Saucy Beef Pepper Steak Stir-Fry (Quick and Easy) Step-by-step instructions

Before you start

Before turning on the heat, it is absolutely essential to have all of your ingredients prepped, measured, and arranged near the stove. Stir-frying is an incredibly fast-paced cooking method, leaving zero time for chopping or measuring once the pan is hot.

Slice the flank steak, chop the bell peppers, and have your savory brown sauce measured and ready in a small bowl. Having this 'mise en place' ready ensures a smooth, stress-free cooking process and prevents ingredients from burning while you scramble to prepare the next step.

Instructions

Beef Preparation and Searing

1. 1Sear the Beef (First Batch)
   Heat a large wok or skillet over high heat until extremely hot. Add half of the sliced flank steak in a single layer and sear without moving for 1 to 2 minutes to get a deep brown crust. Stir-fry for another minute until cooked through, reaching an internal temperature of 145°F (63°C). Transfer the beef to a plate and let it rest for at least 3 minutes.
   Look for The beef is deeply browned and caramelized.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Searing in batches prevents crowding and steaming.
2. 2Sear the Beef (Second Batch)
   Add the remaining sliced flank steak to the hot wok. Sear without moving for 1 to 2 minutes, then stir-fry for another minute until cooked through to an internal temperature of 145°F (63°C). Transfer to the plate with the first batch and let all the beef rest for at least 3 minutes.
   Look for The beef is caramelized and cooked through.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Letting the meat rest keeps it tender and juicy.

The flank steak slices should sport a deep, caramelized brown crust on both sides, and the sizzling in the pan will be loud and active. The meat will be cooked through to a safe internal temperature of 145°F (63°C).

After resting, a small amount of savory juices will pool on the plate; these juices are incredibly flavorful and should be saved to add back into the wok during the final assembly.

Vegetable Stir-Fry

3. 3Stir-Fry the Peppers
   In the same hot wok, add the sliced green and red bell peppers. Stir-fry for 2 to 3 minutes until they are tender-crisp and vibrant in color, maintaining their pleasant crunch.
   Look for The peppers are bright and slightly softened.
   Tip Keep the peppers moving constantly to avoid burning.

The red and green bell peppers will look bright, glossy, and slightly softened while retaining a crisp texture. They should release a sweet, grassy aroma as they toss in the hot wok. The edges of the pepper strips may show very slight charring from the high heat, indicating they are perfectly cooked and ready for the final combination step.

Sauce Thickening and Assembly

4. 4Thicken and Combine
   Return the rested beef and any accumulated juices to the wok with the peppers. Pour in the savory brown sauce. Cook, stirring constantly, for 1 to 2 minutes until the savory brown sauce bubbles, thickens, and glossily coats the beef and peppers.
   Look for The sauce is thick, bubbling, and glossy.
   Tip Serve immediately while the stir-fry is piping hot.

The savory brown sauce will bubble vigorously, transforming from a thin liquid into a thick, glossy glaze that completely coats the beef and vegetables. The steam rising from the wok will carry a rich, mouthwatering aroma of caramelized soy and savory spices, indicating the dish is fully combined and ready to serve immediately.

Common mistakes

One of the most common mistakes in stir-frying is overcrowding the pan. When too much cold meat or vegetables are added to the wok at once, the pan temperature drops dramatically, causing the ingredients to steam and boil in their own moisture rather than sear.

This results in tough, gray beef and soggy, limp peppers. To avoid this, cook the beef in a single layer, and if your pan is not large enough, sear the meat in two separate batches to maintain that crucial high heat.

How to tell it’s done

Determining the perfect doneness for this stir-fry involves checking both the beef and the vegetables. The flank steak is perfectly cooked when it reaches a safe internal temperature of 145°F (63°C) and has rested for at least 3 minutes, ensuring it remains juicy and tender.

The bell peppers should be tender-crisp, meaning they are cooked through but still offer a satisfying crunch when bitten. Finally, the sauce is done when it is thick enough to coat the back of a spoon and leaves a clear path when a spatula is drawn through the center of the wok.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest