Cambodian Beef Loc Lac Recipe

Cambodian beef loc lac with seared beef cubes, Romaine lettuce, sliced tomato, and lime-pepper sauce. — Seared beef loc lac served over cool lettuce and tomato with a sharp lime-pepper sauce.

5.0 from 1 vote

Loc Lac is the kind of beef dish that makes a weeknight feel a little more special without asking much of you. Cubes of beef soak up a savory marinade of oyster sauce, garlic, and thick soy, then hit a hot pan until the edges caramelize and the center stays juicy. It is served on a bed of cool lettuce and tomato, with a sharp lime-pepper sauce on the side that cuts through the richness of the meat. If you have ever ordered shaking beef at a Vietnamese restaurant, this is its Cambodian cousin—simple, fast, and built around the contrast between hot seared beef and cold, crisp vegetables.

What makes this version work is the balance. The marinade is salty and gently sweet. The lime sauce is sour and peppery. The lettuce and tomato cool everything down. You do not need a wok or a special cut of beef, though a tender cut helps. A hot frying pan and a little patience while the meat rests are enough to get a good result at home.

What You Need

The marinade does most of the work here, so it helps to have the sauces ready before you start cutting the beef. Oyster sauce gives the beef its deep savory base, while fish sauce adds the salty, fermented note that is essential in Cambodian cooking. Thick soy sauce—sometimes sold as dark soy sauce—adds color and a mild sweetness. Garlic and black pepper round out the marinade. For the platter, crisp Romaine and sliced tomato are the traditional base, and the lime-pepper sauce comes together in a small bowl while the beef cooks.

If you are new to fish sauce, it is worth knowing that it is not just salt in liquid form. It is a fermented seasoning that brings umami and depth, and it behaves differently from soy sauce in a marinade. You can read more about how fish sauce works in Cambodian cooking if you want to understand the ingredient before you use it.

Equipment

Chef’s knife: To cut the beef into even bite-size cubes so they cook at the same rate.
Cutting board: To safely cut the beef and slice the tomatoes.
Large mixing bowl: To toss the beef with the marinade and let it sit.
Measuring spoons: To measure the oyster sauce, sugar, fish sauce, soy sauce, and black pepper.
Frying pan: A wide pan is best because it lets the beef sear instead of steam.
Wooden spoon or spatula: To stir the beef as it cooks without scratching the pan.
Small bowl: To mix the lime juice, garlic, and pepper for the dipping sauce.
Serving plate or platter: To arrange the lettuce and tomato before adding the beef.

How to Make Cambodian Beef Loc Lac

Step 1: Marinate the beef

Place the beef cubes in a large bowl. Add the oyster sauce, sugar, fish sauce, minced garlic, thick soy sauce, and black pepper. Mix gently with your hands or a spoon until every piece of beef is coated. Cover the bowl and refrigerate for at least 2 hours. If you have time, overnight gives the marinade more time to penetrate the meat.

Step 2: Prepare the vegetable platter

While the beef marinates, wash the Romaine lettuce and arrange the leaves on a serving plate. Slice the tomatoes and lay them over the lettuce. Keep the platter cool until the beef is ready.

Step 3: Mix the lime-pepper sauce

In a small bowl, squeeze the juice of one lime. Add minced garlic, salt and black pepper to taste—or use fish sauce instead of salt, as the supplied recipe suggests. Add a small pinch of sugar if you want to soften the sharpness. Stir and set aside. The sauce should taste sour, salty, and peppery, not sweet.

Step 4: Sear the beef

Heat 2 tablespoons of oil in a frying pan over high heat. The pan should be hot before the beef goes in. Add the marinated beef in a single layer. If your pan is small, cook the beef in two batches so the pieces sear rather than release water and boil. Cook, stirring occasionally, until the beef is no longer pink. For medium-rare, pull it off the heat while the center is still slightly pink. For well done, cook it a little longer. If you want to check doneness with a thermometer, whole cuts of beef are considered safe at 145°F (63°C) with a 3-minute rest, according to the USDA safe temperature chart.

Step 5: Rest the beef

Turn off the heat and let the beef rest in the pan for 5 minutes. This short pause allows the juices to settle so they do not run out onto the lettuce when you serve it.

Step 6: Assemble and serve

Spoon the beef over the bed of lettuce and tomato. Garnish with sliced green onion or cilantro. Serve the lime-pepper sauce on the side, with steamed jasmine rice if you like.

Cooking Tips

Do not crowd the pan. This is the most common reason stir-fried beef turns gray and steamy instead of browned. Cook the beef in batches if necessary, and let the pan come back to high heat between batches.

Taste the marinade before you cook the beef. If it tastes too salty, you can add a little more sugar. If it tastes flat, a small splash of fish sauce or soy sauce will wake it up. The marinade is forgiving, but it should taste balanced before it goes into the pan.

Resting the beef is not optional if you want juicy meat. Five minutes off the heat is enough to keep the center tender without cooling the dish down.

How to Serve

Loc Lac is traditionally served with steamed jasmine rice, and the rice is useful for soaking up the lime-pepper sauce and the juices from the beef. A fried egg on top is a common addition in Cambodia, though it is not part of the supplied recipe. The dish also works with extra lettuce on the side or cucumber slices if you want more crunch. If you enjoy this style of beef, our Cambodian Lok Lak wrap with flat bread takes the same flavors in a different direction, and a Khmer hot beef salad offers another way to pair seared beef with crisp vegetables.

Frequently Asked Questions

Can I use a different cut of beef?

The supplied recipe calls for “good beef cube to bite size,” which suggests a tender cut that cooks quickly. Sirloin or tenderloin are practical choices because they stay tender when seared over high heat. Tougher cuts like stew beef will not give the same result in a quick stir-fry.

Can I marinate the beef for less than 2 hours?

Yes, but the flavor will be milder. Two hours is the minimum in the supplied recipe because it gives the beef time to absorb the salty and savory notes from the marinade. If you are short on time, 30 minutes will still season the outside of the meat, but it will not penetrate as deeply.

Is this recipe gluten-free?

It depends on the sauces. Oyster sauce and soy sauce can contain wheat. If you need a gluten-free version, check the labels on your oyster sauce and soy sauce, or look for brands that are specifically labeled gluten-free.

Can I make the lime-pepper sauce ahead of time?

The sauce is best mixed fresh because the lime juice and garlic lose their sharpness over time. If you need to prep it ahead, mix the lime juice, fish sauce, and sugar, and add the minced garlic and black pepper just before serving.

Final Thoughts

Loc Lac is a good reminder that a dish does not need a long ingredient list or a complicated technique to feel complete. The marinade does the quiet work of seasoning the beef, the hot pan gives it a crust, and the cold lettuce and lime sauce keep the whole plate fresh. Cook the beef just until it is done, let it rest for a few minutes, and serve it while the contrast between hot and cool is still at its best. If you try this recipe, our Cambodian stir-fried beef video shows the same high-heat technique in action and can help you judge how the beef should look in the pan.