Coda alla vaccinara—oxtail braised in the vaccinaro (slaughterman) style—is Rome's great offal braise, a rich, wine-dark, tomato-based stew of oxtail with celery, raisins, pine nuts, and bitter cocoa that represents the apex of the cucina del quinto quarto (fifth quarter cooking) tradition born in Rome's Testaccio slaughterhouse district. The 'fifth quarter' refers to the offal and extremities—the parts of the animal left over after the four noble quarters were claimed by the wealthy—which Roman butchers and their families transformed into some of the city's most beloved dishes. The preparation is patient: oxtail is cut into segments through the joints, browned deeply in lard or olive oil, then braised slowly with tomato, white wine, onion, carrot, and celery for 3-4 hours until the meat is falling-off-the-bone tender and the marrow has dissolved into the sauce, creating a rich, gelatinous base. The finishing touch is definitively Roman: a separate mixture of celery (cooked separately until tender), pine nuts, raisins soaked in warm water, and a grating of bitter cocoa powder is added to the stew in the final 30 minutes. This unexpected combination—particularly the cocoa—adds a mysterious, dark depth that lifts the dish from simple braise to something baroque and complex. The sauce should be thick, dark, and glossy from the dissolved collagen, and the meat should slide from the bones. Coda alla vaccinara is traditionally served as a secondo after a primo of pasta dressed with the stew's sauce—the Roman practice of dividing a single braise into two courses.
Brown oxtail deeply. Braise in tomato and wine for 3-4 hours until falling off bone. Add celery, pine nuts, raisins, and cocoa in final 30 minutes. Sauce should be thick and gelatinous. Serve the sauce on pasta as primo, the meat as secondo.
The cocoa should be unsweetened and added sparingly—a tablespoon per kilo of oxtail. The raisins should be soaked in warm water for 15 minutes. Cook the celery for the garnish separately so it retains some texture. The dish is dramatically better the next day. Use the sauce (strained) to dress rigatoni as a primo course.
Rushing the braise (minimum 3 hours). Omitting the pine nuts, raisins, or cocoa (defining elements). Using lean meat instead of oxtail (needs the collagen). Not browning deeply enough. Making the sauce too thin.
Ada Boni, La Cucina Romana; Rachel Roddy, Five Quarters