Remove the flat iron steak from the fridge and let it come to room temperature (30-45 minutes).
Season generously with kosher salt, black pepper, and garlic powder (if using).
Marinate (Optional):
Combine olive oil, minced garlic, and lemon juice in a bowl. Marinate the steak for at least 5 minutes or up to 24 hours in the refrigerator.
Grilling Method:
Preheat your grill to 450°F-500°F.
Place the steak on the grill and sear for 3-5 minutes per side. Lower the heat to medium-low and cook until the desired internal temperature is reached.
Medium-rare: 120-125°F (8-10 minutes)
Medium: 130-135°F (10-12 minutes)
Rest the steak for 5-10 minutes before slicing.
Pan-Searing Method:
Heat a cast-iron skillet over high heat with a small amount of oil until hot.
Place the steak in the skillet and sear for 2-3 minutes per side for medium-rare. Add butter to the pan during the last 2 minutes for extra flavor.
Rest the steak for 5-10 minutes before slicing.
Slicing:
Slice the steak against the grain to ensure tenderness
Notes
Variations: Add rosemary, thyme, or other herbs to the butter for a compound butter topping.
Meal Prep: Marinate the steak overnight for deeper flavor.
Substitutions: Use avocado oil instead of olive oil for higher heat cooking.