Cooking London broil in an air fryer is a game-changer for busy home cooks. It’s fast, juicy, and delivers that delicious charred flavor without the hassle of grilling or oven roasting. With the right marinade and timing, you’ll get tender, restaurant-quality results in under 30 minutes.
Key Takeaways
- Marinate for maximum flavor: At least 4 hours (or overnight) in a simple mix of soy sauce, garlic, herbs, and acid like vinegar or lemon juice.
- Air fry at 400°F for best results: This high heat sears the outside while keeping the inside juicy and tender.
- Cook time is 10–15 minutes: Flip halfway through and use a meat thermometer to hit 130–135°F for medium-rare.
- Rest before slicing: Let it rest 5–10 minutes to lock in juices—then slice against the grain.
- Use a meat thermometer: Ensures perfect doneness and prevents overcooking this lean cut.
- Pair with simple sides: Try roasted veggies or a fresh salad to complete the meal.
- Clean your air fryer after: Wipe down the basket to avoid smoke from leftover marinade residue.
📑 Table of Contents
Why Cook London Broil in an Air Fryer?
London broil isn’t actually a cut of meat—it’s a cooking method traditionally used for top round or flank steak. But whatever you call it, this lean, flavorful cut deserves a spot on your weeknight menu. And if you’ve got an air fryer, you’re in luck: cooking London broil in an air fryer is one of the easiest, fastest ways to get tender, juicy results without firing up the grill or heating your whole kitchen.
The air fryer’s rapid hot air circulation mimics the intense heat of grilling, giving you that desirable caramelized crust while keeping the inside moist. Plus, it’s way more convenient—no flipping burgers on a crowded grate or waiting for coals to heat up. Whether you’re feeding a family or just cooking for one, this method delivers consistent, delicious outcomes every time.
Choosing the Right Cut
Before you start cooking, it’s important to pick the right meat. True “London broil” usually refers to a thick slice of top round or flank steak—both are lean, moderately tough cuts that benefit from marinating and quick, high-heat cooking. Top round is slightly more tender and less stringy than flank steak, making it ideal for slicing into clean, even strips. Flank steak has more pronounced grain and bold beefy flavor but can be chewier if not sliced correctly.
What to Look For at the Store
Choose a piece that’s about 1 to 1.5 inches thick, with even marbling and a deep red color. Avoid cuts that look dry or have excessive fat—London broil should be lean. If your butcher offers it, ask for “top round steak” labeled as London broil—it’s often pre-trimmed and ready to marinate. A 1.5-pound cut will feed 3–4 people comfortably.
Marinating for Maximum Flavor
Because London broil is lean, it can dry out quickly if not properly seasoned and marinated. A good marinade does double duty: it tenderizes the meat and infuses it with flavor. You don’t need fancy ingredients—just a few pantry staples will do.
Simple 4-Ingredient Marinade
- ¼ cup soy sauce (or tamari for gluten-free)
- 2 tablespoons olive oil
- 2 cloves garlic, minced
- 1 tablespoon balsamic vinegar or lemon juice
Optional add-ins: Worcestershire sauce, Dijon mustard, fresh rosemary, or a pinch of red pepper flakes for heat. Whisk everything together and pour over the steak in a resealable bag or shallow dish. Marinate for at least 4 hours—but ideally overnight in the fridge. The longer it sits, the more flavorful and tender it becomes.
Cooking London Broil in the Air Fryer: Step-by-Step
Now for the fun part! Cooking London broil in an air fryer is surprisingly simple, but timing and temperature are key. Here’s how to do it right.
Prep Your Air Fryer
Preheat your air fryer to 400°F (200°C) for 3–5 minutes. This ensures even cooking from the first second. While it heats, remove the steak from the marinade and pat it dry with paper towels. Excess moisture prevents browning, so don’t skip this step!
Cook Time and Temperature
Place the steak in the air fryer basket in a single layer—don’t overcrowd. Cook for 6 minutes, then flip and cook another 4–9 minutes, depending on thickness and desired doneness. Use a meat thermometer to check internal temperature:
- Rare: 120–125°F
- Medium-rare: 130–135°F (recommended)
- Medium: 140–145°F
For a 1-inch thick steak, total cook time is usually 10–12 minutes. Thicker cuts may need up to 15 minutes. Remember, the air fryer cooks fast—check early to avoid overcooking.
