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grilled flank steak sits in a black grill pan
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4.80 from 20 votes

Grilled Flank Steak with Cilantro Lime Butter

Look no further than this grilled flank steak recipe with cilantro lime butter for an easy and delicious meal. Everyone will love it!
Step-by-step photos can be seen below the recipe card.
Prep Time15 minutes
Cook Time20 minutes
Total Time35 minutes
Course: Main Course
Cuisine: American
Servings: 6 people
Author: Becky Hardin

Equipment

Ingredients

For the Cilantro Lime Butter

  • ½ cup salted butter room temperature (1 stick)
  • 1 tablespoon chopped fresh cilantro
  • 1 tablespoon fresh lime juice (from ½ lime)
  • 2 teaspoons lime zest (from 1 lime)
  • 1 teaspoon finely chopped green onion
  • 1 tablespoon garlic paste we used Gourmet Garden brand

For the Grilled Flank Steak

  • 1 teaspoon kosher salt
  • ½ teaspoon ground black pepper
  • 1 teaspoon mustard powder
  • 1 tablespoon garlic paste
  • 1 tablespoon olive oil
  • 2 pounds flank steak

Instructions

To Make Cilantro Lime Butter

  • Take the softened butter and place it in a medium bowl.
    ½ cup salted butter
  • Stir in the cilantro, lime juice, lime zest, green onion, and garlic paste. Mash with a fork or spoon to fully combine.
    1 tablespoon chopped fresh cilantro, 1 tablespoon fresh lime juice, 2 teaspoons lime zest, 1 teaspoon finely chopped green onion, 1 tablespoon garlic paste
  • Place the butter over plastic wrap and form into a log. Wrap and place in the refrigerator for at least 1 hour, or until firm.
    cilantro lime butter wrapped in plastic wrap

For the Grilled Flank Steak

  • Brush a grill or grill pan with canola oil and heat to high heat. (You want the grill HOT).
  • In a small bowl, combine salt and pepper, garlic paste, olive oil and mustard powder. Stir to combine and form a paste. Rub both sides of steak with the paste.
    1 teaspoon kosher salt, ½ teaspoon ground black pepper, 1 tablespoon garlic paste, 1 tablespoon olive oil, 1 teaspoon mustard powder
    raw flank steak on a cutting board
  • Place flank steak on grill and cook for approximately 3-4 minutes per side for rare, or 6-8 minutes per side for well done. We do something in between. Please see my Meat Temperature Chart for help deciding.
    2 pounds flank steak
    grilling flank steak
  • Remove from heat.
  • Cut into slices, against the grain.
    sliced flank steak on a grill pan topped with cilantro lime butter
  • Before separating, slice butter and allow to melt over the steak.

Video

Notes

  • Start with a steak marinade to make it even more tender.
  • Be sure to cut flank steak against the grain, and slice it thinly. This is the most enjoyable way to eat it!
  • The steak butter can easily be made ahead of time, stored in the fridge, and used for other things if you have leftovers.
  • Steak Internal Temperature Guide:
    • For rare steak: 125-130°F
    • For medium-rare steak: 130-140°F
    • For medium steak: 140-150°F
    • For medium-well steak: 150-160°F
    • For well-done steak: 160-165°F
Storage: Store grilled flank steak with cilantro butter in an airtight container in the refrigerator for up to 3 days or in the freezer for up to 3 months.

Nutrition

Serving: 0.33pound | Calories: 374kcal | Carbohydrates: 2g | Protein: 33g | Fat: 25g | Saturated Fat: 13g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 131mg | Sodium: 590mg | Potassium: 550mg | Fiber: 0.2g | Sugar: 0.1g | Vitamin A: 484IU | Vitamin C: 3mg | Calcium: 48mg | Iron: 2mg