the texture.
- → Cut against the grain: Look for the long muscle fibers in the steak and slice perpendicular to them. This shortens the fibers, ensuring the meat is easy to chew.
FAQ
What is the best cut of meat for beef pepper steak stir fry?
Flank steak is the gold standard for its balance of lean meat and intense beefy flavor. Sirloin or flat iron steak also work well, provided they are sliced thin.
How do I make the beef extra tender like a restaurant?
The secret is 'velveting.' By coating the meat in a small amount of cornstarch and liquid (soy sauce/oil) before cooking, you create a protective barrier that prevents the proteins from toughening under high heat.
Can I make this stir fry spicy?
Absolutely. While the 'pepper' usually refers to black pepper and bell peppers, you can add dried red chilies to the oil at the start or a teaspoon of chili garlic sauce to the liquid mixture.
Why does my stir fry have too much liquid?
This usually happens if the pan isn't hot enough or if you cook the vegetables for too long. High heat evaporates excess moisture quickly, leaving you with a thick, clinging sauce rather than a soup.
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