Grilled Flat Iron Steak with Pistachio Pesto Butter

  • Level: Easy
  • Total: 48 min
  • Prep: 10 min
  • Inactive: 30 min
  • Cook: 8 min
  • Yield: 4 servings
Save Recipe


Pesto Butter:

2 sticks butter, room temperature

1 cup packed basil leaves

4 to 5 cloves garlic

1 teaspoon kosher salt

Pinch coarse ground black pepper

Dash fresh lemon juice

3 tablespoons extra-virgin olive oil

1/4 cup Asiago cheese

2 tablespoons pistachios

Pinch red pepper flakes


Olive oil

4 (8-ounce) flat iron steaks

Salt and freshly ground black pepper


  1. For the butter:
  2. In a food processor add, butter basil, garlic, salt and pepper. Pulse a few times until well combined. Add lemon juice and drizzle oil. Pulse again. Add cheese, pistachios and red pepper flakes. Remove from processor with a rubber spatula onto a sheet of parchment paper and shape into a log. Place in the refrigerator and allow to set for at least 30 minutes.
  3. For the steak:
  4. Preheat grill to medium.
  5. Drizzle the steaks with olive oil. Put on the grill, and while cooking season with sea salt and black pepper, to taste. Cook for 3 to 4 minutes, then flip and season with salt and pepper, to taste. Grill for another 3 to 4 minutes. Remove from the grill to a platter and allow to rest for a few minutes. Slice disks of butter, put on steaks while still hot and serve.
Get the Recipe

Perfect Cranberry Sauce

This ruby-hued sauce is a breeze to make with either fresh or frozen fruit.

Peppercorn Rubbed and Grilled Flat Iron Steak

Whiskey Glazed Flat Iron Steaks and Grilled Potatoes

Flat Iron Steak with Tango Sauce

Flat Iron Steak with Cabernet Sauce

Szechwan-Marinated Flat Iron Steak

Grilled Flat Iron Steak with Blue Cheese Butter and Grilled Grapes

"Dressed" American Wagyu Flat Iron Steak

Flat Iron Steak with Piquillo Pepper Pesto