Heat up a cast-iron skillet on high heat. Add the butter and as soon as it melts, add the pork chops. Sear for 1 minutes on the bottom side only. Turn off the heat and add the garlic and rosemary on the side of the skillet. Transfer the skillet to the oven.
Bake the pork chops for 10-12 minutes, or until the internal temperature is 145°F (62°C) using a meat thermometer. You may also cut a slit in the middle to check doneness. Remove from oven and serve immediately.