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Slow Cooker London Broil 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.

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

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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.
  9. 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