Confit (from confire — to preserve) is a Gascon technique from southwestern France, the same region that produces foie gras. In the Gascon farmhouse kitchen, every part of the duck was preserved: the confit of the legs, the foie gras of the liver, the magret (the breast), the rillettes of the neck and other trim. The confit was stored submerged in its own fat in ceramic crocks for months — the fat's anaerobic environment preventing bacterial growth. Refrigeration has made the preservation function secondary to the flavour function.
The slow cooking of duck legs — seasoned and cured overnight in salt and aromatics, then submerged in their own rendered fat and cooked at a temperature barely above 82°C until the collagen in the connective tissue has transformed to gelatin and the meat pulls from the bone with the lightest resistance. Confit is one of the great French preservation techniques, but its purpose is not merely preservation: the slow, fat-surrounded cooking produces a texture — yielding but not falling apart, with the muscle fibres distinctly present yet without resistance — that no other method achieves with duck.
Duck confit's flavour is the product of two distinct processes: the overnight cure concentrates the leg's natural flavour through osmotic dehydration and introduces aromatic compounds from the herbs and pepper; the slow fat cooking converts the leg's considerable collagen into gelatin, which bastes the muscle fibres internally throughout the 3-hour cook. As Segnit notes, duck and orange (the classic accompaniment in duck à l'orange) is not mere convention — the duck's oleic fat (the primary fat of both duck fat and olive oil) carries aromatic esters from the orange zest with particular efficiency, and the orange's citric acid cuts through the fat's richness in a way that sweet accompaniments cannot.
**Ingredient precision:** - Duck legs: Moulard, Muscovy, or Barbary duck legs preferred for their higher fat content and more developed flavour. Pekin duck legs are acceptable but produce a less rich confit. The skin should be intact and intact skin should be dry — the overnight cure pulls moisture from the skin surface and facilitates the eventual crisping. - Curing salt: 30g fine sea salt per kg of duck legs. Aromatics: thyme, bay leaf, black pepper, a smashed garlic clove, sometimes juniper berries. The cure duration: 12–24 hours in the refrigerator. [VERIFY] Pépin's specific cure ratio. - Fat: rendered duck fat (from the trimmed excess fat and skin of the duck itself, rendered slowly in a low oven with a little water). Quantity: enough to fully submerge all the legs in the cooking vessel. Minimum 500ml for 4 legs. - Temperature: 82–90°C for the cooking fat — below a simmer in a conventional oven sense. An oven at 120°C reliably maintains this fat temperature in a covered Le Creuset-type vessel. 1. Rub the cure mixture over all surfaces of the legs. Place in a non-reactive container. Cover and refrigerate 12–24 hours. 2. Rinse the cure from the legs. Pat dry thoroughly. 3. Melt the duck fat in the cooking vessel. Add the legs — they must be fully submerged. 4. Cook in a 120°C oven for 2.5–3 hours. The fat should barely shimmer — not bubble, not fry. 5. Test: a skewer inserted into the thickest part of the leg should meet no resistance. The meat should be yielding but the leg should still hold its shape. 6. Cool in the fat. Store submerged in the fat in the refrigerator for up to 6 weeks — the traditional preservation method. 7. To serve: remove from fat, wipe off excess. Place skin-side down in a cold dry pan. Heat over medium-high until the skin crisps to deep mahogany. Turn briefly to heat through. Decisive moment: Testing doneness at the 2.5-hour mark with a skewer or thin knife at the thickest point of the thigh. Correctly confited: no resistance — the skewer slides through as though through butter. The collagen has converted to gelatin and the muscle fibres are fully relaxed. Undercooked: a firm resistance at the bone — return for 30 more minutes. Overcooked confit is almost impossible in a correctly regulated low-temperature oven — the fat temperature is so low that it cannot exceed the collagen conversion temperature. The technique is forgiving if the oven temperature is correct. Sensory tests: **Sight — the fat during cooking:** At 120°C oven: the fat surrounding the duck legs should show the barely-perceptible shimmer of heat convection — small, lazy surface movements with occasional bubbles rising from the base. Not a simmer, not a fry. Any active bubbling means the temperature is too high and the duck is beginning to fry rather than confit — reduce the oven temperature to 110°C. **Smell:** The low, slow cooking of duck in its own fat produces one of the most intensely appealing smells in a professional kitchen — a deep, rich, slightly gamey duck fat note that develops over the 3-hour cook. By the 2-hour mark the kitchen smells of the finished product. **Feel — the doneness test:** A correctly confited duck leg, lifted from the fat, should flex easily when the joint is gently bent — the collagen in the joint has fully relaxed. An undercooked leg has a slight resistance at the joint. **Sound — the crisping stage:** Duck leg placed skin-side down in a cold, dry pan over heat: a gradual, building sizzle as the fat from the skin begins to render and fry in the same pan. This sizzle increases as the skin dries and crisps. The correct sound at full crisping: an aggressive, crackly sizzle like crackling. Turn only when the sizzle reaches this character and the skin is audibly dry.
- The duck fat from the confit, strained of solids, keeps for 3 months in the refrigerator and is one of the most versatile and flavourful cooking fats available — use for roasting potatoes, sautéing vegetables, enriching stews - Duck confit served cold — sliced thin, at room temperature, with a simple green salad and cornichons — is one of the great preparations of the Gascon table - For a restaurant-speed crisping: blow-torch the skin surface after pan-crisping for an additional 30 seconds — the direct flame creates a crackling-level crust that a pan alone rarely achieves in the time available
— **Dry, stringy duck despite correct cook time:** Oven temperature was too high and the duck fried rather than confited. The muscle fibres tightened under fry-temperature heat rather than relaxing under confit-temperature heat. — **Skin refuses to crisp:** The skin was not dried before crisping. Any moisture on the skin surface will steam rather than fry. Pat dry, or return the confited leg to the refrigerator uncovered overnight — the cold air drying the skin completely. — **Flavour is flat, underseasoned:** The cure was rinsed too aggressively, or the cure time was insufficient. 12 hours is the minimum for flavour penetration through a full duck leg.
Jacques Pépin's Complete Techniques