If using wooden skewers, soak in water for at least 30 minutes.
Combine peanut butter, coconut milk, soy sauce and Sriracha in a small saucepan over medium-low heat. Cook, stirring constantly, just until smooth and well-blended.
Thread chicken evenly on skewers. Brush peanut mixture over chicken. Let marinate 10 minutes to 1 hour.
Preheat broiler to high or grill to medium-high. Broil chicken 8–10 minutes, turning once, until golden brown and cooked through.
Sprinkle with cilantro and peanuts. Serve with lime wedges.
