Broil London broil near the heat, flip once, and use a thermometer for juicy steak with a browned crust and safe, tender center.
London broil has a reputation for turning tough if you treat it like a quick pan steak. Under strong oven broiler heat, though, this lean cut can turn out flavorful, sliced thin, and perfect for feeding a crowd. The goal is simple: strong heat on the surface, controlled time under the broiler, and a careful rest so the meat stays moist instead of chewy.
This guide walks through how to set up the oven broiler, how to prep the meat, how long to broil by thickness, and how to read internal temperature so your London broil lands at the doneness you prefer while still meeting food safety rules.
What Makes London Broil Perfect For The Oven Broiler
London broil is not a single cut; the label often covers flank steak, top round, or similar lean beef. What they share is a coarse grain and moderate fat. That grain can feel tough if you cook the meat too long or slice it with the fibers instead of against them. The broiler helps, because it sends strong direct heat that browns the surface fast while the interior climbs more slowly.
For broiling, look for a steak about 1 to 1½ inches thick. Thinner pieces cook so fast that the center moves past medium before the surface browns, while thicker roasts behave more like oven roasts and need longer timing than most home cooks expect. A uniform piece, trimmed of large surface fat and silverskin, gives steadier results.
The chart below gives ballpark total broil times based on thickness and final doneness. Times assume an electric or gas broiler on high, an oven rack about 4 to 6 inches from the element, and a preheated broiler pan or heavy sheet pan.
| Steak Thickness | Target Doneness | Approx. Broil Time (Total) |
|---|---|---|
| 1 inch | Medium rare | 8–10 minutes |
| 1 inch | Medium | 10–12 minutes |
| 1 inch | Medium well | 12–14 minutes |
| 1¼ inches | Medium rare | 12–14 minutes |
| 1¼ inches | Medium | 14–16 minutes |
| 1½ inches | Medium rare | 14–16 minutes |
| 1½ inches | Medium | 16–18 minutes |
These times give a starting point. Oven broilers vary, so always use a meat thermometer and treat time as a rough guide, not the final word.
Cooking London Broil In Oven Broiler For Tender Steak
When you plan on cooking london broil in oven broiler for dinner, think in three stages: flavor the meat, set up the broiler correctly, then cook by internal temperature rather than time alone. The broiler caramelizes the surface, but tenderness comes from how you slice the meat and how long it rests after cooking.
Many home cooks assume that cooking london broil in oven broiler always leads to dry beef. In practice, most problems trace back to overcooking, skipping the rest, or slicing the meat with the grain. Fix those three points and the same cut becomes a weeknight favorite that feels suited to company as well.
Prep Steps: Selecting And Marinating The Steak
Start with a cut labeled London broil, top round steak, or flank. Aim for 1¼ inches thick if you can find it. Pat the meat dry with paper towels so the surface can brown under the broiler rather than steam.
A marinade helps with flavor and surface tenderness. Use an acid, such as red wine vinegar, lemon juice, or balsamic, plus oil, salt, and aromatics. Garlic, onion, dried herbs, cracked pepper, soy sauce, and a touch of brown sugar all work well. Place the steak in a shallow dish or zipper bag, coat it with the mixture, and chill it for at least 2 hours, up to 12 hours. Longer contact with salt lets the seasoning move slightly below the surface.
Before broiling, take the meat out of the fridge for about 30 minutes so it comes a bit closer to room temperature. This helps it cook more evenly from edge to center. Discard used marinade or boil it thoroughly before serving it as a sauce, since it held raw meat juices.
Setting Up The Oven Broiler
Place the oven rack so the top of the steak will sit about 4 to 6 inches from the broiler element. With gas, that means fairly high. With electric, aim for the second or third slot from the top, then adjust over time as you see how hot your unit runs.
Use a broiler pan with a slotted top if you have one. The rack lets fat drip away from the meat and keeps the bottom from stewing. A heavy sheet pan lined with foil and topped with a wire rack also works. Preheat the broiler for 5 to 10 minutes so the element and pan are fully hot before the meat goes in.
While the broiler heats, blot excess marinade from the steak and season both sides with extra salt and pepper if needed. A light film of oil on the surface helps browning and reduces sticking.
Step-By-Step Broiling Method
Once the prep is done, the actual broiling stage moves quickly. Keep a timer and thermometer nearby so you can check progress without guesswork.
- Set the steak on the hot rack or pan, positioning it so the thickest part sits near the center of the heat source rather than the corners of the oven.
