Preheat oven to 375 degrees F. Put butter into skillet and heat on stovetop until melted. Pat chicken dry with paper towels.
Sprinkle all sides of meat with seasonings and half of garlic, then put into hot skillet. Brown on both sides, about 4 minutes and then remove from heat. Sprinkle remaining garlic on top of pieces.
Put cast iron skillet into oven for about 15 minutes until the internal temperature is 165 degrees F.
Remove and leave in the pan to rest for 5 minutes before slicing.