01 - Combine smoked paprika, garlic powder, onion powder, oregano, thyme, cayenne pepper, black pepper, and salt in a small bowl. Mix thoroughly to ensure even distribution.
02 - Pat chicken thighs completely dry with paper towels to remove excess moisture, ensuring better spice adherence and grill marks.
03 - Place chicken in a large bowl. Drizzle with olive oil and lemon juice, then sprinkle with the prepared Cajun spice blend. Toss vigorously until each piece is uniformly coated.
04 - Cover bowl tightly and refrigerate for at least 30 minutes. For maximum flavor penetration, extend marinating time up to 4 hours.
05 - Heat grill to medium-high temperature, approximately 400°F. Ensure grates are clean and lightly oiled to prevent sticking.
06 - Arrange chicken thighs on preheated grill. Cook for 6-8 minutes per side, turning once, until exterior develops rich char marks and interior reaches 165°F.
07 - Transfer grilled chicken to a clean platter. Let rest for 5 minutes to allow juices to redistribute throughout the meat before serving.