- Broil the first side for about half of the time from the chart for your thickness and target doneness. Do not move the steak during this first stage.
- Flip the steak with sturdy tongs. Broil the second side for most of the remaining time, then start checking internal temperature near the center with an instant-read thermometer.
- For medium rare, pull the steak when the thermometer reads around 130–135°F; for medium, pull at 140–145°F. Carryover heat during resting will raise the temperature a few degrees.
- Transfer the meat to a cutting board and tent it loosely with foil. Let it rest at least 5 to 10 minutes so juices can redistribute.
- Slice the steak thinly across the grain at a slight angle. This shortens the tough muscle fibers and makes each bite feel tender.
According to the USDA safe minimum internal temperature chart, whole cuts of beef should reach at least 145°F with a short rest for food safety, even if you prefer the texture of medium rare. Many cooks choose a final temperature near that range to balance tenderness and safety.
Doneness, Internal Temperature, And Resting Time
Because London broil is lean, small differences in temperature change the texture in a big way. A few degrees under your target leaves the center cool and chewy, while a few degrees over can make the whole steak firm and dry. A thermometer takes the guesswork out of broiling and protects the time you spent marinating and seasoning.
The table below summarizes common doneness stages for London broil along with internal temperature targets and simple visual cues. Treat the temperatures as target ranges, not rigid rules, and keep the food safety guidance from the USDA in mind when you plan where to land.
| Doneness Level | Internal Temp Range | Visual Cue |
|---|---|---|
| Rare | 120–125°F | Deep red center, cool to warm, soft texture |
| Medium rare | 130–135°F | Warm red center, plenty of juice, slight spring |
| Medium | 140–145°F | Pink center, clear juices, firmer bite |
| Medium well | 150–155°F | Faint blush in center, small amount of juice |
| Well done | 160°F+ | Brown throughout, tight texture, low moisture |
Pull the steak a few degrees under your goal, then rest it so carryover heat finishes the job. Resting also gives time for the hottest outer layer to even out with the cooler center, which leads to slices that stay moist on the plate.
Why Resting Matters For London Broil
Under broiler heat, the surface of the steak races past the boiling point of water while the center climbs more gradually. If you cut into the meat right after cooking, those hot juices rush out and pool on the board. A short rest lets the fibers relax and reabsorb some of that moisture.
London broil responds well to at least 5 minutes of rest for thinner pieces and up to 10 minutes for thicker 1½ inch steaks. Use that pause to toast bread, slice vegetables, or simmer any pan juices you collected into a quick sauce. Then slice thin across the grain so each bite feels tender even from a lean cut.
Flavor Variations And Meal Ideas For Broiled London Broil
Once you feel comfortable with cooking London broil under the broiler, it turns into a flexible base for many meals. The meat takes on bold flavors from marinades and rubs, and the thin slices stretch nicely across salads, sandwiches, and grain bowls.
Here are a few seasoning ideas that work well with strong broiler heat:
- Garlic and herb: Olive oil, crushed garlic, chopped rosemary or thyme, black pepper, and lemon zest.
- Soy and citrus: Soy sauce, orange or lime juice, grated ginger, a small spoon of brown sugar, and sesame oil.
- Balsamic and mustard: Balsamic vinegar, Dijon mustard, olive oil, minced shallot, and black pepper.
- Chili and lime: Chili powder, smoked paprika, lime juice, and neutral oil for a gentle smoky note.
Serve sliced London broil with roasted potatoes and green beans, pile it over mixed greens with cherry tomatoes and a sharp dressing, or tuck slices into warm rolls with onions and peppers. A simple side salad and crusty bread turn the broiled steak into a balanced plate without much extra effort.
For food safety around leftovers, follow the cooling and storage guidance in the FSIS food safety basics. Chill cooked meat within about 2 hours, store it in shallow containers in the fridge, and reheat slices to at least 165°F.
Make-Ahead, Storage, And Leftover Uses
Broiled London broil works well as a make-ahead protein because thin slices reheat gently and still taste good cold. Cook the steak, rest it, slice across the grain, then store the slices in airtight containers in the fridge for up to three or four days.
To reheat, spread slices in a single layer in a covered dish with a splash of broth and warm them in a low oven, or briefly warm them in a skillet over medium heat. Leftover meat from cooking london broil in oven broiler turns into steak sandwiches with melted cheese, beef and vegetable stir-fries, pasta dishes, or hearty salads. With a little planning, one broiled steak can cover more than one meal without feeling repetitive.
