01 - In a large mixing bowl, whisk together lime juice, olive oil, chopped cilantro, minced garlic, ground cumin, chili powder, smoked paprika, kosher salt, and black pepper until thoroughly combined.
02 - Add chicken thighs to the marinade, turning pieces to ensure complete coating. Cover bowl and refrigerate for minimum 30 minutes, up to 4 hours for optimal flavor penetration.
03 - Preheat grill to medium-high heat, approximately 400°F.
04 - Remove chicken from marinade, allowing excess liquid to drip off. Discard used marinade.
05 - Place chicken thighs on preheated grill. Cook for 6-8 minutes per side, turning once, until nicely charred and internal temperature reaches 165°F when tested with meat thermometer.
06 - Transfer grilled chicken to serving platter, cover loosely with foil, and let rest for 5 minutes to allow juices to redistribute throughout meat.
07 - Garnish with additional chopped fresh cilantro and lime wedges if desired. Serve immediately while hot.