Preheat Oven: Preheat oven to 400 °F.
Prep Pork Chops: In a large zip-top bag, combine flour, salt, black pepper, thyme, and onion powder. Add pork chops and shake to coat evenly.
Sear Pork: Melt butter in a large (12-inch) oven-safe skillet over medium-high heat. Add pork chops and sear about 3 minutes per side until lightly browned. If they don’t all fit in a single layer without touching, sear them in batches so they brown instead of steaming, adding a little more butter if the skillet looks dry between batches. Transfer seared pork chops to a plate and set aside.
Make Sauce: In the same skillet, whisk together chicken broth, maple syrup, and Dijon mustard. Scrape up any browned bits from bottom of the skillet. Simmer sauce for 3-5 minutes, then add cranberries and rosemary.
Bake: Return pork chops to the skillet, spooning some sauce and cranberries over them. Transfer the skillet to the oven and bake 20-30 minutes (longer for thicker chops), checking with an instant-read thermometer until the pork reaches an internal temperature of 145°F.
Serve: Let rest for a few minutes, then serve, spooning extra sauce and pan juices over the top and seasoning with salt to taste.