This Tender Marinated Flank Steak is everything a good steak should be: juicy, deeply flavorful, and grilled to perfection with a rich, savory sauce to finish. With a marinade full of soy sauce, balsamic vinegar, garlic, mustard, and chives, this steak delivers big flavor with minimal effort—perfect for backyard cookouts, dinner parties, or casual weeknights when only steak will do.
Why I Love This Recipe
Flank steak is lean, affordable, and quick to cook—but it shines with a bold marinade and proper grilling technique. This version gets an overnight soak in a flavorful blend that tenderizes the meat while infusing it with umami-rich complexity. The reserved marinade turns into a silky sauce, perfect for drizzling over the sliced steak or spooning onto potatoes or roasted veggies.
For more hearty favorites, check out our Easy Turkey Wings or flavor-loaded Dorito Casserole.
📝 Ingredients
- 2 lbs flank steak
- ½ cup soy sauce
- ⅓ cup vegetable oil
- 2 tbsp dark brown sugar
- ¼ cup Worcestershire sauce
- 1 tsp Dijon mustard
- 4 cloves garlic, minced
- 2 tbsp fresh chives, minced
- 1½ tsp ground black pepper
- 2 tsp balsamic vinegar
🥄 Ingredient Tips & Swaps
- Flank steak: Slice thin against the grain for the most tender bites. Skirt steak is a great substitute.
- Dark brown sugar: Adds depth and helps with caramelization. Light brown sugar works in a pinch.
- Chives: Swap for green onions if needed.
- Make it spicy: Add a pinch of crushed red pepper flakes or a splash of hot sauce to the marinade.
👨🍳 Step-by-Step Instructions
1. Prepare the Marinade
In a large dish or Ziploc bag, whisk together:
- Soy sauce
- Vegetable oil
- Dark brown sugar
- Worcestershire sauce
- Dijon mustard
- Garlic
- Chives
- Black pepper
- Balsamic vinegar
2. Marinate the Steak
Add flank steak and ensure it’s fully coated.
Cover and marinate in the fridge overnight, or at minimum 6–8 hours.
3. Preheat the Grill
Heat your gas or charcoal grill to high heat.
4. Grill the Steak
- Remove steak from marinade and let excess drip off.
- Grill over high heat for 2 minutes per side.
- Reduce heat to medium and cook an additional 7–10 minutes, flipping once, until desired doneness:
- 130°F for medium-rare
- 140°F for medium
- Remove and rest under foil for 5–10 minutes.
5. Make the Sauce
While steak rests:
- Pour ½ of the leftover marinade into a saucepan.
- Simmer for 10 minutes until slightly reduced.
- Remove from heat and set aside.
6. Slice & Serve
Slice steak thinly against the grain.
Serve with a drizzle of the reduced sauce and garnish with extra chives or parsley if desired.
💡 Pro Tips for Perfect Flank Steak
- Always rest the steak before slicing to lock in juices.
- Slice against the grain to maximize tenderness.
- Use a meat thermometer to avoid overcooking—it’s lean and cooks fast.
- Don’t skip the marinade—it’s the key to tender texture and bold flavor.
🍽️ Serving Suggestions
Pair this steak with:
- Roasted potatoes or grilled corn
- Garlic butter green beans or a simple arugula salad
- A crusty baguette to soak up that sauce
- And for starters? Go bold with Beer Cheese Dip
Want to round out your meal with a comfort classic? Try it alongside Instant Pot Lasagna or Sheet Pan Quesadillas.
🧊 Storage & Leftovers
- Fridge: Store sliced steak in an airtight container for up to 4 days.
- Freezer: Wrap tightly and freeze for up to 2 months—slice before freezing for quick thawing.
- Reheat gently in a skillet or microwave with a splash of sauce or beef broth to retain moisture.
🥩 More Meaty Mains You’ll Love
- Easy Turkey Wings – Oven-roasted, juicy, and ultra-flavorful.
- Dorito Casserole – Ground beef meets bold, cheesy crunch.
- Sheet Pan Quesadillas – Weeknight-friendly and family-approved.
- Instant Pot Lasagna – Layered, saucy comfort in half the time.
- Beer Cheese Dip – The ultimate steak-night appetizer.
🔚 Final Thoughts
This Tender Marinated Flank Steak delivers juicy, melt-in-your-mouth bites with a bold, rich marinade that doubles as an unforgettable sauce. It’s a no-fuss, flavor-loaded recipe that proves you don’t need a fancy cut to make a five-star steak dinner at home.
Tried it? Tag @ChefManiac with your grill marks and saucy slices—we’d love to see your take!
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