Bo Luc Lac—literally “shaking beef”—is one of Vietnam’s most beloved dishes. The name comes from the constant shaking motion of the wok or skillet during cooking, which ensures each cube of beef is seared on all sides while being tossed in a fragrant garlic butter sauce.
The result is caramelized, wok-charred beef that’s impossibly tender on the inside and glistening with a savory-sweet glaze. Served over a bed of crisp watercress and thinly sliced red onions, with a simple lime and pepper dipping sauce on the side, it’s a dish that balances richness, freshness, and brightness in every bite.
While it looks like a restaurant-only specialty, bo luc lac comes together quickly with a few key techniques. Choose high-quality beef tenderloin, get your wok screaming hot, and let the shaking begin.
Instructions
Marinate the Beef
In a medium bowl, combine the oyster sauce, soy sauce, brown sugar, minced garlic, and black pepper. Add the beef cubes and toss to coat thoroughly. Marinate for at least 30 minutes at room temperature, or up to 2 hours in the refrigerator. If refrigerating, bring to room temperature before cooking.
Prepare the Dipping Sauce
In a small bowl, combine the lime juice, salt, and coarsely ground black pepper. Stir to dissolve the salt. Set aside.
Prepare the Watercress Salad
In a large bowl, combine the watercress, thinly sliced red onion, and tomato wedges (if using). In a small bowl, whisk together the lime juice, vegetable oil, salt, and pepper. Drizzle over the salad and toss gently. Divide the salad among serving plates.
Sear the Beef
Heat a large wok or cast iron skillet over high heat until it’s smoking hot. Add the vegetable oil and swirl to coat. Working in batches to avoid overcrowding, add the beef cubes in a single layer. Let them sear undisturbed for 1 to 2 minutes until a deep brown crust forms.
Shake the wok or toss the beef to sear the other sides for another 1 to 2 minutes. The beef should be medium-rare to medium (internal temperature 130°F to 140°F / 54°C to 60°C). Remove the beef from the wok and set aside. Repeat with remaining beef.
Make the Garlic Butter Sauce
Reduce the heat to medium. Add the butter to the wok. Once melted, add the sliced garlic and cook for 30 seconds until fragrant. Add the oyster sauce, soy sauce, brown sugar, and rice vinegar.
Stir to combine, scraping up any browned bits from the bottom of the wok. Return the beef to the wok and toss to coat with the sauce. Cook for 30 seconds to 1 minute, shaking the wok continuously (luc lac), until the beef is glazed and the sauce has thickened slightly.
Assemble and Serve
Spoon the beef over the prepared watercress salad. Garnish with fresh cilantro leaves and lime wedges. Serve immediately with the lime, salt, and pepper dipping sauce on the side.
