Preheat your oven to 325°F and position the rack in the middle. Pat your beef short ribs completely dry with paper towels—this matters because moisture blocks browning. I learned this the hard way after my first batch steamed instead of seared.
Combine kosher salt, black pepper, garlic powder, onion powder, smoked paprika, and ground cumin in a small bowl. Rub this mixture all over every surface of the ribs, really getting into the crevices because the seasoning is doing the heavy lifting here. This 2-minute step is why fall off bone oven beef ribs taste like they've been marinating for hours.
Heat olive oil in a large oven-safe skillet over medium-high heat until it shimmers (about 2 minutes). Working in batches if needed, sear the ribs for 3-4 minutes per side until they develop a deep brown crust. Don't rush this—the Maillard reaction is creating flavor that braising alone can't touch.
Pour off most of the fat, leaving just a thin coating in the pan. Add apple cider vinegar and water to deglaze, scraping up all those browned bits because they contain concentrated beef flavor. Stir in the brown sugar, mixing until it dissolves into the liquid.
Cover the skillet with foil and transfer to the oven for 25 minutes at 325°F. I check at the 20-minute mark just to watch the ribs soften—it's oddly satisfying seeing the transformation happen. The covered environment creates steam that tenderizes while the oven heat does the work.
Remove the foil carefully (steam burns are real), and the meat should pull from the bone with almost no resistance. If a small fork pierces the thickest part easily, you've nailed it. Garnish with fresh parsley and let rest for 3 minutes before serving because the meat needs that pause to reabsorb juices.