Cooking a London broil in a slow cooker requires a flavorful liquid and a long, gentle simmer to tenderize the lean cut. This guide will show you exactly how to cook a London broil in a slow cooker so it comes out tender, juicy, and full of flavor every time. London broil is typically a tough cut of beef, but the slow cooker transforms it into a fork-tender meal with minimal effort.
You don’t need to be a chef to get this right. Just follow these simple steps, and you’ll have a delicious dinner waiting for you. Let’s get started.
Why Use A Slow Cooker For London Broil?
London broil is a lean cut, often from the top round or flank. It can be tough if cooked quickly at high heat. The slow cooker solves this problem.
Low and slow cooking breaks down the connective tissues. This makes the meat tender without drying it out. You also get a rich, savory sauce from the cooking liquid.
It’s a set-it-and-forget-it method. Perfect for busy weeknights or lazy weekends.
How To Cook A London Broil In A Slow Cooker
This is the core of the article. Follow these steps for perfect results every time.
What You Will Need
- 1 London broil (about 2 to 3 pounds)
- 1 cup beef broth (low sodium is best)
- 1/4 cup soy sauce
- 2 tablespoons Worcestershire sauce
- 3 cloves garlic, minced
- 1 medium onion, sliced
- 1 tablespoon olive oil
- Salt and black pepper to taste
- Optional: fresh herbs like rosemary or thyme
Step-By-Step Instructions
- Prep the meat. Pat the London broil dry with paper towels. Season generously with salt and pepper on both sides.
- Sear the beef (optional but recommended). Heat olive oil in a large skillet over medium-high heat. Sear the meat for 2-3 minutes per side until browned. This adds deep flavor.
- Layer the onions. Place sliced onions at the bottom of your slow cooker. They will flavor the meat and create a natural rack.
- Mix the liquid. In a small bowl, combine beef broth, soy sauce, Worcestershire sauce, and minced garlic. Stir well.
- Assemble. Place the seared London broil on top of the onions. Pour the liquid mixture over the meat. Add fresh herbs if using.
- Cook low and slow. Cover and cook on LOW for 6-8 hours or on HIGH for 3-4 hours. The meat should be fork-tender.
- Rest and slice. Remove the meat from the slow cooker. Let it rest for 5-10 minutes. Slice thinly against the grain.
- Make the sauce (optional). Strain the cooking liquid into a saucepan. Simmer on the stove for 5-10 minutes to thicken. Serve over the sliced meat.
Tips For The Best Results
- Always slice against the grain. This shortens the muscle fibers and makes each bite tender.
- Don’t skip the sear. It adds a caramelized crust that enhances the overall flavor.
- Use low sodium broth to control the salt level. Soy sauce adds plenty of saltiness.
- Add vegetables like carrots or potatoes in the last 2 hours of cooking. They won’t turn to mush.
Common Mistakes To Avoid
Even with a slow cooker, things can go wrong. Here are the most common pitfalls.
Overcooking The Meat
London broil is lean. Cook it too long, and it can become dry and stringy. Stick to the recommended times: 6-8 hours on low, 3-4 hours on high.
Not Slicing Against The Grain
This is the number one mistake. Slicing with the grain makes the meat chewy. Look for the lines in the meat and cut perpendicular to them.
Skipping The Sear
You can skip the sear, but you’ll lose flavor. The Maillard reaction from browning adds complexity that you can’t get from the slow cooker alone.
Using Too Much Liquid
Slow cookers trap moisture. You don’t need to submerge the meat. Just enough liquid to come halfway up the sides is plenty.
Flavor Variations To Try
Once you master the basic method, experiment with different flavors.
Italian Style
Replace soy sauce with balsamic vinegar. Add canned tomatoes, oregano, and basil. Serve over pasta or with crusty bread.
Asian Inspired
Add ginger, sesame oil, and a splash of rice vinegar. Garnish with green onions and sesame seeds. Serve with steamed rice.
Spicy Version
Add chipotle peppers in adobo sauce or red pepper flakes. Use a smoky broth. Serve with cornbread or rice.
Classic Pot Roast Style
Add carrots, potatoes, and celery. Use a packet of onion soup mix along with the broth. This gives a hearty, comforting flavor.
What To Serve With Slow Cooker London Broil
This dish pairs well with many sides. Here are some ideas.
- Mashed potatoes or roasted potatoes
- Steamed green beans or roasted broccoli
- A simple green salad with vinaigrette
- Crusty bread to soak up the sauce
- Buttered egg noodles or rice
How To Store And Reheat Leftovers
Leftover London broil is great for sandwiches or salads.
Store sliced meat in an airtight container with some cooking liquid. It will keep in the fridge for 3-4 days.
To reheat, place the meat and sauce in a skillet over medium-low heat. Add a splash of broth if needed. Heat until warmed through. Avoid the microwave, which can dry it out.
You can also freeze the cooked meat for up to 3 months. Thaw overnight in the fridge before reheating.
Frequently Asked Questions
Can I Cook London Broil Without Searing It First?
Yes, you can skip the sear. The meat will still be tender, but it won’t have as much deep, savory flavor. Searing is worth the extra few minutes.
How Do I Know When London Broil Is Done In A Slow Cooker?
The meat is done when it shreds easily with a fork. Internal temperature should reach 190-200°F for maximum tenderness. Use a meat thermometer to check.
Can I Use Frozen London Broil In The Slow Cooker?
It’s not recommended. Frozen meat will take longer to reach a safe temperature, increasing the risk of bacterial growth. Thaw it in the fridge first.
What’s The Best Cut For London Broil In A Slow Cooker?
Top round or flank steak are common. Both work well, but top round is leaner. Flank has more flavor but can be a bit tougher if not sliced correctly.
Can I Add Vegetables At The Beginning?
Root vegetables like carrots and potatoes can be added at the start. Softer vegetables like zucchini or bell peppers should be added in the last hour to prevent mushiness.
Final Thoughts On Slow Cooker London Broil
Cooking a London broil in a slow cooker is a simple way to turn a tough cut into a tender meal. The key is using enough liquid, cooking low and slow, and slicing against the grain.
Don’t be afraid to experiment with different seasonings and liquids. The slow cooker is forgiving, and the results are always rewarding.
With this guide, you can confidently make a delicious London broil that your family will love. Enjoy your meal.