How to Cook London Broil in The Oven (Juicy & Never Tough)

Knowing how to cook London broil in the oven correctly separates a genuinely satisfying dinner from a frustrating chew-fest. I’ve watched this cut intimidate home cooks for years — and it shouldn’t. London broil (most commonly top round or flank steak) is an economical, protein-dense cut with a bold, beefy flavor that rewards the right technique with exceptional results. The wrong technique produces something tough enough to re-sole a boot. The difference comes down to three things: oven temperature, internal temperature at pull, and how you slice it after resting. Get those three right and this becomes one of the best weeknight beef dinners in your rotation.

Why You’ll Love This Oven Method

The oven broiler is the ideal environment for London broil — it replicates the intense, direct-radiant heat of a professional grill at 500–550°F (260–288°C), which is exactly what this cut needs. Unlike low-and-slow methods that work for fatty braising cuts, London broil benefits from high heat applied fast. The goal is to cook the exterior quickly enough to trigger Maillard browning before the lean interior has time to overcook and tighten.

This method is a weeknight lifesaver: 12 minutes active cook time, 10 minutes rest, and you’re serving a beautifully seared, medium-rare beef dinner that cost a fraction of a ribeye. It’s the technique, not the cut, doing the work.

What You Need — Equipment & Ingredients

Equipment you need: A broiler-safe rimmed baking sheet or broiler pan, a wire rack that fits inside it, an instant-read thermometer (non-negotiable for this recipe), and a very sharp carving knife or slicing knife. A dull knife drags through the grain rather than cutting cleanly, and dragging damages the muscle fibers you just spent 8 hours carefully tenderizing.

How to Cook London Broil in the Oven — Step by Step

1. Before you start — marinade is not optional. If you haven’t marinated yet, begin with a London broil marinade applied overnight. Top round is too lean and too densely grained to cook successfully without the pre-tenderizing work a marinade does. Cooking unmarinated London broil in the oven at high heat produces a tough, dry result regardless of technique. Make the marinade — it takes 5 minutes and the overnight work is passive.
2. Position your oven rack and preheat. Set your oven rack 4–5 inches below the broiler heating element. This distance is precise: too close (2–3 inches) and the exterior burns before the interior cooks through; too far (6–8 inches) and you lose the intense radiant heat that creates the crust. Set broiler to HIGH and preheat for a full 10 minutes — most oven broilers take this long to reach full operating temperature.
3. Prepare the meat. Remove London broil from the marinade and pat completely dry with paper towels — work methodically across both sides and all edges. Discard the used marinade. Season the dry surface with a light additional pinch of kosher salt and cracked pepper. Brush both sides very lightly with neutral oil (avocado or canola — never olive oil under a broiler, its smoke point is too low). Place on a wire rack set inside a rimmed baking sheet.
4. Broil — first side. Slide the pan under the preheated broiler. Cook undisturbed for 5–6 minutes without opening the oven. You’ll hear an active sizzle — that’s the Maillard reaction building the crust. The surface should develop a deeply browned, mahogany char with some caramelization at the edges from the marinade’s residual sugars. Resist opening the oven; each opening drops broiler temperature by 50–75°F.
5. Flip and broil — second side. Using tongs, flip the meat and return to the broiler for 4–5 minutes. The second side cooks faster because the meat has already begun warming internally. This is where your thermometer becomes essential — start checking internal temperature at the 4-minute mark of the second side.
6. Pull at the right internal temperature. For London broil, the optimal pull temperature is 130–135°F/ 54–57°C for medium-rare, which carries over to 135–140°F/ 57–60°C during rest. At this temperature, the muscle proteins have set enough to hold the juices but haven’t contracted tightly enough to squeeze them out. Pulling at 145°F+ (63°C) — the USDA minimum for beef — produces a noticeably drier, tougher result in this lean cut.
7. Rest — this step is not optional. Transfer the London broil to a cutting board. Place 2 tablespoons of butter on top and tent loosely with foil (not tightly sealed — steam under tight foil softens the crust). Rest for a minimum of 10 minutes. During this period, the temperature gradient across the meat equalizes, and the muscle fibers that contracted under heat begin to relax, allowing the juices that were pushed to the center to redistribute. Cutting immediately wastes everything you just built — the juices run out onto the board rather than staying in the meat.
8. Slice against the grain — the single most important step. Identify the direction of the muscle fibers running through the meat — they run in long, parallel lines. Cut perpendicular to these lines (at 90°, or at a 45° angle for a more dramatic presentation) in slices ¼ inch thick. Cutting against the grain shortens the muscle fiber lengths you’re biting through from 2–3 inches to ¼ inch — this is the mechanical explanation for why identical meat tastes dramatically more tender sliced one direction versus the other.

Pro Tips — Temperature, Timing & The Slicing Secret

Internal Temperature Doneness Guide

Timing by Thickness

Recipe Variations

What to Serve With London Broil

London broil’s lean, intensely savory profile calls for sides that provide either fat, starch, or brightness — or ideally all three across a full plate.

• 🥔
  Garlic herb roasted potatoes — Cubed Yukon Golds roasted at 425°F (220°C) until crispy-edged. The potato starch absorbs the meat juices pooling on the cutting board — don’t waste them. Spoon the juices over the potatoes as a natural pan sauce.
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  Roasted broccolini with lemon — Slightly bitter greens roasted at high heat until the tips are charred. The bitterness resets the palate between bites of savory beef, and the lemon lifts the whole plate with brightness.
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  Caramelized onions — Slow-cooked for 35–40 minutes in butter until deeply amber and sweet. The caramelized sugars in the onions mirror the Maillard browning on the beef, creating a cohesive flavor story across the plate.
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  Beef broth pan sauce — Pour ½ cup low-sodium beef broth into the baking sheet after removing the meat. Place the baking sheet over a burner, scrape up any fond, add a splash of balsamic vinegar, reduce by half, swirl in 1 tablespoon of cold butter off heat. A 4-minute sauce that elevates the whole dish.

Storage & Meal Prep

Nutritional Information

Per serving (approx. 5 oz cooked London broil, broiled, no sauce), approximate values:

Common Mistakes to Avoid

FAQs

Once you understand how to cook London broil in the oven — marinade overnight, broil hot and fast, pull at medium-rare, rest ten minutes, slice thin against the grain — this becomes one of the most reliable and impressive-to-serve weeknight beef dinners possible. It rewards planning, not skill. Do the prep work, respect the temperatures, and this cut will never disappoint you again.