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Grilled London Broil Recipe 🥩

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Our Keto London Broil is a delightful beef steak with only five simple ingredients. It's easy to make and perfect for those following a keto lifestyle! This low-carb version of the classic dish brings together tender and juicy beef, bursting with delicious flavors and seasoned to perfection. So get ready to enjoy a restaurant-quality steak!

Perfectly cooked, sliced London broil presentation.
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Preparation and cooking overview

Preparing this London Broil takes only 15 minutes! Marinate the meat for an hour and pan-sear it to perfection. The result is juicy meat infused with flavors!

Chef's note

We prefer our London Broil medium-rare but you can adjust the cooking time as per your preference. If you don't want a medium-rare steak, use a meat thermometer to get desired results. Here is a chart for a better understanding:

DonenessDescriptionInternal temperature in Fahrenheit (°F)Internal temperature in Celsius (°C)
RareCool red center125°F52°C
Medium RareWarm red center135°F57°C
MediumWarm pink center145°F63°C
Medium WellSlightly pink center150°F66°C
Well DoneLittle or no pink160°F71°C
  • Prep Time: 5 minutes
  • Marinating time: 1 hour
  • Cooking Time: 10 minutes
  • Rest time: 10 minutes
  • Total Time: 1 hour 25 minutes
  • Difficulty Level: Easy
  • Recipe Makes 4 Servings

🥩 Ingredients for this London broil recipe

Here is a simple ingredient list for this delicious steak recipe:

  • ½ small yellow onion, finely chopped
  • 5 cloves garlic, finely chopped
  • ¼ cup olive oil extra virgin
  • 2 tablespoons soy sauce
  • 1 ¼ pound London Broil round steak
Keto London broil recipe sliced and served on a wooden serving dish.

Ingredient substitutions

  • Yellow onion: Use white onion or shallot as a substitute.
  • Garlic cloves: Don't have garlic cloves? Grab some garlic powder instead. As a general rule, use ⅛ teaspoon of garlic powder to replace one clove.
  • Olive oil: Swap out olive oil with avocado oil, and you're good to go!
  • Soy sauce: Use Tamari or Worcestershire sauce for a tangy and sweet flavor.
  • London broil: If you're unable to find London broil, you can use flank steak, sirloin steak, top-round steak, skirt steak, or even hanger steak.

Additional ingredients

Add these optional ingredients for an extra kick to your dish:

  • Fresh herbs: Add rosemary or thyme to your marinade for an aromatic twist.
  • Spices: Sprinkle a dash of paprika, cayenne pepper, or crushed black pepper for a spicy kick.
  • Citrus: Fresh lemon juice in the marinade can help tenderize the steak.
  • Balsamic vinegar: Sprinkle some balsamic vinegar into your seasoning mix for enhanced flavor.
Low carb London broil recipe.

Cooking tools required

To make this London Broil recipe, you will need the following kitchen tools:

  • Knife
  • Cutting board
  • Sealable plastic bag
  • Cast iron pan
  • Spatula or tongs
  • Meat thermometer
  • Mixing bowl

Tools substitute options

  • Sealable plastic bag: If you don't have a plastic zip-lock bag, use a bowl with a lid or a glass container with a tight-fitting lid.
  • Cast iron pan: Instead of a cast iron pan, use a non-stick skillet or a grill pan.
Detailed shot of London broil texture.

How to make London Broil: step-by-step guide

Cooking methods

  • Pan-searing

Preparation steps

  1. Gather all your ingredients and measure them.
  2. Prepare the cooking tools.
  3. Finely chop the onion and garlic cloves.

Cooking instructions

  1. Add chopped onions, garlic, soy sauce, and olive oil in a medium bowl. Give them a good mix and set aside.
  2. In a ziplock plastic bag, pour the marinade and put the meat inside. Mix them well and seal the plastic bag. Let it refrigerate for at least an hour.
  3. Remove it from the fridge 30 minutes before cooking and bring it to room temperature.
  4. Then, heat a cast iron pan over medium-high heat. Cook for about 3-4 minutes per side for medium rare.
  5. Remove the steak from the pan. Let it rest for 5 to 10 minutes and slice against the grain.
  6. Top the slices with chopped fresh parsley or cilantro and serve.
Chopped onion and garlic, soy sauce, and olive oil mixed in a bowl.
Mixing the marinade ingredients with a wooden spatula.
Putting London broil round steak slices in a sealable plastic bag.

Chef's pro tip

Here is a great tip to get tender London Broil: don't skip the 'resting' phase. Resist the temptation to dive right in after pan-searing. Let the steak rest for about 5 minutes.

What to serve with London broil?

Here are some delicious side dishes that pair perfectly with the London broil.

