If you’re looking for a simple and reliable way to prepare a great cut of beef, learning how to cook flank steak oven is a fantastic skill. This method is straightforward and delivers a tender, flavorful result perfect for weeknights or special occasions.
Flank steak is a lean, budget-friendly cut known for its bold beefy flavor. Because it’s lean, it can become tough if not cooked properly. The oven, often overlooked for this cut, provides a controlled environment that, with the right technique, yields a perfectly cooked steak with a beautiful crust. This guide will walk you through every step.
How To Cook Flank Steak Oven
This is the core method for a perfect oven-cooked flank steak. The key is high heat and precise timing. We’ll start with the most crucial step: preparation.
Essential Ingredients and Tools
You don’t need much to get started. Here’s what to gather:
- Flank Steak: Typically 1.5 to 2 pounds. Look for one with even thickness and good marbling.
- Oil: A high-smoke-point oil like avocado, canola, or grapeseed oil.
- Kosher Salt and Black Pepper: The foundation of any good seasoning.
- Additional Seasonings: Garlic powder, onion powder, or smoked paprika are great choices.
- A Heavy Oven-Safe Skillet: Cast iron is ideal for searing and then going into the oven.
- Tongs and an Instant-Read Thermometer: Essential tools for handling and checking doneness.
Step 1: Preparing Your Flank Steak
Good preparation sets the stage for success. Take your steak out of the refrigerator at least 30 minutes before cooking. This allows it to come to room temperature, which promotes even cooking.
While it’s resting, pat it completely dry with paper towels. Moisture is the enemy of a good sear. Then, trim any excess silver skin or thick fat from the surface.
Step 2: Seasoning Generously
Don’t be shy with the seasoning. Drizzle a light coat of oil over both sides of the steak. This helps the seasoning stick and promotes browning.
Season liberally with kosher salt and freshly ground black pepper. Add any other dry rub seasonings you like at this stage. Press the seasoning into the meat to ensure it adheres.
Step 3: Preheating Your Pan and Oven
This step is non-negotiable for a proper crust. Place your heavy, oven-safe skillet on the stove over medium-high heat. Let it get hot for a good 5 minutes.
Simultaneously, preheat your oven to a high temperature. We recommend 400°F (200°C) for a balance of searing and roasting. The hot pan and hot oven work together to cook the steak efficiently.
Step 4: Searing for Maximum Flavor
Carefully place the seasoned flank steak in the hot, dry skillet. You should hear an immediate sizzle. Do not move it for 3-4 minutes.
This allows a deep brown crust to form. Use your tongs to peek if needed. After 3-4 minutes, flip the steak. It should release easily if a crust has formed. Sear the other side for another 3 minutes.
Step 5: Finishing in the Oven
Immediately transfer the entire skillet to your preheated oven. The exact time will vary based on your steak’s thickness and desired doneness.
For a 1-inch thick steak, this usually takes 5 to 10 minutes. This gentle oven heat cooks the interior evenly without burning the exterior you worked so hard to create.
Step 6: Checking Temperature and Resting
This is the most important step for a tender result. Use an instant-read thermometer to check the internal temperature. Aim for:
- 130-135°F (54-57°C) for Medium-Rare
- 140-145°F (60-63°C) for Medium
Flank steak is best served at medium-rare to medium. Any more done and it can become chewy.
Once it hits your target temperature, remove the skillet from the oven. Transfer the steak to a cutting board. Let it rest for 10 full minutes. This allows the juices to redistribute. If you skip this, the juices will run out on the plate.
Step 7: Slicing Against the Grain
Look at the steak. You’ll see long muscle fibers running lengthwise—this is the “grain.” Using a sharp knife, slice the steak thinly, perpendicular (across) these fibers.
Slicing against the grain shortens these tough muscle fibers, making every bite much more tender. It’s a simple trick that makes a huge difference.
Pro Tip: The Broiler Finish Option
If you want an even more intense crust, you can use your oven’s broiler. Preheat the broiler on high with a rack placed 4-6 inches from the element.
Place the seasoned steak on a broiler pan or a wire rack set in a baking sheet. Broil for 5-7 minutes per side, watching closely to prevent burning, until the desired temperature is reached.
