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A skillet of sliced flank steak and mushrooms next to roasted asparagus.
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5 from 1 vote

Grilled Flank Steak with Mushrooms

Grilled Flank Steak with Mushrooms is a delicious and flavorful recipe that you're going to love. With marinated beef, Baby Bella mushrooms, fresh herbs, and lemon, it's a savory, satisfying dinner that is perfect for a date night in or for a family dinner!
Prep Time15 minutes
Cook Time20 minutes
Additional Time2 hours
Total Time2 hours 35 minutes
Course: Main Course
Cuisine: American
Servings: 6 -8 servings
Author: Amy Nash

Ingredients

Marinade

  • 1/3 cup soy sauce
  • 2 Tablespoons balsamic vinegar
  • 1/4 cup olive oil
  • 4 cloves minced garlic
  • 1 teaspoon ground ginger
  • 1 teaspoon black pepper
  • 1/2 teaspoon salt
  • Juice of 1 lemon about 1/4 cup

Steak & Mushrooms

  • 1 flank steak about 1 1/2 to 2 pounds
  • 16 ounces baby bella mushrooms cut in half or quarters if large
  • 2 Tablespoons salted butter
  • 2 cloves minced garlic
  • 1 Tablespoon olive oil
  • Salt and pepper
  • 1 Tablespoon fresh rosemary chopped
  • 1 cup beef broth divided
  • 1 teaspoon cornstarch

Instructions

  • Combine marinade ingredients and add to steak. Marinate at least 2 and up to 24 hours.
    1/3 cup soy sauce, 2 Tablespoons balsamic vinegar, 1/4 cup olive oil, 4 cloves minced garlic, 1 teaspoon ground ginger, 1 teaspoon black pepper, 1/2 teaspoon salt, Juice of 1 lemon, 1 flank steak
  • Grill over high heat for 6 minutes per side until 120-125°F for rare and 130-140°F for medium-rare.
  • Let it rest for 10 minutes before thinly slicing against the grain.
  • Combine 2 tablespoons beef broth with cornstarch to make a slurry.
    1 cup beef broth, 1 teaspoon cornstarch
  • Add mushrooms to a hot dry pan and cook 2-3 minutes. Season with salt and pepper.
    16 ounces baby bella mushrooms, Salt and pepper
  • Add butter, garlic, rosemary, and olive oil.
    2 Tablespoons salted butter, 2 cloves minced garlic, 1 Tablespoon fresh rosemary, 1 Tablespoon olive oil
  • Add broth and cook 3-4 minutes.
  • Add slurry, cook until slightly thickened.
  • Slice meat against grain and serve with mushrooms.

Nutrition

Calories: 329kcal | Carbohydrates: 7g | Protein: 28g | Fat: 21g | Saturated Fat: 6g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 12g | Trans Fat: 1g | Cholesterol: 78mg | Sodium: 1163mg | Potassium: 805mg | Fiber: 1g | Sugar: 2g | Vitamin A: 129IU | Vitamin C: 1mg | Calcium: 54mg | Iron: 3mg

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