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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

  • Grill or Indoor Grill Pan

Ingredients

For the Cilantro Lime Butter

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

For the Grilled Flank Steak

  • 1 tsp kosher salt
  • ½ tsp ground black pepper
  • 1 tsp mustard powder
  • 1 tbsp garlic paste
  • 1 tbsp olive oil
  • 2 lbs. flank steak at room temperature

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 tbsp chopped fresh cilantro, 1 tbsp fresh lime juice, 2 tsp lime zest, 1 tsp finely chopped green onion, 1 tbsp 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.

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 tsp kosher salt, ½ tsp ground black pepper, 1 tbsp garlic paste, 1 tbsp olive oil, 1 tsp mustard powder
  • 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 lbs. flank steak
  • Remove from heat.
  • Cut into slices, against the grain.
  • Before separating, slice butter and allow to melt over the steak.

Video

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