Introduction

Slow Cooker London Broil is a delicious and tender way to enjoy a classic cut of beef with minimal effort. Marinated and slow-cooked to perfection, this dish features rich flavors and comforting vegetables that make for a satisfying meal any day of the week.

Slow Cooker London Broil Recipe - Recipe Image

Ingredients

2 pounds London broil
¼ cup low-sodium soy sauce
1 Tbsp. balsamic vinegar
1 Tbsp. Worcestershire sauce
1 ¾ cup beef broth (¾ cup separated)
1 Tbsp. brown sugar
½ tsp. dried rosemary
½ tsp. dried thyme
¼ tsp. black pepper
1 Tbsp. olive oil
1 medium onion (sliced)
2 carrots (peeled and cut into chunks)
2 potatoes (cut into chunks)
4 garlic cloves
1 Tbsp. cornstarch (optional, for thickening)

Instructions

Step 1: In a medium bowl, whisk together the soy sauce, balsamic vinegar, Worcestershire sauce, ¾ cup of the beef broth, brown sugar, dried rosemary, dried thyme, black pepper, and olive oil to create the marinade.
Step 2: Place the London broil in a resealable plastic bag or shallow dish and pour the marinade over the meat. Ensure the meat is evenly coated with the marinade. Seal the bag or cover the dish, then refrigerate for at least 4 hours, or preferably overnight, to allow the flavors to infuse the meat.
Step 3: After marinating, heat a skillet over medium-high heat. Sear the London broil on all sides for 2-3 minutes per side to lock in the flavors. Once seared, transfer the meat to the slow cooker.
Step 4: Arrange the sliced onion, carrot chunks, potato chunks, and garlic cloves around the London broil in the slow cooker.
Step 5: Pour the remaining 1 cup of beef broth over the meat and vegetables. The liquid should come about halfway up the side of the meat.
Step 6: Cover and cook on low for 6-8 hours, or until the meat is fork-tender.
Step 7: Once the cooking time is complete, carefully remove the London broil from the slow cooker and let it rest for 10-15 minutes before slicing against the grain.
Step 8: If desired, strain the liquid from the slow cooker into a saucepan. In a small bowl, mix the cornstarch with a few tablespoons of cold water to create a slurry. Add the slurry to the strained liquid and bring to a boil, stirring constantly, until the sauce thickens.
Step 9: Serve the sliced London broil alongside the cooked vegetables and drizzle with the savory sauce. Enjoy!

Tips & Variations

For deeper flavor, marinate the meat overnight rather than just 4 hours.
You can substitute red wine for half of the beef broth for a richer sauce.
Add other root vegetables like parsnips or turnips for variety.
If you prefer a thicker gravy, increase the cornstarch to 2 tablespoons.

Storage

Store leftover London broil and vegetables in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave or on the stovetop until warmed through. The sauce may thicken in the fridge; add a splash of broth or water when reheating to loosen it.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I use a different cut of beef?

Yes, tougher cuts like chuck roast or round steak work well with this slow cooking method and will become tender and flavorful.

Do I need to sear the meat before slow cooking?

Searing is not required but highly recommended as it locks in flavor and adds a nice crust to the meat before slow cooking.

Slow Cooker London Broil Recipe

Print Recipe

★★★★★

4.7 from 68 reviews

This Slow Cooker London Broil recipe offers a tender, flavorful take on a classic cut of beef. Marinated in a savory blend of soy sauce, balsamic vinegar, Worcestershire sauce, and herbs, then slow-cooked with hearty vegetables, it results in a melt-in-your-mouth meal perfect for any occasion. The optional thickened sauce adds a rich finish to this comforting dish.

Author: Daniel
Prep Time: 15 minutes
Cook Time: 6 to 8 hours
Total Time: 6 hours 15 minutes to 8 hours 15 minutes
Yield: 4 servings 1x
Category: Main Dish
Method: Slow Cooking
Cuisine: American
Diet: Low Salt

Ingredients

Scale

Marinade and Meat

2 pounds London broil
¼ cup low-sodium soy sauce
1 Tbsp. balsamic vinegar
1 Tbsp. Worcestershire sauce
¾ cup beef broth (for marinade)
1 Tbsp. brown sugar
½ tsp. dried rosemary
½ tsp. dried thyme
¼ tsp. black pepper
1 Tbsp. olive oil

Vegetables and Additional Ingredients

1 medium onion, sliced
2 carrots, peeled and cut into chunks
2 potatoes, cut into chunks
4 garlic cloves
1 cup beef broth (for slow cooker)
1 Tbsp. cornstarch (optional, for thickening)

Instructions

Prepare the Marinade: In a medium bowl, whisk together the soy sauce, balsamic vinegar, Worcestershire sauce, ¾ cup beef broth, brown sugar, dried rosemary, dried thyme, black pepper, and olive oil until well combined.
Marinate the Meat: Place the London broil in a resealable plastic bag or shallow dish, pour the marinade over the meat ensuring it is evenly coated. Seal and refrigerate for at least 4 hours or preferably overnight to let the flavors penetrate.
Sear the Meat: After marinating, heat a skillet over medium-high heat. Sear the London broil on all sides for 2-3 minutes per side to lock in flavors and create a browned crust, then transfer the meat to the slow cooker.
Add Vegetables: Arrange the sliced onion, carrot chunks, potato chunks, and whole garlic cloves around the London broil in the slow cooker for an infused flavor and hearty accompaniment.
Add Broth: Pour the remaining 1 cup of beef broth over the meat and vegetables in the slow cooker, ensuring the liquid covers about halfway up the meat.
Slow Cook: Cover the slow cooker and cook on low for 6 to 8 hours, or until the meat is fork-tender and vegetables are cooked through.
Rest the Meat: Carefully remove the London broil from the slow cooker and let it rest for 10-15 minutes before slicing against the grain to maximize tenderness.
Make the Sauce (Optional): Strain the cooking liquid into a saucepan. Mix cornstarch with cold water to make a slurry, then add it to the saucepan and bring to a boil while stirring until the sauce thickens to your desired consistency.
Serve: Slice the London broil and serve alongside the cooked vegetables, drizzled with the thickened sauce for a delicious, complete meal.

Notes

For best flavor, marinate the meat overnight.
Searing the meat before slow cooking helps develop deeper flavors and a better texture.
The cornstarch slurry is optional but recommended if you prefer a thicker sauce.
If you don’t have beef broth, you can substitute with beef stock or a mixture of water and beef bouillon.
Resting the meat after cooking ensures juices redistribute for a moist, tender bite.

Keywords: slow cooker London broil, beef slow cooker recipe, marinated London broil, easy slow cooker dinner, comforting beef stew