Place a large cast iron skillet over high medium-high and add the ghee. You want the skillet to be really hot so make sure the fat is shimmering.
Add the chicken thighs, skin side DOWN, and try to leave some room between them so they don’t touch. Cover with a splatter screen, and sear skin side down for 5-8 minutes, depending on the strength of your burners. Be patient. Don’t keep poking at the chicken. It’ll release easily from the pan once it’s ready to flip, but you want to make sure the skin is rendered and crispy. Remove the splatter screen. Flip the chicken so the meat side is down.