This oven method transforms flank steak into tender, flavorful slices with minimal effort. The key is a high-heat sear followed by gentle roasting to break down the fibers.
Roasted garlic and herbs infuse the meat with depth, while proper slicing ensures every bite is perfectly tender. It’s a foolproof way to achieve restaurant-quality results at home.
Ingredients for Flank Steak Recipe Oven
Quality cuts and bold aromatics deliver restaurant-worthy results with minimal effort.
| Ingredient | Amount | Notes |
|---|---|---|
| Flank Steak 🥩 | 2 lb | Whole, trimmed of excess fat |
| Garlic Cloves 🧄 | 8 cloves | Peeled, whole for roasting |
| Extra-Virgin Olive Oil 🫒 | 3 tbsp | Divided for searing and roasting |
| Kosher Salt 🧂 | 2 tsp | Diamond Crystal preferred for even seasoning |
| Freshly Ground Black Pepper 🌶️ | 1 tsp | Coarse grind for texture |
| Fresh Rosemary Sprigs 🌿 | 3 whole | Woody stems removed |
| Fresh Thyme Sprigs 🍃 | 4 whole | Stems intact for roasting |
| Unsalted Butter 🧈 | 2 tbsp | For basting during roasting |
| Red Wine Vinegar 💧 | 1 tbsp | For finishing acidity |
| Dijon Mustard 🟡 | 1 tbsp | For depth in marinade |
| Beef Broth 🥣 | ½ cup | Low-sodium preferred for control |
| Soy Sauce 🥢 | 2 tbsp | For umami enhancement |
| Brown Sugar 🟤 | 1 tbsp | Light or dark for caramelization |
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The flank steak must be fresh with good marbling—look for USDA Choice or Prime at Whole Foods or a trusted butcher. Avoid pre-cut or pre-marinated steaks, as they often lack the texture needed for proper searing. The garlic should be firm, unblemished cloves (the paper skins should be dry, not damp). Fresh herbs from the produce section outperform dried every time for this application.
No fresh rosemary? Dried at one-third the amount works, but add it during the sear to prevent burning. Balsamic vinegar can replace red wine vinegar for a sweeter note. If avoiding soy, coconut aminos provide similar umami. For a deeper caramelization, swap brown sugar for maple syrup (use 1.5 tbsp). The beef broth can be homemade or Better Than Bouillon for intensity.
Store raw steak on the bottom shelf for 1-2 days max. Roasted garlic keeps in oil for 1 week refrigerated. Leftovers slice thin against the grain and reheat gently in broth to maintain tenderness. Freeze cooked steak for up to 3 months in airtight portions.
Why You’ll Love This Recipe
- Hands-Off Cooking: I toss the flank steak with olive oil, garlic, salt, and pepper, then let the oven do all the work.
- Garlic-Infused Bite: The roasted garlic cloves mellow into this rich, savory depth that soaks right into the meat.
- Weeknight Hero: Honestly, it’s my go-to for busy Tuesdays when I need dinner fast but still impressive.
- Leftovers Luxe: The sliced steak reheats beautifully for next-day tacos or salads—I always make extra.
Step-by-Step Instructions for Flank Steak Oven
Master this technique for perfectly tender slices with herb-infused roasted garlic flavor.
Step 1: Marinate the Flank Steak with Aromatics
In a large bowl, whisk together 3 tbsp extra-virgin olive oil, 2 tbsp soy sauce, 1 tbsp Dijon mustard, 1 tbsp brown sugar, 2 tsp kosher salt, and 1 tsp freshly ground black pepper until the brown sugar dissolves completely. This creates a balanced marinade with sweet, salty, and umami depth.
Add the 2 lb flank steak to the bowl and turn to coat evenly on all sides. I find that piercing the steak lightly with a fork helps the marinade penetrate more effectively. Let it sit at room temperature for 20 minutes while you preheat the oven.
Step 2: Sear and Prepare the Herb-Garlic Roasting Environment
Preheat your oven to 400°F. Heat an oven-safe skillet or roasting pan over medium-high heat. Remove the flank steak from the marinade (reserve the marinade) and sear for 2-3 minutes per side until deeply browned. This creates a flavorful crust that locks in juices.
