A low and slow approach at 250°F gives London broil a tender texture that high heat cannot achieve. If you want to know how long to cook london broil in oven at 250, the short answer is roughly 60 to 90 minutes for a 2 to 3 pound roast, depending on thickness and your target doneness. This method rewards patience, not speed.
London broil is not actually a cut of beef. It is a cooking method, and the meat is usually top round, flank steak, or a thick shoulder cut. These cuts are lean and full of muscle fibers. Cook them hot and fast, and you get chewy slices. Cook them low and slow, and the fibers relax.
That is why 250°F works so well. The gentle heat breaks down tough tissue without drying out the roast. You still get a nice crust if you sear at the end. Below is a full guide with times, temps, and simple steps.
How Long To Cook London Broil In Oven At 250
The exact time depends on weight and thickness. Use this table as your starting point. Always check with a meat thermometer, not just the clock.
- 1.5 to 2 pounds, 1 inch thick: 45 to 60 minutes
- 2 to 2.5 pounds, 1.5 inches thick: 60 to 75 minutes
- 2.5 to 3 pounds, 2 inches thick: 75 to 90 minutes
- 3 to 4 pounds, 2.5 inches thick: 90 to 110 minutes
These times assume you start with meat at room temperature. Cold meat from the fridge can add 10 to 15 minutes. Also, every oven runs a little different. An oven thermometer helps you confirm the real temp.
Target Internal Temperatures For Doneness
Pull the roast when it hits 5°F below your target. Carryover cooking will finish the job while it rests.
- Rare: 120 to 125°F
- Medium rare: 130 to 135°F
- Medium: 140 to 145°F
- Medium well: 150 to 155°F
- Well done: 160°F and up
For London broil, medium rare is the sweet spot. It stays juicy and slices clean. Well done will taste dry no matter how slow you cook it.
Why 250°F Is The Right Oven Temperature
High heat cooks the outside fast and leaves the inside tough. At 250°F, the heat moves through the meat slowly. This gives the natural enzymes time to soften the muscle fibers.
You also get a more even cook. There is less of a gray band around the edges. The whole roast turns a consistent pink from edge to center.
Low heat also means less moisture loss. The roast shrinks less. You end up with more edible meat per pound.
When 250°F Might Not Be Ideal
If you are short on time, 250°F is not your friend. A 3 pound roast can take over an hour and a half. In that case, use a higher temp like 350°F and slice thin against the grain.
Also, if your roast is thinner than 1 inch, it will cook too fast at 250°F. You may end up with well done meat before you get any browning.
Step-By-Step Cooking Method
Follow these steps for a reliable result every time.
- Take the roast out of the fridge 30 to 45 minutes before cooking. Pat it dry with paper towels.
- Season both sides well with salt and black pepper. You can add garlic powder, onion powder, or dried herbs.
- Preheat your oven to 250°F. Place a wire rack inside a rimmed baking sheet.
- Put the roast on the rack. This keeps it out of the drippings and lets heat move around it.
- Insert a meat thermometer into the thickest part, away from fat and bone.
- Roast uncovered until the internal temp is 5°F below your target.
- Remove from oven and tent loosely with foil. Rest for 10 to 15 minutes.
- Slice thin against the grain. This is the most important step for tenderness.
If you want a browned crust, sear the roast in a hot skillet for 1 to 2 minutes per side before resting. Or broil it for 2 to 3 minutes at the end. Watch it closely so it does not burn.
How To Slice London Broil Correctly
Look at the meat. You will see lines running through it. Those are the muscle fibers. Cut across them, not along them. Short fibers chew easy. Long fibers feel like rubber.
Cut slices about 1/4 inch thick. Angled slices look nice and cover more surface. A sharp knife makes a big difference here.
Common Mistakes To Avoid
Most dry London broil comes from a few simple errors. Avoid these and your roast will turn out fine.
- Cooking to well done. Lean cuts have little fat, so they dry out fast.
- Skipping the rest. Resting lets juices redistribute. Cut too soon and they run out.
- Slicing with the grain. This makes even tender meat feel tough.
- Not using a thermometer. Guessing leads to overcooked meat.
- Opening the oven often. Each peek drops the temp and adds time.
Another common issue is using a cold roast. Let it sit out before cooking. It cooks more evenly and the times above will be more accurate.
Do You Need To Marinate First
A marinade is not required, but it helps. An acidic marinade with vinegar, lemon juice, or wine can tenderize the surface. Soak the roast for 4 to 24 hours in the fridge.
If you marinate, dry the meat before roasting. Wet meat steams instead of roasts. You want a dry surface for better texture.
A dry rub works too. Salt, pepper, paprika, and a little brown sugar give good flavor. The sugar helps with browning at low heat.
Resting And Storing Leftovers
Rest the roast for at least 10 minutes. For a large 3 pound cut, go 15 minutes. The internal temp will rise about 5°F during this time.
Slice only what you plan to eat. Whole meat stays juicier in the fridge. Store leftovers in an airtight container for 3 to 4 days.
To reheat, use a low oven or a skillet with a splash of broth. Microwaving on high will make it tough. Keep the heat gentle.
What To Serve With London Broil
This roast pairs with almost anything. Try mashed potatoes, roasted carrots, or a simple green salad. A chimichurri or horseradish sauce adds a nice kick.
Leftover slices make great sandwiches. Pile them on crusty bread with mustard and cheese. You can also chop them into a stir fry or wrap.
Final Tips For Perfect Results
Low and slow is the way to go for this cut. Set your oven to 250°F, use a thermometer, and pull the meat at the right temp. Rest it, then slice against the grain.
If you remember only one thing, remember this. The clock is a guide, but the thermometer is the truth. Every roast is a little different. Trust the temp, not the timer.
With this method, you will get tender, juicy slices every time. No chewy steak, no dry edges. Just good beef that tastes like you spent hours on it, even though the oven did most of the work.