Prep the chicken. Cut two slits at the bottom of the chicken thighs, alongside the bone (optional step). Rub the minced garlic on the chicken meat, then add salt, brown sugar and cayenne pepper.
Heat up a skillet and pan-fry the chicken, skin side down first, until the skin surface becomes slightly brown, but the bottom part of the chicken is nicely browned and becomes crispy.
Transfer the chicken to a cast-iron skillet, add the garlic head and butter cubes. Roast the chicken for 20 minutes, and broil for 1 minute until the skin becomes slightly charred. Remove from oven, garnish with the parsley and serve immediately.
Notes
The optional step of cutting two slits on the chicken thighs is to make sure that the garlic is flavorful with the nice aroma and taste of garlic.