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a platter of mashed potatoes and stuffed flank steak with a serving fork.

Mushroom & Spinach Stuffed Flank Steak Recipe

3.94 from 79 votes
This stuffed flank steak is rolled with tender spinach, savory mushrooms, and creamy goat cheese, creating a show-stopping main dish that’s easier to make than it looks! With juicy, flavorful steak and a colorful, cheesy filling, it’s perfect for holiday meals or dinner parties. 
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Prep Time30 minutes
Cook Time30 minutes
Total Time1 hour
Servings: 6 people
Author: Molly

INGREDIENTS

  • 1 1/2 - 2 lb flank steak
  • Salt and pepper to taste
  • 2-3 tablespoons olive oil divided
  • 8 ounces mushrooms roughly chopped
  • 5 cloves garlic minced
  • 2 cups spinach roughly chopped
  • 2 ounces goat cheese optional

INSTRUCTIONS

  • Preheat oven to 425°F.
  • Butterfly the steak by laying it flat on a cutting board. Starting at the longest end, line your knife up parallel to the cutting board and slice through the center of the steak, stopping just before cutting it all the way through. Open up the flank steak up on the fold.
    1 1/2 - 2 lb flank steak
  • Use a meat tenderizer or mallet to pound the steak to an even thickness, about 1/2 inch thick. Season with salt and pepper on both sides.
    Salt and pepper to taste
  • In a large, oven-safe skillet, like a cast-iron skillet, heat 1-2 tablespoons of olive oil over medium heat. Add the mushrooms and cook, stirring occasionally, for 5-7 minutes until softened and slightly browned. Add the garlic and cook for another 2 minutes until fragrant. Stir in the spinach then quickly remove from the heat. Spread mushroom and spinach mixture evenly over the seasoned beef and sprinkle evenly with goat cheese.
    2-3 tablespoons olive oil, 8 ounces mushrooms, 5 cloves garlic, 2 cups spinach, 2 ounces goat cheese
  • Roll the steak with the grain (the lines in the meat). Roll the steak tightly, tucking in any loose pieces as you roll.
  • Tuck int the ends of the steak as they're thinner and won't cook evenly. Use cooking twine to snugly loop and tie the twine along the steak so its tight enough to hold it together. You can also use several toothpicks if you don’t have twine.
  • Add 1 more tablespoon of olive oil to oven-safe skillet and heat over high heat. When the oil starts to ripple, carefully place the rolled and stuffed flank steak in the pan and sear for 2 minutes on each side, until deeply golden brown. Transfer the skillet to the oven and bake for 20-25 minutes or until a meat thermometer reads 135°F (medium rare) or reads to your desired doneness. Remove from the oven and allow to rest for 15 minutes before cutting. Cut into 2 inch medallions and serve.

Notes

    • Using a meat tenderizer ensures a tender flank steak. Use a meat mallet to briefly pound each side of the steak. Be careful not to flatten it too much because you’ll need to butterfly it!
    • Let the steak sit out for 20-30 minutes before butterflying for easier slicing.
    • Don’t skip searing the steak. The crust locks in flavor and creates a rich, savory taste.
    • To make this ahead of time, prep the rolled steak and refrigerate for up to 24 hours before cooking.
    • Check out this post all about determining doneness if you want your flank steak more done. I recommend a meat thermometer for accuracy.
    • Store any leftovers in an airtight container for up to 3 days.
    • You can make this ahead of time by wrapping the rolled and stuffed uncooked steak tightly in plastic wrap. Refrigerate the stuffed steak for up to 24 hours or freeze for up to 2 months. Thaw overnight in the fridge before searing and baking.

Nutrition

Serving: 1serving | Calories: 258kcal | Carbohydrates: 2.4g | Protein: 35.7g | Fat: 14.4g | Cholesterol: 95mg | Sodium: 527mg | Fiber: 0.7g | Sugar: 0.8g
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