Flat Iron Steak with Creamy Peruvian Green Sauce (Aji Verde)

A juicy, flavourful flat iron steak recipe for the grill. Learn exactly what flat iron steak is and how to cook it like a pro with my best tips. Top it with this delicious creamy-spicy Peruvian green sauce, called Aji Verde

perfectly grilled flat iron steak

Flat Iron Steak with Creamy Peruvian Green Sauce

Prep Time 10 minutes
Cook Time 8 minutes
Servings 4
Keyword Peruvian Green Sauce


For Sauce

  • ½ cup fresh cilantro
  • ½ cup fresh parsley
  • 3 medium cloves garlic
  • 2 small green chilies (or 1 jalapeno)
  • ½ lime, juiced
  • ¾ tsp coarse salt
  • ¼ cup olive oil
  • cup mayonnaise

For Steak

  • 1 lb boneless blade steak (or skirt or flank steak)
  • 1 tbsp vegetable oil
  • coarse salt and pepper


  • Add all ingredients to a small food processor or blender. Pulse until mixture is fairly smooth but not pureed.
  • Preheat grill or grill pan over high heat for 5-10 minutes. Brush steak on both sides with oil. Sprinkle generously with salt and pepper. Grill steak until well seared on bottom. Don't attempt to flip it until it releases easily when you gently lift a corner with tongs. When the bottom is nicely seared with beautiful grill marks, flip and finish cooking on the other side until internal temperature reaches 125ºF for medium rare. Transfer steak to a cutting board, tent with foil and let it rest for 5 minutes to redistribute the juices before slicing. Serve steak sliced with green sauce drizzled over.
Keyword Peruvian Green Sauce

Last Updated on May 23, 2023 by Jennifer Pallian BSc, RD

5 1 vote
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Anna Foley
Anna Foley
1 year ago

5 stars
The sauce was excellent! Had it last night over thin cut strip loin. Flat Iron steak wasn’t available anywhere I looked (grocery and two butchers). Thank you this recipe!!!

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