- Stir together pineapple juice, soy sauce, honey, cilantro, garlic, ginger, and gochugaru powder in a small bowl until honey is dissolved. Place steaks in a shallow glass dish and pour marinade over. Cover and refrigerate for 1 hour up to overnight.
- Heat an oiled grill or a cast iron grill pan over medium-high heat. While grill heats, remove steaks from marinade and place between a few sheets of paper towels to absorb excess liquid from marinade. Once grill is hot, place steaks on and grill for 2-3 minutes on each side for medium doneness. Rest steaks on a serving plate for 5 minutes before serving.