Fill a large pot with water and then place the sous vide machine in it. Set the temperature to 145°F for medium, 150°F for medium well, and 160°F for well done.
Pat your bone-in pork chops dry with paper towels and then season them with salt, pepper, and garlic powder. Using a pair of tongs, place the seasoned pork chops into the sous vide bag or Ziplock bag.
If you're using a vacuum sealer, seal the bone-in chops in a vacuum-seal bag. If you're using a resealable plastic bag, make sure to remove as much air as possible using the water displacement method.
Submerge the sealed pork chops into the hot water bath, making sure they are fully immersed.
Cook them for 2 hours for a perfect medium doneness or adjust the time based on your preferred doneness. After they are done cooking, pat the pork chops dry using paper towels.
Heat oil in a cast-iron skillet over medium-high heat and give the cooked chops a quick sear on both sides. I like searing them for 1-2 min per side for a nice golden brown crust. Feel free to use a kitchen torch or grill gun instead of a hot cast-iron skillet to sear the chops.
Rest the juicy pork chops for 5 minutes before slicing and serving them with mashed potatoes, sweet potatoes, roasted vegetables, apple sauce or your favorite side dish.