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Florentine steak surrounded by parsley and lemon.
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3.84 from 12 votes

Grilled Porterhouse Steak

Grilled Porterhouse Steak with an optional gremolata-style marinade made with lemon, parsley, and garlic.
Prep Time8 minutes
Cook Time11 minutes
Marinade Time1 hour
Total Time1 hour 19 minutes
Course: Dinner, Main Course
Cuisine: Italian
Keyword: Grilled Porterhouse Steak
Servings: 4
Calories: 537kcal
Author: Philip and Kelly Anthony

Ingredients

FOR THE MARINADE (OPTIONAL):

  • ¾ cup freshly squeezed lemon juice about 6-8 lemons
  • 2 cups roughly chopped Italian parsley leaves and stems (about 1 bunch)
  • ½ white onion roughly chopped
  • 5 large cloves of garlic roughly chopped
  • 1 tablespoon Kosher salt
  • 1 tablespoon black pepper
  • ½ cup canola or avocado oil

FOR THE STEAKS:

  • 2 (1 ½" thick) Porterhouse steaks
  • 2 tablespoons canola or avocado oil
  • 2 teaspoons Kosher salt
  • 1 teaspoon black pepper

Instructions

  • Add the lemon juice, parsley, white onion, garlic, salt, and pepper as well as a ¼ cup of water to a mixing bowl and stir to combine. Slowly drizzle in a ½ cup of oil, whisking with the tines of a fork to combine.
  • Place the steaks in a gallon-sized ziptop bag, pour over the marinade, and seal tightly. Refrigerate for at least 1-4 hours, but no more than 8 hours.
  • Set the steaks out at room temperature for 30 minutes prior to grilling. Remove from the bag and pat dry with a paper towel. Drizzle with 2 tablespoons of oil and sprinkle 2 teaspoons Kosher salt and 1 teaspoon pepper amongst the steaks. Rub all over to adhere, and set aside until ready to use. 
  • Prepare a gas or charcoal grill and bring to medium-high heat. To test whether or not your grill is hot enough, (carefully) hold your hand about 6" from the grate. It should be so hot, that you have to move it by the count of 3.
  • Add the beef to the grill. For medium-rare steaks, cook for about 6 minutes on the first side, then flip, and cook for about 5 minutes more.

Notes

  • For rare steaks, cook for about 4-5 minutes on each side. Pull when the internal temperature reaches 120°F.
  • For medium to medium-well steaks, cook for about 6-7 minutes on each side. Pull when the internal temperature reaches 140° – 145°F.

Nutrition

Calories: 537kcal | Carbohydrates: 9g | Protein: 37g | Fat: 40g | Saturated Fat: 11g | Cholesterol: 95mg | Sodium: 1855mg | Potassium: 794mg | Fiber: 2g | Sugar: 2g | Vitamin A: 2527IU | Vitamin C: 60mg | Calcium: 71mg | Iron: 5mg