Put the cilantro, garlic, jalapenos, olive oil, lime juice, cumin, salt, and pepper in food processor.
Blend until a thick paste forms.
Place the marinade and chicken thighs in a Ziploc bag and refrigerate overnight.
Preheat the Big Green Egg to 400° and set it up for direct grilling.
Take the chicken out of the marinade and let come to room temp while BGE preheats.
Place the chicken skin side down for 10 minutes to render out the fat and crisp the skin.
Flip the chicken and cook another 15 minutes or until the chicken measures 165° using instant read meat thermometer.
Remove the chicken and let rest for 10 minutes before serving.