Tender Slow Cooker London Broil


Indulge in the succulent and mouthwatering flavors of Slow Cooker London Broil—a delightful dish that combines tender beef with aromatic spices for an effortless and flavorful meal. This recipe brings out the best in London Broil, a lean and budget-friendly cut of beef, by slow-cooking it to perfection. With the convenience of a slow cooker, you can achieve tender, juicy, and flavorful meat that is perfect for any occasion, from busy weeknights to special gatherings. Let’s dive into the ingredients, step-by-step instructions, and valuable tips to prepare this delicious and hassle-free Slow Cooker London Broil that will leave your taste buds yearning for more.


  • 2 lbs London Broil (top round or flank steak)
  • 1 large onion, thinly sliced
  • 3 cloves garlic, minced
  • 1 cup beef broth
  • 1/2 cup soy sauce
  • 1/4 cup balsamic vinegar
  • 2 tablespoons Worcestershire sauce
  • 2 tablespoons brown sugar
  • 1 teaspoon dried thyme
  • 1 teaspoon dried rosemary
  • 1/2 teaspoon ground black pepper
  • 2 tablespoons vegetable oil (for searing)
  • 2 tablespoons cornstarch (optional, for thickening the sauce)
  • 2 tablespoons water (optional, for cornstarch slurry)

Step-by-Step Instructions:

Step 1: Searing the London Broil

  1. Heat vegetable oil in a skillet or a cast-iron pan over medium-high heat.
  2. Season the London Broil with ground black pepper on both sides.
  3. Sear the London Broil in the hot skillet for 2-3 minutes on each side until it develops a rich brown crust. This step adds depth of flavor to the meat.

Step 2: Preparing the Slow Cooker

  1. In the slow cooker, place the thinly sliced onions and minced garlic at the bottom to create a flavorful bed for the London Broil.
  2. Place the seared London Broil on top of the onions and garlic.

Step 3: Creating the Flavorful Marinade

  1. In a mixing bowl, combine beef broth, soy sauce, balsamic vinegar, Worcestershire sauce, brown sugar, dried thyme, and dried rosemary.
  2. Stir the marinade to ensure all the ingredients are well combined.

Step 4: Slow Cooking the London Broil

  1. Pour the marinade over the London Broil in the slow cooker, ensuring the meat is covered in the flavorful liquid.
  2. Cover the slow cooker with the lid and cook the London Broil on low heat for 6-8 hours or on high heat for 3-4 hours. Slow cooking allows the meat to become tender and infused with the delicious flavors of the marinade.

Step 5: Thickening the Sauce (Optional)

  1. If you prefer a thicker sauce, remove the London Broil from the slow cooker and transfer it to a serving plate, covering it with foil to keep it warm.
  2. In a small bowl, mix cornstarch and water to create a slurry.
  3. Gradually add the slurry to the sauce in the slow cooker, stirring until it thickens to your desired consistency.

Step 6: Serving Slow Cooker London Broil

  1. Slice the tender and flavorful London Broil against the grain into thin strips.
  2. Pour the sauce over the sliced London Broil or serve it on the side as a delicious dipping sauce.

Tips for Perfect Slow Cooker London Broil:

  1. For added depth of flavor, you can marinate the London Broil in the sauce ingredients for 30 minutes to overnight before slow-cooking it.
  2. Customize the marinade by adding your favorite herbs and spices, such as garlic powder, onion powder, or chili flakes.
  3. Be sure to slice the London Broil against the grain to ensure tenderness and easy chewing.
  4. Save any leftover sauce for drizzling over mashed potatoes, roasted vegetables, or cooked rice.
  5. Pair the Slow Cooker London Broil with a side of steamed vegetables, roasted potatoes, or a fresh salad for a well-rounded and satisfying meal.


Experience the delectable taste and tender texture of Slow Cooker London Broil—a flavorful and effortless dish that is perfect for any occasion. With its juicy and aromatic profile, this Slow Cooker London Broil promises to be a hit among family and friends. So, prepare the flavorful marinade, sear the meat, and let the slow cooker work its magic. Slice the tender London Broil and savor it with the rich and savory sauce for a truly delightful dining experience. Enjoy the convenience of slow cooking and the mouthwatering flavors of this Slow Cooker London Broil that will have everyone asking for seconds.

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