01 - Preheat oven to 325°F (165°C).
02 - Pat beef short ribs dry with paper towels and season generously with salt and black pepper.
03 - Heat olive oil in a large Dutch oven over medium-high heat. Working in batches, sear short ribs on all sides until browned, about 8 minutes total. Transfer to a plate.
04 - Add onions, carrots, and celery to the pot. Cook, stirring occasionally, until softened and lightly browned, approximately 6 minutes. Stir in garlic and cook for 1 minute.
05 - Add tomato paste and cook, stirring, for 2 minutes.
06 - Pour in apple cider and beef broth, scraping up any browned bits from the bottom of the pot.
07 - Nestle seared short ribs among vegetables in the pot. Add thyme, rosemary, and bay leaves.
08 - Bring mixture to a simmer, cover with lid, and transfer to the preheated oven.
09 - Braise for 2½ to 3 hours, or until beef is fork-tender and nearly falling off the bone.
10 - Remove ribs and vegetables to a serving platter. Skim excess fat from the sauce; discard bay leaves and herb stems. Optionally, reduce sauce over medium heat. Serve short ribs with sauce spooned over the top.