Slow Cooker London Broil

Name: Slow Cooker London Broil
Prep time: 5 min
Cook time: 9 h
Total time: 9 h 5 min
Yield: 6
Cuisine: American
Ingredients: 1 ½ pounds London broil; salt and pepper; 2 cloves garlic, minced; 1 medium yellow onion, sliced thinly; 3/4 cup beef broth; 2 tablespoons soy sauce; cornstarch for thickening sauce, if desired

This post may contain affiliate links. See our Privacy Policy for details.

Jump to Recipe· 3.7 from 6 reviews

Delicious, tender London Broil is easy to make in the slow cooker! Simply prep this easy crock pot recipe in the morning and enjoy fork-tender London Broil for dinner!

slow cooker london broil over egg noodles with onions and gravy

Want to save this recipe?

Enter your email & I’ll send it to your inbox. Plus, get great new recipes from me every week!

I used to avoid cooking London Broil. It’s a very lean cut of meat which means it is easy to dry it out while cooking.

Enter the Crock Pot.

Once I experimented with how to cook it in a slow cooker, I was hooked. With just 5 minutes of prep time and a full day cooking, you can have fork-tender meat without worrying about drying it out!

You might also like my Bacon Wrapped Pork Tenderloin, Grilled Grouper, or Calico Beans recipes!

What Cut of Meat is London Broil?

Originally London broil was made with flank steak, but over the years, the name has been applied to many other lean, thick cuts of beef, such as top round. Generally, you will find London broil being marketed as anything from a 1-inch steak to a 4-inch roast that comes from the sirloin or round sections of beef. These cuts all have something in common: They are lean and tend to be tougher.

Although the label may not direct the consumer how to cook the piece of meat, a London broil is meant to be marinated and cooked over high heat. It’s a great way to get a really good meal out of a less expensive cut of meat.
The Spruce Eats

Ingredients

london broil
onion
garlic
salt and pepper
beef broth
soy sauce
cornstarch for thickening the sauce if desired

Step by step

Season the meat with salt and pepper and place in the slow cooker.
Add beef broth, soy sauce, thinly sliced onion, and minced garlic over the meat.
Cook on low allllllll day long! (At least 9 hours.)
Remove the meat and allow it to rest until the internal temperature is 120 degrees Fahrenheit (this article explains why this keeps it juicy and not dried out!) This is the perfect time to make gravy with all those juices leftover in the slow cooker!
Enjoy tasty dinner without a big fuss!

slow cooker london broil with onions and gravy over pasta

Tips for best results

The longer you cook the meat, the more likely it will eventually shred, which is how I prefer it. If you want a more firm roast for slicing start checking the broil around 6 hours for doneness.
Final cooking time will vary by exact size of your London broil and the cooking temperature of your particular slow cooker.
Rest the meat at least 10 minutes before slicing to allow juices to redistribute.

Variations

add a packet of onion soup mix to the liquid before cooking to intensify the flavor of the sauce
mix a half cup of sour cream into the gravy for a creamier version

FAQs

Do I need to sear the meat before adding to the slow cooker?

No, this recipe does not require the meat to be seared. The long, slow cook time keeps it plenty juicy!

Can I add potatoes and carrots to the slow cooker with the london broil?

Yes! If you would like carrots and potatoes with your meat, add them for the last 2-3 hours of cooking. You will want to use baby carrots or full-size carrots chopped into 2 inch pieces and chop your potatoes into 2 inch pieces as well.

Can I freeze london broil after cooking?

Yes! Freeze after cooking in a freezer bag or freezer-safe container for up to 3 months. Thaw overnight in the refrigerator.

How long do leftovers last?

Store any leftovers in an airtight container in the refrigerator up to 3 days. After 3 days I recommend freezing the leftovers for future use. Reheat in the microwave or in the oven at 375 degrees F for 15 minutes or until heated through. Be sure to see our ways to use leftover london broil if you have a lot of leftovers!

Serving suggestions

Wondering what to serve with london broil? My favorite way to serve this recipe is to thicken the drippings left in the slow cooker and serve it over egg noodles…it’s reminiscent of stroganoff without the mushrooms!

You can also try it with a side of mashed potatoes, rice, roasted potatoes, or keep it low carb with a simple side Caesar salad.

If you try this recipe, please comment or rate it below, I love hearing from you!