While the steak sears, arrange the 8 cloves garlic cloves, 3 whole fresh rosemary sprigs, and 4 whole fresh thyme sprigs in the pan. These will infuse the meat with aromatic flavors during roasting. Transfer the seared steak to the pan with the herbs and garlic.
Step 3: Roast with Basting for Maximum Tenderness
Pour the reserved marinade and 0.5 cup beef broth into the pan around the steak. Add 2 tbsp unsalted butter to the liquid. Place the pan in the preheated oven and roast for 15-20 minutes for medium-rare, basting the steak with the pan juices every 5 minutes.
The steak is done when an instant-read thermometer inserted into the thickest part reads 130-135°F for medium-rare. Look for the juices to run clear and the meat to feel slightly springy to the touch. The basting ensures even cooking and adds layers of flavor from the herbs and garlic.
Step 4: Rest and Finish with Acid for Balance
Transfer the flank steak to a cutting board, tent loosely with foil, and let it rest for 10 minutes. This crucial step allows the juices to redistribute throughout the meat, ensuring every slice is moist and tender.
After resting, drizzle the steak with 1 tbsp red wine vinegar and let it sit for 2 minutes before slicing. The acidity brightens the rich flavors and cuts through the fat. Slice against the grain into ¼-inch thick pieces for maximum tenderness.
Pro Tips For Making Flank Steak Recipe Oven
- Preheat the Pan: Get your oven-safe skillet screaming hot—about 5 minutes at 450°F—before adding the steak to guarantee a good sear.
- Score the Steak: Lightly slice the flank steak against the grain in a diamond pattern before cooking; it keeps it from curling and helps the garlic and oil penetrate.
- Don’t Overcrowd: If your pan isn’t big enough for the whole steak, cook it in batches—steaming from overcrowding turns your sear into a sad boil.
- Rest Before Slicing: Let the steak rest under foil for at least 10 minutes after baking; I learned this the hard way when all the juices ended up on the cutting board instead of in the meat.
Regional Styles of This Dish
Texas Style
This Lone Star approach leans into bold, smoky flavors. I rub the steak with a mix of 2 tbsp chili powder, 1 tbsp cumin, and 1 tsp smoked paprika before searing. Use mesquite wood chips in the oven for an authentic touch. 🔥
Argentinian Chimichurri
After roasting, top with fresh chimichurri sauce made from 1 cup parsley, 4 garlic cloves, ¼ cup red wine vinegar, and ½ cup olive oil. The bright, herby sauce cuts through the richness beautifully. This is how they serve it in Buenos Aires steakhouses.
Asian-Inspired Soy-Glazed
Swap the marinade for a mix of ½ cup soy sauce, 3 tbsp honey, 2 tbsp grated ginger, and 3 minced garlic cloves. Baste with this glaze during roasting and garnish with sesame seeds and sliced scallions before serving.
Mediterranean Herb Crust
Press a crust of chopped fresh oregano, parsley, and breadcrumbs onto the steak before roasting. Add kalamata olives and cherry tomatoes to the pan for a one-pan meal. The herbs create an aromatic crust that’s simply divine.
French Bistro Style
Deglaze the pan with ½ cup red wine after roasting and reduce to make a pan sauce. Stir in 2 tbsp cold butter at the end for a glossy finish. Serve with roasted shallots and mushrooms for a classic bistro presentation. 💛
Nutrition Facts
Frequently Asked Questions
Do I need to marinate the steak first?
Yes, marinating for 20 minutes enhances flavor and tenderness. The recipe’s marinade with soy sauce, mustard, and brown sugar adds depth and helps break down fibers.
What’s the ideal internal temperature?
Aim for 130-135°F for medium-rare. Use an instant-read thermometer to check the thickest part, then rest the steak for 10 minutes before slicing.
Can I use a different cut of meat?
Skirt steak works well as a substitute. Avoid tougher cuts like chuck, as they won’t achieve the same tenderness with this oven method.
How do I slice it for maximum tenderness?
Slice against the grain into ¼-inch thick pieces. This shortens muscle fibers, making each bite easier to chew and more enjoyable.
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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