The Ultimate Guide to Smoked London Broil

Skip the traditional oven broiling and take your London broil to the next level by smoking it. Get ready for a mouthwatering experience as this marinated meat absorbs the smoky flavors, resulting in a top-notch steak that will leave you wanting more.

Smoked and sliced London broil on a wooden cutting board

Can You Smoke London Broil?

Absolutely! While London broil is typically broiled in the oven or grilled on high heat, you can also smoke it to perfection. London broil, also known as top round, benefits greatly from a flavorful marinade and the slow cooking process of smoking. This lean and often tough cut becomes tender and juicy when marinated and cooked low and slow.

Smoked London Broil marinade in a zip-top bag

Smoked London Broil Marinade

To achieve the best results when smoking a London broil, marinate it for at least 4 hours (ideally up to 8 hours) before cooking. The marinade combines simple ingredients to enhance the flavors of this classic dish.

Here’s what you need for the marinade:

  • 1/2 cup olive oil
  • 1/4 cup red wine vinegar
  • 1/4 cup honey
  • 2 tablespoons Worcestershire sauce
  • 1 1/2 teaspoons black pepper
  • 1 1/2 teaspoons salt
  • 5 sprigs fresh thyme
  • 5 cloves minced garlic
  • 1 teaspoon red pepper flakes

Combine all the ingredients in a non-reactive bowl or a gallon-sized zip-top bag. Add the meat to the marinade and massage it to ensure even coating. Place the marinade in the fridge for 4-8 hours to allow the flavors to penetrate the meat.

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Tongs placing marinated round roast on the smoker

How to Smoke a London Broil

Once the meat has marinated, it’s time to fire up the smoker and start cooking. Follow these steps to achieve the ultimate smoked London broil:

  1. Preheat: Start by preheating your favorite smoker to 225 degrees F. Oak, cherry, or pecan wood are recommended for adding just the right amount of smoky flavor without overpowering the meat.
  2. Smoke: Remove the meat from the marinade and shake off any excess herbs. Place the meat directly on the grill grates of the smoker, close the lid, and smoke for approximately 45 minutes. For a rare steak, remove the meat when it reaches 125 degrees F, or for a medium-rare steak, remove it at 135 degrees F.
  3. Sear: If desired, preheat a cast-iron skillet over medium-high heat and drizzle in some high-heat oil (such as avocado oil). Place the smoked meat in the skillet and cook for 2-3 minutes per side to achieve a flavorful crust.
  4. Rest and serve: Transfer the meat to a cutting board or serving dish and let it rest for 5-10 minutes. Use a sharp knife to slice the meat thinly against the grain for the most tender bites. Now, it’s time to enjoy your beautifully smoked London broil.

London broil on the grill grates of a smoker

How Long to Smoke a London Broil

With the smoker set at a steady temperature of 225 degrees F, it usually takes around 45 minutes to smoke a London broil to medium-rare. Keep in mind that this time may vary slightly depending on the thickness of the meat and the type of smoker used. To ensure doneness, use a meat thermometer to check that the internal temperature reaches 125 degrees F for a rare steak or 135 degrees F for a medium-rare steak.

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Smoked London broil on a wooden board

Tips for Smoking London Broil

To achieve a tender and juicy London broil cooked to perfection, keep these tips in mind:

  • Avoid overcooking: London broil is best enjoyed at medium-rare. Cooking it beyond medium-rare can lead to dry meat due to its low fat content. Aim for an internal temperature of 130-135 degrees F for a juicy and flavorful steak.
  • Master the art of slicing: To maximize tenderness, slice the London broil thin and against the grain. Angle your chef’s knife at 45 degrees and cut slices that are less than 1/4 inch thick. These thin slices will melt in your mouth.
  • Combine smoking and searing: While you can cook the London broil entirely at 225 degrees F, adding a charred and crunchy crust enhances the overall flavor. Consider searing the meat in a heated cast-iron skillet or over hot coals during the last few minutes of cooking.

Smoked and sliced London broil on a wooden cutting board


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Congratulations! You now have the ultimate guide to smoking London broil. By following these steps and tips, you can create a delicious and unforgettable meal. Visit Rowdy Hog Smokin BBQ to discover more mouthwatering recipes and become a backyard BBQ hero. Don’t forget to leave a comment to let us know how your smoked London broil turned out, and join the conversation on social media by searching for @HeyGrillHey. Happy smoking!