This mouthwatering London broil in the slow cooker might be the simplest dish on your menu yet! The top round roast turns out juicy and fork-tender, and the savory gravy comes together perfectly. Enjoy an impressive roast at dinnertime with plenty of leftovers!

Served Slow Cooker London Broil with mashed potatoes and carrots

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What is London broil?

London broil is a popular cooking method for a lean cut of beef. Despite the name “London,” it’s actually an American cooking method that involves a flavorful broth and plenty of low and slow cooking to get the most mouthwatering, tender bites.

A London broil is not a specific cut of meat, although it is typically made using top round roast or flank steak, which are more readily available at most grocery stores.

The slow cooker is the perfect option for preparing a London broil. Cook it for hours on low and enjoy the most tender, shreddable meat!

What’s To Love About This Recipe

Everyone needs a showstopping (yet surprisingly simple) roast recipe in their repertoire, and this one won’t disappoint!
Set it and forget it with this super-easy slow cooker recipe. You don’t need to marinate, chop, brown, or sear. It requires minimal prep!
Top round roast is a budget-friendly cut that yields tender and juicy results. It makes a nice main dish to serve for a family meal or for dinner guests.
With simple seasoning and gravy made right in the slow cooker, this dish is family-friendly, and you can serve it with everyone’s favorite sides, such as mashed potatoes, noodles, or veggies.
The leftovers are delicious! Add flavorful shredded roast to sandwiches, wraps, tacos, or a hearty stew.

Ingredients Needed

Top round roast (London broil) – Top round roast is a lean, muscular cut of beef that requires low and slow cooking to become exceptionally tender. It does not contain much marbling or fat, so it works well with broth and seasonings to infuse it with flavor. It’s usually a very affordable cut of meat, and it might sometimes be labeled as a “London broil” at the store.
Easy pot roast seasoning – I’m always a fan of homemade seasoning blends to keep your mealtime prep clean and simple! Mix up a double batch of this homemade recipe and save a step on your next meal. This blend of savory spices is probably already in your pantry and adds rich flavor and depth to the roast.
Beef broth – Beef broth keeps the roast juicy and flavorful, creating the base for the luxurious gravy that you’ll serve with the meat after slow cooking.
Cornstarch – Add a little cornstarch near the end of cooking to thicken up the juices into a seconds-worthy gravy.

2 pound top round roast (london broil) 2 tablespoons pot roast seasoning 1 cup beef broth 1 tablespoons cornstarch all on counter ready to cook recipe

How To Make London Broil In The Slow Cooker

Place the roast in the slow cooker.
Season with pot roast seasoning.

2 pound top round roast (london broil) in slow cooker

2 pound top round roast (london broil) seasoned in slow cooker

Carefully pour in broth around the bottom of the slow cooker so the seasonings do not wash off.

2 pound top round roast (london broil) with chicken broth being poured on top

Cover and cook on low for 8-9 hours or high for 4-5 hours.
Mix cornstarch with 2 tablespoons of water until smooth, then stir into the juice in the slow cooker.

London broil with Mixed cornstarch with 2 tablespoons water then poured juice in slow cooker

Cover and continue to heat for an additional 30 minutes, or until the juices have thickened.
Shred the roast and serve it with potatoes or noodles, and pour the juices over the top.

Slow Cooker London Broil being shred on baking dish on parchment paper with 2 forms

Pro Tips

Let the roast rest for at least 10 minutes before slicing or shredding to help retain the juices.
For the most tender roast results, use low heat and cook slowly for 8-9 hours. (High heat for 4-5 hours works too, but the roast may be slightly firmer.)
Browning the roast first is an optional step. This could add more flavor, but it is not required for this simplified version.

Slow cooker with cooked Slow Cooker London Broil

Recipe Substitutions and Variations

The roast is the star of the meal! The slow cooker produces such tender results, and you can easily customize the recipe with a few additions or substitutions.

Create a pot roast-style dish using top round roast by adding vegetables to the slow cooker at the beginning of cooking time, along with the meat. Carrots, potatoes, onions, and mushrooms would all be complementary.
Try adding different potato varieties such as baby reds, Yukon gold, or even cubed, peeled sweet potatoes.
Deepen the flavor of London broil by swapping broth for red wine, or add a splash of balsamic vinegar or Worcestershire sauce for a more complex flavor.
Other seasoning blends that will work well are Italian seasoning, Homemade Garlic and Herb Seasoning, or another herbal blend. Add salt if it is not included in your seasoning blend.
To add a little spice, sprinkle just a dash of crushed red pepper flakes or chipotle powder to the seasoning mix.

Alternative Cooking Methods for London Broil

To make London broil in the oven:

Preheat to 325 ℉.
Season the meat and sear if desired.
Place the roast in a Dutch oven with broth, cover, and bake for 2.5–3 hours, or until tender.

To make London broil in the Instant Pot:

Sear the meat on sauté mode, then add broth.
Cook on high pressure for 50-60 minutes, then allow a natural release for 15 minutes.
Thicken the juices with a cornstarch slurry on sauté mode.

How To Serve London Broil

Serve tasty, shredded beef over Slow Cooker Creamy Garlic Mashed Potatoes, egg noodles, or rice. Don’t forget to add a heaping spoonful of gravy over the top! Add a side of Slow Cooker Carrots with Herbed Honey Butter Sauce or your favorite roasted vegetable.

Save those leftovers! The meat can also be used for tacos, wraps, sandwiches, or burrito bowls with a delicious sauce or dressing. Or, make up a quick batch of Instant Pot Sweet Potatoes and stuff them with shredded London broil, then top with blue cheese dressing.

You can also chop or finely shred the beef for beef stew, savory chili, or add it to stuffed peppers.

Served Slow Cooker London Broil with mashed potatoes and carrots gravy being poured on top

Storing and Reheating

Store leftover beef in an airtight container in the fridge for up to 4 days, or tightly sealed in the freezer for up to 3 months.

To reheat, add to a stovetop pan with a splash of broth, or in the microwave in short bursts, covered with added liquid to prevent drying out. (If beef is frozen, thaw it first before reheating.)