  • Chimichurri sauce: A refreshing Keto Chimichurri Sauce is a great option to enhance the beef flavors.
  • Creamy cauliflower mash: This low-carb alternative to traditional mashed potatoes pairs well with the richness of the steak.
  • Grilled asparagus: The bitterness of asparagus provides a refreshing contrast.
  • Roasted Brussels sprouts: Brussels Sprouts pair nicely with this tasty beef.
  • Zucchini noodles (Zoodles): Zoodles offer a light, refreshing counterpoint.
  • Avocado salad: Avocado's natural creaminess pairs well with the steak. Make an avocado green salad to complement your dish.
Close-up of juicy London broil recipe.

How to make it healthier?

  • Swap out soy sauce: Soy sauce is high in sodium. So use coconut aminos or liquid aminos to lower the sodium content.
  • Add more veggies: While beef is the star, don't forget the power of vegetables. Serve the steak with leafy greens or roasted green beans.

Time-saving tips

  • Use a blender: Use a blender to make the London broil marinade. Pulse the garlic cloves, onions, soy sauce, and olive oil in the blender for 10 seconds. You can also use a food processor or immersion blender.
  • Use a meat mallet: Gently pound the surface of the steak with a meat pounder. It makes the steak more tender and speeds up the cooking process.
Whole London broil on rustic serving tray.

What can I prepare ahead of time?

  • Marinaded steak: Marinate the meat with London broil seasoning. Store it in a sealable plastic bag in the refrigerator. This will save you time and allow it to absorb the flavors.

Storage and reheating instructions

Storage tips

To store the leftover steak, let it cool down to room temperature. Then wrap it tightly in plastic wrap or transfer it to an airtight container.

  • Refrigerator: Store it in the fridge for 3-4 days.
  • Freezer: Place the leftovers in a freezer-safe bag. It will keep for 2-3 months.
Freshly cooked London broil before slicing.

Reheating tips

You can easily reheat the leftovers. In case they are frozen, thaw them in the refrigerator overnight. Then follow the practices below:

  • Oven: Preheat your oven to 350°F (175°C). Place the leftover steak on a baking sheet and cover it with an aluminum foil. Heat it for 10-15 minutes or until it reaches your desired temperature.
  • Stovetop: Heat a small amount of oil in a cast-iron skillet over medium-high heat. Add the leftovers to the hot skillet and cook for 1-2 minutes per side or until heated.

Recipe wrap-up and conclusion

This Keto London Broil is the perfect addition to your keto diet. You can enjoy the gourmet-level dish right in your home with only five ingredients. Isn't it a fantastic way to sizzle up your everyday meal?

So fire up your pan, snap a photo, and tag us on Insta!

London broil served on a wooden tray.

Frequently asked questions

Absolutely! The longer you marinate the London broil cut, the more flavorful it will be. Just don't do it over 24 hours.

Definitely! The cooking times should be similar to pan grilling but always use a meat thermometer to check the doneness.

Score the surface lightly with a sharp knife on each side.

Ensure the pan is well-heated before adding the meat. A hot pan quickly sears the outside of the steak, creating a crust that prevents sticking.

For kids, cut the tender steak into smaller pieces before serving. You can also make a fun dipping sauce on the side — like a mild salsa or a creamy avocado dip.

📖 Recipe

Keto London broil recipe.

London Broil

Our Keto London Broil is a flavorful and tender beef steak, perfect for those following a keto lifestyle, with easy preparation and a delicious marinade.
5 from 1 vote
Print Rate Pin Recipe
Course: Main Course
Cuisine: American
Keyword: london broil, low carb, steak dish
Prep Time: 5 minutes
Cook Time: 10 minutes
Marinating & Resting: 1 hour 10 minutes
Total Time: 1 hour 25 minutes
Servings: 4
Calories: 334kcal

Ingredients

  • ½ small yellow onion finely chopped
  • 5 cloves garlic finely chopped
  • ¼ cup olive oil extra virgin
  • 2 tablespoons soy sauce
  • 1 ¼ pound London Broil round steak
US Customary - Metric

Instructions

  • Add chopped onions, garlic, soy sauce, and olive oil in a medium bowl. Give them a good mix and set aside.
  • In a ziplock plastic bag, pour the marinade and put the meat inside. Mix them well and seal the plastic bag. Let it refrigerate for at least an hour.
  • Remove it from the fridge 30 minutes before grilling and bring it to room temperature.
  • Then, heat a cast iron pan over medium-high heat. Cook for about 3-4 minutes per side for medium rare.
  • Remove the steak from the pan. Let it rest for 5 to 10 minutes and slice against the grain.
  • Top the slices with chopped fresh parsley or cilantro and serve.

Video

Nutrition

Nutrition Facts
London Broil
Amount Per Serving
Calories 334 Calories from Fat 180
% Daily Value*
Fat 20g31%
Saturated Fat 4g25%
Polyunsaturated Fat 2g
Monounsaturated Fat 13g
Cholesterol 89mg30%
Sodium 585mg25%
Potassium 553mg16%
Carbohydrates 3g1%
Fiber 0.4g2%
Sugar 1g1%
Protein 33g66%
Vitamin A 1IU0%
Vitamin C 2mg2%
Calcium 40mg4%
Iron 3mg17%
*

Nutritional values are estimates only and do not include carbs from sugar alcohols.

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