Côte de Boeuf Rôtie — Roasted Rib of Beef on the Bone

Ingredients

• 1 (800g–1.2kg) côte de boeuf, bone-in rib steak, 5–6 cm thick; 35+ day dry-aged if available
• 10 g fleur de sel, for aggressive pre-salting and table service
• 30 ml neutral oil, high smoke-point; for the pan
• For the oven baste
• 60 g unsalted butter
• 3 garlic cloves, lightly crushed, unpeeled
• 4 thyme sprigs, fresh
• For the pan jus
• 100 ml red wine, for deglazing
• To serve
• 1 tbsp bone marrow butter, or roasted bone marrow, spread on carved slices
• 1 tbsp Dijon mustard, at table

Method

1. 1
   Two hours before cooking, remove the côte de boeuf from refrigeration. Salt all surfaces aggressively with fleur de sel. After 10 minutes, beaded moisture will appear on the surface; leave undisturbed. Over 45–60 minutes the brine is reabsorbed via osmosis, seasoning the meat to a depth of 1 cm. The surface must be visibly dry before the meat enters the pan.
2. 2
   Set the oven to 200°C. Heat a heavy cast-iron pan or plancha over the highest flame until the surface reaches 280–300°C. A drop of water must evaporate on contact instantly. Film the pan with a thin layer of neutral oil.
3. 3
   This is where the dish lives or dies. Lay the côte de boeuf flat-meat-side down and sear without moving for 3–4 minutes, then turn onto the fat cap for 2 minutes, then onto the bone side for 1 minute — 6–7 minutes total. At every stage the colour must progress to a deep mahogany. A pale or grey crust at this point cannot be recovered in the oven; Maillard development stops the moment butter is added.
4. 4
   Transfer the pan to the 200°C oven. After 7–8 minutes, add the butter, crushed garlic, and thyme to the pan. Baste the meat twice during the remaining oven phase, spooning the foaming butter over all surfaces. Roast for 15–20 minutes total until a probe inserted between the meat and the bone — the coldest point and the true indicator of doneness — reads 52–55°C for medium-rare.
5. 5
   Transfer the côte de boeuf to a rack and rest for a minimum of 15 minutes, ideally 20, near a warm oven with the door ajar. Carryover heat equalises the internal temperature gradient; the juices cease migrating and are retained in the fibres rather than pooling on the board.
6. 6
   While the meat rests, deglaze the pan over medium heat with the red wine, scraping up all browned deposits. Reduce until the jus coats a spoon lightly, then pass through a fine sieve into a warm sauceboat.
7. 7
   At the table, carve in thick slices against the grain, off the bone. Lay a small amount of bone marrow butter on each carved slice — the marrow melts into the surface of the meat within seconds. Serve with the pan jus, additional fleur de sel, and Dijon mustard alongside.