Achieving juicy flank steak with a caramelized crust in the oven requires precision, not luck. This method delivers restaurant-quality results without the grill.
I developed this technique after years of testing in my Boston apartment kitchen, focusing on even heat distribution and proper resting. The oven’s dry heat creates a perfect sear while maintaining tenderness.
The secret lies in high-temperature roasting and strategic seasoning. A simple rub of salt, pepper, and garlic powder enhances the beef’s natural flavors without overwhelming it.
You’ll end up with perfectly cooked steak that slices beautifully, with a richly browned exterior and juicy, flavorful interior. Serve against the grain for maximum tenderness.
Ingredients for Flank Steak Recipe Oven Roasted
A few quality ingredients and high heat deliver that perfect crust and juicy interior.
| Ingredient | Amount | Notes |
|---|---|---|
| Flank Steak 🥩 | 2 lb | About 1 inch thick, trimmed |
| Kosher Salt 🧂 | 2 tsp | Diamond Crystal preferred for even coverage |
| Coarse Black Pepper 🌶️ | 1 ½ tsp | Freshly cracked for maximum flavor |
| Garlic Powder 🧄 | 1 ½ tsp | Not garlic salt, for consistent texture |
| Olive Oil 🫒 | 2 tbsp | High smoke point variety like light olive oil |
| Unsalted Butter 🧈 | 2 tbsp | For basting during roasting |
| Fresh Rosemary 🌿 | 2 sprigs | Optional but recommended for aroma |
| Fresh Thyme 🍃 | 4 sprigs | Optional but enhances flavor depth |
| Red Wine Vinegar 🍷 | 1 tbsp | Balances richness of the beef |
| Dijon Mustard 🟡 | 1 tbsp | For crust development and tang |
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The steak is everything here. Flank steak from Whole Foods or Market Basket has consistent thickness and good marbling. Look for pieces that are uniformly 1-1.5 inches thick—avoid the tapered ends. Costco also carries great flank steak in bulk if you’re feeding a crowd (or just want leftovers). Bring it to room temp before seasoning so the salt penetrates evenly.
No garlic powder? Fresh minced garlic at double the amount works but can burn in the high heat. Swap Dijon for whole-grain mustard if that’s what you have. The herbs are optional but fresh rosemary and thyme add that restaurant-quality aroma. If using dried, cut the amount by half. The vinegar might seem odd, but it’s the secret to balancing the richness.
Let the steak rest 10-15 minutes before slicing—this keeps it juicy. Leftovers? Slice thin and use for sandwiches within 3-4 days. Freezes beautifully for up to 3 months (vacuum seal if you can). Always slice against the grain, even when reheating.
Why You’ll Love This Recipe
- One Pan Wonder: I just rub the flank steak with olive oil, salt, pepper, and garlic powder, then roast—no marinating, no fuss.
- Ridiculously Good: That crust from the coarse pepper and garlic powder? It’s the reason I make this every other week.
- Feeds a Crowd: Honestly, it’s my go-to for Sunday dinner—one pound stretches far, and everyone cleans their plate.
- Leftovers Gold: The slices reheat beautifully for tacos or salads, so I always double the batch.
Step-by-Step Instructions for Oven Roasted Flank Steak
This foolproof method delivers juicy slices with a caramelized crust every time.
Step 1: Season and Marinate the Flank Steak
Pat the 2 lb flank steak dry with paper towels to ensure a good sear. In a small bowl, mix the 2 tsp kosher salt, 1.5 tsp coarse black pepper, 1.5 tsp garlic powder, 2 tbsp olive oil, 1 tbsp red wine vinegar, and 1 tbsp Dijon mustard until smooth.
Rub this mixture all over the steak, pressing it into every crevice. The vinegar and mustard tenderize the meat while building a flavorful crust. Let it sit at room temperature for 20-30 minutes to absorb the seasonings and come to temperature.
Step 2: Preheat and Prepare the Roasting Pan
Position a rack in the center of your oven and preheat to 400°F. While the oven heats, place the 2 sprigs fresh rosemary and 4 sprigs fresh thyme in the bottom of a roasting pan. These herbs will infuse the meat with subtle aroma as it roasts.
Place a wire rack over the herbs to elevate the steak, allowing hot air to circulate underneath for even cooking. The herbs aren’t just for flavor—they also prevent the steak from sticking to the pan.