Resting Is Non-Negotiable
Once done, transfer the steak to a cutting board and let it rest for 5–10 minutes. This allows the juices to redistribute, ensuring every bite is moist and flavorful. Cover loosely with foil to keep it warm while you prep sides.
Slicing and Serving Tips
The secret to tender London broil? Slicing against the grain. Look for the direction of the muscle fibers—they’ll appear as long lines running across the meat. Use a sharp knife to cut perpendicular to those lines into thin slices (about ¼-inch thick). This shortens the fibers, making each bite easier to chew and more enjoyable.
What to Serve With It
Pair your air-fried London broil with simple, fresh sides that won’t compete with its rich flavor. Roasted broccoli, garlic mashed potatoes, or a crisp arugula salad work beautifully. For a complete meal, try serving it over quinoa or with a side of air fryer hash browns—crispy, golden, and ready in minutes.
If you’re feeling adventurous, whip up a quick chimichurri or creamy horseradish sauce to drizzle over the sliced steak. It adds brightness and cuts through the richness of the beef.
Common Mistakes to Avoid
Even with the best intentions, things can go sideways. Here are a few pitfalls to watch out for:
Skipping the Marinade
Don’t rush this step! Without marinating, London broil can turn out tough and bland. Even a 30-minute soak helps, but 4+ hours is ideal.
Overcooking the Meat
Because it’s lean, London broil dries out quickly past medium-rare. Always use a thermometer—don’t rely solely on time. And remember: it’ll continue cooking slightly while resting.
Not Preheating the Air Fryer
Just like an oven, preheating ensures even browning and proper texture. Skipping it can lead to uneven cooking or a steamed instead of seared exterior.
Slicing With the Grain
This is the #1 reason people think London broil is tough. Always slice perpendicular to the muscle fibers for maximum tenderness.
Storage and Reheating
Got leftovers? Store sliced London broil in an airtight container in the fridge for up to 3 days. To reheat, avoid the microwave if possible—it can make the meat rubbery. Instead, warm it gently in a skillet over low heat with a splash of broth or water to restore moisture. Or, pop it back in the air fryer at 350°F for 3–4 minutes until heated through.
You can also freeze cooked London broil for up to 2 months. Wrap slices tightly in freezer paper or place in a freezer-safe bag with parchment between layers to prevent sticking.
Why This Method Beats the Grill
Grilling London broil is classic—but not always practical. Weather, space, and cleanup can be barriers. The air fryer offers a reliable indoor alternative that delivers nearly identical results: a crispy exterior, juicy interior, and minimal hands-on time. Plus, you can cook it year-round, even in winter or apartment living.
And if you’re already using your air fryer for other proteins—like chicken, pork chops, or even ribs—adding London broil to the rotation makes meal planning even easier. It’s a versatile, protein-rich centerpiece that pairs well with almost any side.
Final Thoughts
Cooking London broil in an air fryer is a smart, efficient way to enjoy a hearty steak dinner without the fuss. With a flavorful marinade, proper timing, and a sharp knife for slicing, you’ll impress everyone at the table—including yourself. It’s proof that great meals don’t need complicated techniques or hours in the kitchen.
So next time you’re staring into the fridge wondering what to make for dinner, grab that London broil, fire up your air fryer, and get ready for a delicious, satisfying meal in under 30 minutes. Your taste buds (and your schedule) will thank you.
Frequently Asked Questions
Can I cook frozen London broil in an air fryer?
It’s not recommended. Frozen meat cooks unevenly and won’t marinate properly, leading to dry, tough results. Always thaw London broil in the fridge overnight before cooking.
How do I know when London broil is done?
Use a meat thermometer. Insert it into the thickest part of the steak—130–135°F is ideal for medium-rare. Avoid cutting into the meat to check, as this releases precious juices.
Can I use a different cut of beef?
Yes! Flank steak, skirt steak, or even sirloin can work in a pinch. Just adjust cook time slightly and always slice against the grain.
Why is my London broil tough?
Most likely, it was overcooked or sliced with the grain. Ensure you’re using a thermometer and cutting perpendicular to the muscle fibers for tender bites.
Do I need to flip the steak during cooking?
Yes! Flipping halfway ensures even browning and prevents one side from drying out. Most air fryers circulate heat well, but flipping guarantees consistency.
Can I make this recipe gluten-free?
Absolutely. Use tamari instead of soy sauce and ensure any added sauces (like Worcestershire) are certified gluten-free. The rest of the recipe is naturally GF.
