01 - Place the chicken breasts in a large resealable bag or a shallow dish.
02 - In a bowl, whisk together cilantro, lime juice, olive oil, garlic, cumin, chili powder, smoked paprika, salt, pepper, and lime zest until well combined.
03 - Pour the marinade over the chicken. Seal the bag or cover the dish. Refrigerate for at least 30 minutes, up to 4 hours for deeper flavor.
04 - Preheat grill or skillet to medium-high heat.
05 - Remove chicken from marinade, letting excess drip off. Grill or pan-sear for 6–8 minutes per side, or until internal temperature reaches 165°F.
06 - Let chicken rest for 5 minutes before slicing. Serve with extra lime wedges, fresh cilantro, and choice of sides.