Step 3: Sear and Begin Roasting
Heat a large oven-safe skillet over high heat until smoking. Add the steak and sear for 2-3 minutes per side until deeply browned. This creates the caramelized crust promised in the title.
Transfer the seared steak to the wire rack in your roasting pan. Place the 2 tbsp unsalted butter on top of the steak so it melts and bastes the meat as it roasts. Slide the pan into the oven.
Step 4: Roast to Perfect Medium-Rare
Roast for 10-15 minutes until an instant-read thermometer inserted into the thickest part reads 130-135°F for medium-rare. The internal temperature will rise another 5-10°F as it rests, reaching the ideal 140°F for juicy, tender slices.
Watch for the edges to pull away slightly from the center—that’s your visual cue the steak is nearly done. If you prefer medium, aim for 140°F internal temperature before resting.
Step 5: Rest and Slice Against the Grain
Transfer the steak to a cutting board and tent loosely with foil. Let it rest for 10-15 minutes—this is non-negotiable for juicy results. The juices redistribute through the meat during this time, so skipping it means dry slices.
Slice thinly against the grain at a slight angle. Look for the natural lines running through the meat (the grain) and cut perpendicular to them. This shortens the muscle fibers, ensuring each bite is tender. Serve immediately with any accumulated juices spooned over the top.
Pro Tips For Making Flank Steak Recipe Oven Roasted
- Preheat the Pan: Get your oven and pan screaming hot—450°F minimum—to sear the flank steak properly before roasting. I learned this the hard way after pulling out gray, sad steaks from a lukewarm oven.
- Score the Steak: Make shallow cuts against the grain on both sides of the flank steak before seasoning. This helps the salt and garlic powder penetrate and makes slicing later a breeze.
- Don’t Overcrowd: Give the steak space in the pan—no cramming. If it’s too close, it’ll steam instead of sear, and you’ll lose that crust you worked for.
- Rest Before Slicing: Let it rest under foil for at least 8-10 minutes after roasting. I used to slice right away and watched all the juices run onto the cutting board—now I wait, even when I’m hungry.
Serving Suggestions for flank steak recipe oven roasted
Plating Like a Pro
Fan those beautiful slices across a warm platter, slightly overlapping. I love using my white stoneware platter from the Italian deli on Hanover Street—it makes the steak look like it came from a Boston bistro. Spoon any accumulated juices from the cutting board over the top for extra gloss. 💫
Herb Garnish
Sprinkle with chopped fresh rosemary and thyme leaves for a pop of color and aroma. A quick sprinkle of flaky sea salt like Maldon adds a final gourmet touch. The herbs echo the ones we used during roasting, tying the flavors together beautifully.
Sauce Pairings
Serve with chimichurri on the side for dipping—it cuts through the richness perfectly. For a simpler option, mix 2 tbsp olive oil with 1 tbsp red wine vinegar and a pinch of Dijon mustard from our ingredient list for a quick pan sauce.
Side Dish Ideas
Pair with roasted fingerling potatoes and sautéed garlic spinach for a complete meal. The earthy potatoes soak up the steak juices, while the spinach adds a fresh contrast. I always make extra—leftovers are fantastic in sandwiches the next day.
Family Style
For a casual Boston-style dinner, serve the sliced steak directly from the cutting board. Let everyone build their own plates with sides. This is how we did it growing up in my Irish-Italian family—no fuss, just great food and better company.
Nutrition Facts
Frequently Asked Questions
What temperature should I use for oven roasting?
Preheat to 400°F for the perfect balance of sear and even cooking. This high heat creates a caramelized crust while keeping the inside juicy.
How do I know when it’s done?
Use a meat thermometer: 130-135°F for medium-rare. The temperature will rise to 140°F while resting, ensuring perfect doneness every time.
Should I slice it before or after resting?
Always rest for 10-15 minutes first. Slicing too soon lets juices escape, leaving you with dry meat. Resting allows flavors to settle and redistribute.
Can I use a different cut of steak?
Skirt steak works well, but avoid thicker cuts like ribeye. Flank’s uniform thickness cooks evenly at high heat. Stick to 1-1.5 inch thick pieces for best results.
Trained in classic French technique but raised on slow-cooked ribs and spicy rubs, she blends culinary skill with smoke and soul.
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