1. Heat oven to 300°F. Heat oil in an 8-qt. Dutch oven over medium-high heat. Season ribs with salt and pepper; rub with cocoa powder and chili powder.
2. Working in batches, cook ribs, turning as needed, until browned, 8–10 minutes; transfer to a plate.
3. Add garlic, celery and, onion to pan; cook until soft, 6–8 minutes. Add tomato paste; cook 3 minutes. Add wine; reduce by half, 4–6 minutes. Return ribs to pan and add stock, bay leaves, sugar, Worcestershire, vinegar and cayenne; bring to a boil. Cover and bake until beef is very tender, 2 to 2½ hours. Transfer ribs to a plate; discard bones. Slice ribs in half crosswise.
4. Spoon fat from surface of sauce. Place pan over medium-high heat and add semi-sweet chocolate; simmer until liquid is reduced to about 2 cups, 10 – 15 minutes, then strain into a bowl. Stir in butter and season with salt and pepper to taste.
5. Serve short ribs and sauce over polenta, mashed potatoes, or any other creamy starch that will sop up the deliciousness.

© Recipe and Photo courtesy of Allons Eat. All rights reserved.