01 - Whisk together olive oil, soy sauce, honey, lemon juice, garlic, smoked paprika, cumin, oregano, red pepper flakes if using, salt, and black pepper in a large bowl until thoroughly combined.
02 - Add chicken thighs to the marinade, turning pieces to coat completely. Cover bowl and refrigerate for minimum 2 hours, preferably overnight for optimal flavor penetration.
03 - Preheat grill, oven, or skillet to medium-high heat (approximately 375°F to 400°F).
04 - Lift chicken from marinade, allowing excess liquid to drip off. Discard remaining used marinade.
05 - Grill or roast chicken thighs for 6 to 7 minutes per side until internal temperature reaches 165°F and skin becomes crisp and caramelized.
06 - Transfer chicken to a platter and let rest for 5 minutes to allow juices to redistribute throughout the meat.