Spicy Pepper Beef Stir-Fry Over Rice

A fiery, fast, and flavor-packed stir-fry that rivals your favorite takeout. Tender slices of beef, crisp bell peppers, and onions are wok-tossed in a savory, spicy, and slightly sweet sauce. Ready in under 30 minutes and guaranteed to satisfy those spicy cravings.

Why This Stir-Fry Wins

Better Than Takeout: Fresh ingredients, no MSG, and customizable heat level.
Weeknight Hero: Cooks faster than delivery.
Restaurant Technique: The velveting method for impossibly tender beef.
Sauce is Everything: The perfect balance of spicy, savory, sweet, and umami.

Ingredients (Serves 4)

For the Velveted Beef:

1 lb (450g) flank steak, sirloin, or skirt steak, sliced thinly against the grain
1 tbsp cornstarch
1 tbsp soy sauce
1 tbsp Shaoxing wine or dry sherry
1 tsp baking soda (optional, for ultra-tenderness)
1 tsp vegetable oil

For the Stir-Fry Sauce:

⅓ cup low-sodium soy sauce
3 tbsp hoisin sauce
2 tbsp Shaoxing wine or dry sherry
1 tbsp oyster sauce (or vegetarian oyster sauce)
1 tbsp rice vinegar
2 tsp sesame oil
1-2 tbsp sambal oelek, chili garlic sauce, or gochujang (adjust to heat preference)
1 tbsp brown sugar
2 tsp cornstarch

For the Stir-Fry:

3 tbsp vegetable oil, divided
1 onion, sliced
3 bell peppers (mixed colors), sliced
4-6 dried red chilies (like arbol or Chinese chilies), optional for extra heat
4 cloves garlic, minced
1 tbsp fresh ginger, minced
Green onions, sliced, for garnish
Toasted sesame seeds, for garnish
Cooked white or brown rice, for serving

Step-by-Step Instructions

Step 1: Velvet the Beef (The Secret to Tenderness)

In a bowl, combine beef slices with cornstarch, soy sauce, Shaoxing wine, baking soda (if using), and oil. Massage well and let marinate for 15-20 minutes.

Step 2: Make the Sauce

Whisk all sauce ingredients in a bowl until the cornstarch is fully dissolved. Set aside.

Step 3: Stir-Fry in Stages (High Heat is Key)

Heat a wok or large skillet over high heat until smoking hot. Add 1 tbsp oil.
Sear the beef: Add beef in a single layer and let it sear undisturbed for 1 minute. Toss and cook for another 1-2 minutes until just browned but not cooked through. Remove to a plate.
Add remaining 2 tbsp oil. Add dried chilies (if using), then onions and bell peppers. Stir-fry for 3-4 minutes until crisp-tender and slightly charred.
Push vegetables to the side. Add garlic and ginger to the center and cook for 30 seconds until fragrant.
Return beef (and any juices) to the wok. Give the sauce a quick re-stir and pour it over everything.
Cook, tossing constantly, for 1-2 minutes until the sauce thickens and coats everything in a glossy glaze.

Step 4: Finish & Serve

Remove from heat. Stir in half the green onions.
Serve immediately over steamed rice.
Garnish with remaining green onions and sesame seeds.

Pro Techniques for the Perfect Stir-Fry

Slice Against the Grain: This breaks up the muscle fibers for tender beef.
The Wok Must Be HOT: A smoking-hot wok creates the essential “wok hei” (breath of the wok) flavor.
Do Not Overcrowd: Cook in batches if needed. Crowding steams the food.
Mise en Place: Have everything chopped and sauces mixed before you start cooking. It moves fast!
Cornstarch Slurry: The cornstarch in the sauce creates that classic restaurant-style glossy coating.

Customization & Variations

Protein Swaps:

Chicken: Use sliced chicken breast or thigh.
Pork: Use thinly sliced pork loin or shoulder.
Tofu: Use extra-firm tofu, pressed and cubed. Pan-fry until crispy before adding.

Vegetable Add-Ins:

Broccoli florets, snap peas, carrots, mushrooms, or baby corn.

Heat Level Adjustment:

Mild: Omit dried chilies and use 1 tsp chili sauce.
Medium: Use as written.
Nuclear: Add 1 tsp Sichuan peppercorns (for mouth-numbing mala) and extra fresh Thai chilies.

Gluten-Free: Use tamari instead of soy sauce, and ensure hoisin/oyster sauces are GF.

Serving Suggestions

Over: Steamed jasmine rice, brown rice, or cauliflower rice.
With: A side of quick-pickled cucumbers or a simple egg drop soup.
As Lettuce Wraps: Serve with butter lettuce leaves for a low-carb option.

Storage & Reheating

Fridge: Store in an airtight container for up to 3 days.
Freeze: Freeze (without rice) for up to 2 months.
Reheat: Gently in a skillet with a splash of water to loosen the sauce. Microwaving may overcook the beef.