1. Marinate the Steaks: Place the 1 ½ pounds of steaks in a zip-top bag. Pour the marinade over the steaks, seal the bag, and gently massage the steaks to ensure they are fully coated. Refrigerate the marinaded steaks for at least 2 hours, or overnight for the most intense flavor and tenderness.
2. Cook the Steaks: Place a cast-iron skillet over high heat. Remove the steaks from the marinade and place them in the hot skillet. Sear for 5 to 8 minutes on the first side (see the doneness chart below for more precise timing), then flip and cook for 3 to 4 minutes on the other side.
3. Rest and Serve: Let the steak rest for 5 minutes after cooking. This allows the juices to redistribute throughout the meat. Top the steaks with the 1 ½ tablespoons of butter and garnish with the freshly chopped parsley. Serve immediately with your favorite side dishes.

Cooking Time for Steak Doneness