Marinades and Flavor Variations
While a simple salt and pepper steak is delicious, flank steak absorbs marinades wonderfully. Marinating for at least 2 hours, or up to 12 hours, can add incredible flavor and tenderize slightly.
Classic Soy-Ginger Marinade
- 1/3 cup soy sauce
- 1/4 cup oil
- 2 tbsp honey or brown sugar
- 2 cloves garlic, minced
- 1 tbsp fresh grated ginger
- Juice of one lime
Simple Chimichurri Style
- 1/2 cup fresh parsley, finely chopped
- 3 cloves garlic, minced
- 2 tbsp red wine vinegar
- 1/4 cup olive oil
- 1 tsp dried oregano
- Salt and pepper to taste
Combine your chosen marinade ingredients in a bowl. Place the steak and marinade in a large zip-top bag, press out the air, and seal. Refrigerate, turning occasionally. Before cooking, remove the steak from the marinade and pat it very dry—this is crucial for browning.
Common Mistakes to Avoid
Even small errors can affect your final dish. Here’s what to watch out for:
- Skipping the Dry Step: Not patting the steak dry or adding a wet marinade to a hot pan prevents searing.
- Moving the Steak Too Soon: Let the steak sear undisturbed to build that flavorful crust.
- Overcooking: Flank steak is lean and becomes tough past medium doneness. Trust your thermometer.
- Skipping the Rest: Cutting immediately lets all the flavorful juices escape, leaving a drier steak.
- Slicing With the Grain: This makes the steak seem stringy and much tougher to chew.
Serving Suggestions
Your perfectly cooked flank steak is versatile. Here are some ideas for what to serve with it:
- Classic Sides: Garlic mashed potatoes, roasted vegetables (like asparagus or broccoli), or a crisp green salad.
- For Tacos or Fajitas: Slice it thin and serve with warm tortillas, salsa, guacamole, and lime wedges.
- In Salads: Add slices to a big salad with romaine, cherry tomatoes, red onion, and a bold vinaigrette.
- Sandwiches: Pile slices on a crusty roll with horseradish sauce or caramelized onions.
Storing and Reheating Leftovers
Leftover flank steak is a great to have. Store cooled slices in an airtight container in the refrigerator for up to 3 days.
To reheat, avoid the microwave if you can—it can make the meat rubbery. Instead, gently warm slices in a skillet over low heat with a splash of broth or water, or enjoy them cold in salads.
Frequently Asked Questions (FAQ)
What is the best temperature to cook flank steak in the oven?
A high oven temperature, between 400°F to 425°F (200°C to 220°C), is best. This allows you to get a good sear on the stove and then finish cooking quickly and evenly in the oven without drying it out.
How long should you cook flank steak in the oven?
After searing, the oven time is relatively short. For a 1 to 1.5-inch thick steak, expect 5 to 10 minutes in a 400°F oven to reach medium-rare. Always use a meat thermometer for accuracy, as oven temperatures can vary.
Do you have to sear flank steak before putting it in the oven?
It is highly recommended. Searing creates the Maillard reaction, which gives the steak its rich, complex flavor and appealing brown crust. While you can cook it entirely under the broiler, the stovetop sear offers more control.
How do you keep flank steak from getting tough?
Three things prevent toughness: don’t overcook it (use a thermometer), always slice it thinly against the grain, and let it rest after cooking. A marinade can also help tenderize the surface slightly.
Can you cook a flank steak in the oven without searing first?
You can, but the results will be different. Using the broiler method described above can give you a similar charred effect. However, the stovetop sear typically provides a more consistent and deeply flavored crust.
What internal temperature should flank steak be?
For the most tender and juicy results, aim for an internal temperature of 130-135°F (54-57°C) for medium-rare, or 140-145°F (60-63°C) for medium. The temperature will rise a few degrees during the resting period.
Final Tips for Success
Mastering how to cook flank steak oven is about technique. Remember, a hot pan, a preheated oven, and an instant-read thermometer are you’re best tools. Don’t rush the sear or the rest.
Experiment with different dry rubs or marinades to find your favorite flavor profile. With this reliable method, you can consistently prepare a flavorful, tender flank steak that will impress at any meal. The process is simple, but the results feel special every time.