Learning how to cook a flat iron steak in oven is a fantastic method for achieving a perfectly cooked piece of meat. The oven is excellent for finishing a flat iron steak, ensuring even doneness after an initial sear in a hot pan. This technique gives you great control and is simpler than it might sound.
This guide will walk you through the entire process. You will get clear, step-by-step instructions. We will cover everything from selecting your steak to letting it rest before slicing.
How To Cook A Flat Iron Steak In Oven
This method, often called the sear-and-roast or reverse-sear method, is reliable. It starts with a hot sear on the stove to create a flavorful crust. Then, you transfer the steak to a preheated oven to gently cook it to your desired temperature.
The flat iron steak comes from the shoulder area of the cow. It is known for being tender and full of beefy flavor. Because it is a thinner cut, using the oven helps prevent overcooking the center while the outside gets nicely browned.
What You Will Need
Gathering your tools and ingredients beforehand makes the process smooth. You do not need any special equiptment.
- Flat Iron Steak: Typically 1 to 1.5 inches thick is ideal.
- Oven-Safe Skillet: A cast-iron or heavy stainless steel pan is best.
- Tongs: For safely handling the steak.
- Instant-Read Thermometer: This is crucial for perfect doneness.
- Basic Seasonings: Kosher salt, freshly ground black pepper, and optionally garlic powder or smoked paprika.
- High-Heat Oil: Such as avocado oil, grapeseed oil, or canola oil.
- Butter and Aromatics (Optional): Butter, fresh thyme, or rosemary for basting.
Preparing Your Steak
Proper preparation is the first step to a great result. This involves seasoning and bringing the steak to the right temperature.
Seasoning The Meat
Be generous with your seasoning. About 45 minutes before cooking, pat the steak thoroughly dry with paper towels. This is key for a good sear.
Season all sides liberally with kosher salt and black pepper. You can add other dry rubs if you like. Letting it sit at room temperature for 30-45 minutes helps it cook more evenly in the oven.
Preheating The Oven And Pan
Preheat your oven to 400°F (200°C). Place your empty oven-safe skillet on a stovetop burner over medium-high heat. Let the pan get hot for a good 5 minutes. A properly heated pan is essential for that initial crust.
The Step-By-Step Cooking Process
Now for the main event. Follow these steps closely for a perfectly cooked flat iron steak.
- Sear the Steak: Add a tablespoon of high-heat oil to the hot skillet. It should shimmer immediately. Carefully place the seasoned steak in the center of the pan. Let it sear, undisturbed, for 2-3 minutes until a deep brown crust forms.
- Flip and Sear the Other Side: Use tongs to flip the steak. Sear the second side for another 2-3 minutes. If using, add a couple tablespoons of butter and herbs to the pan at this point.
- Baste (Optional): As the butter melts, tilt the pan and spoon the foaming butter and herbs over the steak repeatedly for about 30 seconds. This adds incredible flavor.
- Transfer to the Oven: Immediately move the entire skillet from the stovetop into your preheated oven. The oven’s ambient heat will finish cooking the interior gently.
- Cook to Temperature: Roast the steak until it reaches your desired internal temperature. This usually takes 5 to 10 minutes, depending on thickness and starting temp. Check it with your thermometer.
- Rest the Steak: Remove the skillet from the oven. Transfer the steak to a cutting board or warm plate. Do not slice it yet. Let it rest for at least 5-8 minutes. This allows the juices to redistribute.
Checking For Doneness
Guessing doneness can lead to over or undercooking. An instant-read thermometer is your best friend. Insert it into the thickest part of the steak.
- Rare: 120-125°F (49-52°C)
- Medium-Rare: 130-135°F (54-57°C) – Recommended for best flavor and tenderness.
- Medium: 140-145°F (60-63°C)
- Medium-Well: 150-155°F (66-68°C)
Remember, the temperature will rise a few degrees during the resting period. This is called carryover cooking. You should account for that when you take it out the oven.
Slicing And Serving Your Steak
After the steak has rested, it’s time to slice it. Always slice against the grain. This means cut perpendicular to the long muscle fibers you can see on the steak.
Slicing against the grain makes each peice much more tender to eat. Serve your sliced steak immediately. It pairs well with simple sides like roasted vegetables, a crisp salad, or mashed potatoes.
Common Mistakes To Avoid
Avoiding these pitfalls will improve your results every time.
- Not Drying the Steak: A wet surface steams instead of sears.
- Using a Cold Pan: The steak will stick and not develop a crust.
- Moving the Steak Too Much: Let it sit undisturbed during searing to form a proper crust.
- Skipping the Rest: Slicing too soon releases all the flavorful juices onto the board.
- Not Using a Thermometer: Relying on time or touch is often inaccurate.
Alternative Oven Cooking Methods
The sear-and-roast method is highly recommended, but there are other ways to use your oven.
Using The Broiler
You can cook the entire steak under the broiler. Place the seasoned steak on a broiler pan or rack set a few inches from the heat. Broil for 5-7 minutes per side, watching closely to prevent burning. A thermometer is still essential here.
The Reverse Sear Method
This flips the process: you cook the steak in a low oven (around 250°F) first until it’s nearly at temperature. Then, you finish it with a very quick, intense sear in a blazing hot skillet. This method can yield incredibly even doneness edge-to-edge.
Frequently Asked Questions
Here are answers to some common questions about cooking flat iron steak.
Can You Cook Flat Iron Steak In The Oven Without Searing First?
You can, but you will miss out on the flavorful Maillard reaction that creates a delicious crust. Searing first in a hot pan provides texture and taste that oven roasting alone cannot achieve. For the best results, always sear first.
What Is The Best Temperature For Flat Iron Steak In The Oven?
A preheated oven temperature of 400°F (200°C) works well for the sear-and-roast method. It is hot enough to continue cooking the steak efficiently without burning the exterior. For a reverse sear, a lower oven temperature of 250°F (120°C) is used.
How Long To Cook Flat Iron Steak In Oven After Searing?
After searing, the time in a 400°F oven typically ranges from 5 to 10 minutes for a 1-inch thick steak to reach medium-rare. However, you should always rely on internal temperature, not time, as steak thickness and oven variances differ.
Should You Cover Steak When Baking In The Oven?
No, you should not cover the steak while it is in the oven. Covering it would create steam and soften the beautiful crust you worked hard to create during the searing stage. Leave it uncovered for the entire roasting time.
How Do You Keep Flat Iron Steak From Getting Tough?
To keep it tender, do not overcook it. Flat iron steak is best at medium-rare or medium. Always slice it thinly against the grain, which breaks up the muscle fibers and makes it easier to chew. Also, make sure you are letting it rest properly before cutting.
Mastering how to cook a flat iron steak in oven is a valuable skill for any home cook. The combination of a stovetop sear and gentle oven finish delivers a restaurant-quality result with minimal fuss. By following these steps—proper seasoning, a hot sear, careful temperature monitoring, and adequate resting—you will consistently produce a juicy, flavorful steak. Remember, the instant-read thermometer is your guide to perfect doneness every single time. Now you’re ready to prepare a fantastic meal.