This recipe for Grilled Marinated London Broil makes a flavorful, easy, and inexpensive meal. This recipe can be part of a low-carb, keto, LC/HF, diabetic, grain-free, gluten-free or Banting diet.

Grilled Marinated London Broil-slices on a cutting board with rosemary and garlic in the photo.

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Don’t plan on leftovers if you make our Grilled Marinated London Broil. This recipe turns an inexpensive cut of meat into a dinner that disappears so fast you’ll think a great dane with a quick tongue and no manners came to dinner.

In this recipe, marinating this meat infuses it with notes of garlic and rosemary. The acids in the wine and vinegar tenderize the meat as they add flavor. Sure, you must wait for the meat to marinate, but the entire hands-on time is less than twenty minutes tops. The final result is so worth planning ahead. 

Grilled Marinated London Broil-before cutting.

What is a London broil?

Rather than an actual cut of meat, London broil is actually a way of preparing a tougher, inexpensive cut of meat in a way that keeps it juicy and tender. The two cuts most commonly used for this process are a flank steak or a top round. This cooking process includes marinating the meat, broiling or grilling, and finally, thinly slicing it.

The Marinate

To make a London broil, we first marinate the meat in the refrigerator for several hours to overnight. The acid in the marinate helps to break down the tissue of the meat, making it more tender. In addition, the seasoning soaks in and creates a flavorful feast.

The Cooking Process

After marinating, the meat is grilled or broiled briefly on each side, usually just 3-5 minutes. This amount of time can vary depending on the heat of the source and the thickness of the meat. If you overcook it, however, you will end up with a tough cut of meat. Well-done does not work for a London broil. With this type of preparation, it’s better to shoot for rare or medium rare. If that’s too primal for you, consider slow cooking, like with our pot roast recipe the cut instead. 

The Final Step

The final step in making a London broil may be the most important. In this step, we cut the meat in thin slices against the grain. If you inspect the meat carefully, you should see that the fibers travel in a certain direction. By thinly cutting the long fibers cross-wise, we create thin pieces of meat with short fibers that are easier to chew and more tender.

Grilled Marinated London Broil-showing some served on a plate with some sliced on a board.

A summer feast

When I served this recipe to my family, I had plans for the leftovers. I intended to pile slices over some greens and crumble on some blue cheese for my lunch the next day. Unfortunately, there were no leftovers. My husband and my son helped themselves to slice after slice. Okay, so they weren’t the only ones. I probably had more than my share as well. The next thing I knew, the plate was empty. My lunch plans were destroyed.

This Grilled Marinated London Broil makes a summer dinner that grills up quickly. It’s perfect alongside a salad or some simple steamed or grilled veggies. For a special meal, you could pair it with this asparagus with lemon sauce from Keto Cooking Wins, my Low-Carb Garlic Almond Roasted Green Beans, or my recipe for Easy Roasted Brussels Sprouts. Enjoy!


Marinated London Broil recipe

This recipe for Marinated London Broil lets you enjoy beef on a budget. The marinade flavors the meat with hints of garlic and rosemary while helping to tenderize it. 🍴😋So easy to make!

Grilled Marinated London Broil-partially sliced.
5 from 5 votes

Grilled Marinated London Broil Recipe

This recipe for Grilled Marinated London Broil makes a flavorful, easy, and inexpensive meal. This recipe can be part of a low-carb, keto, LC/HF, diabetic, grain-free, gluten-free or Banting diet.

Course Main Course
Cuisine American, low-carb
Prep Time 10 minutes
Cook Time 10 minutes
Marinating time 5 hours
Total Time 20 minutes
Servings 6
Calories 268 kcal
Author Annissa Slusher



  1. In a glass container that is big enough to hold the meat (or a large plastic bag), stir together the wine, garlic, red wine vinegar, Worcestershire sauce, rosemary, sea salt and black pepper.

    Grilled Marinated London Broil-prepared marinade
  2. Place the meat in the marinade and turn so that both sides are coated. Cover and refrigerate for 5 hours to overnight, turning once halfway through the time period.

    Grilled Marinated London Broil-Marinating the meat
  3. Preheat the grill to high. Once the grill is preheated, remove the beef from the marinade, sprinkle lightly with additional salt and pepper if desired. Place the meat on the grill. and turn heat to low. Cover grill.

    Grilled Marinated London Broil-grilling side one.
  4. Cook meat for 4-7 minutes on first side, then turn and cook the other side for 4-7 minutes. Remove meat from grill and allow to rest on a plate for 10 minutes.

    Grilled Marinated London Broil-grilling the second side
  5. Place the meat on a cutting board and slice thinly, being careful to slice diagonally against the grain.

    Grilled Marinated London Broil-slices on a cutting board

Recipe Notes

Note: nutritional data includes the marinade, which, in reality will be discarded after the meat soaks in it. I included all of it because some will be absorbed by the meat.

Serving size: 4 ounces

Per serving: 

Net carbs (g): 1

Nutrition Facts
Grilled Marinated London Broil Recipe
Amount Per Serving (4 ounces)
Calories 268 Calories from Fat 108
% Daily Value*
Fat 12g18%
Saturated Fat 5g31%
Trans Fat 0g
Polyunsaturated Fat 0g
Monounsaturated Fat 0g
Cholesterol 60mg20%
Sodium 542mg24%
Potassium 46mg1%
Carbohydrates 1g0%
Fiber 0g0%
Sugar 0g0%
Protein 33g66%
Vitamin A 0%0%
Vitamin C 0.8%1%
Calcium 10%1%
Iron 2.5%14%
* Percent Daily Values are based on a 2000 calorie diet.