Foie gras — literally fatty liver — comes from ducks or geese that have been gavage-fed to produce an engorged liver of exceptional fat content and mild, sweet, almost buttery flavour. Its production is concentrated in the Gascony and Périgord regions of France and in Alsace. Escoffier's preparations for foie gras fill an entire chapter; Pépin focuses on the practical techniques available in a professional kitchen without a dedicated cold room.
The preparation and cooking of duck or goose foie gras — either as a quickly seared escalope (sautéed foie gras, the most immediate preparation) or as a terrine of raw lobes set cold in their own rendered fat (terrine de foie gras, the most refined). Both preparations begin with the same material: a grade A fresh lobe of foie gras, veined, seasoned, and handled with the minimum possible contact from warm hands. Foie gras is not a forgiving ingredient. Its fat content — 40–50% by weight — means it responds to heat with extraordinary speed and to careless handling with immediate collapse.
Foie gras achieves its extraordinary flavour because the engorged hepatocytes contain an extraordinary concentration of lipids — the liver cells are almost entirely fat, with the fat carrying the aromatic compounds that make the organ so distinctive. As Segnit notes, foie gras and Sauternes is the most classical French luxury pairing for a chemical reason: the botrytis-affected wine carries apricot and honey-derived aromatic compounds — lactones and terpenes — that are fat-soluble and bond with the foie gras's fat at the moment of eating, creating a combined aroma that neither ingredient carries alone. The sweetness of the wine resolves the rich fatty liver note on the palate, preventing the fat from becoming oppressive. Brioche with foie gras (Entry 42) works through textural contrast: the brioche's eggy, butter-rich crumb provides a fat platform of its own that amplifies the foie gras's flavour while its structured crumb provides the physical resistance needed against the near-liquid richness of the liver.
**Ingredient precision:** - Foie gras: Grade A duck (canard) or goose (oie) foie gras, fresh or frozen. Goose foie gras is more delicate in flavour and more expensive; duck foie gras has a more assertive, slightly more mineral character and is the standard of modern restaurant kitchens. Weight: 450–600g for a single lobe. - Deveining: [VERIFY] Pépin's specific deveining method — the traditional French approach involves splitting the lobe along its natural seam and removing the central vein system with a small knife and fingers, working at refrigerator temperature. - Seasoning: salt, white pepper, and a small amount of sugar (for the sautéed version) — or salt, white pepper, and either Sauternes, Armagnac, or port (for the terrine). **Sautéed foie gras escalope:** 1. Slice the cold, deveined lobe into escalopes of 1.5–2cm thickness. Work quickly — warm hands melt the surface fat. 2. Score each escalope lightly on one side — this slows the fat rendering slightly and keeps the escalope flat during cooking. 3. Season immediately before cooking — not in advance. Salt draws moisture from the surface and the escalope will steam rather than sear. 4. Sear in a very hot, dry pan (no added fat — the foie gras will render immediately) for 45–60 seconds per side. The surface should be deeply golden-brown; the interior should remain pink. 5. Transfer immediately to a warm plate lined with a cloth. The escalope will continue to render fat for 30 seconds after leaving the pan. **Terrine de foie gras:** 1. Devein the lobe, season generously with salt, white pepper, sugar, and Sauternes or Armagnac. Marinate overnight in the refrigerator. 2. Press the seasoned lobe into a terrine mould, filling it completely and pressing out all air pockets. 3. Cook in a bain-marie at 80°C for 20–25 minutes — until the internal temperature reaches 45–50°C. 4. Cool, pressing with a weighted board as for the galantine (Entry 57). 5. Refrigerate for 48 hours minimum before slicing. Decisive moment: For the sautéed escalope: the 45-second mark. After this point, the fat renders so rapidly that the escalope collapses — it loses its structural integrity and becomes a pool of fat with a golden crust. The window between correct and collapsed is 15 seconds at the temperatures required for correct searing. Season at the last moment. The pan must be scorching. The escalope goes in, is not touched for 45 seconds, is turned, cooked for 30 more seconds, and removed. Everything else is distraction. Sensory tests: **Sound — the sear:** Foie gras escalope in a very hot dry pan: an immediate, violent sizzle from the fat rendering on contact with the heat. This sound is more intense than any other protein — the fat content is so high that it produces a dramatic, almost alarming initial sizzle that quickly settles as the surface seals. If the sound is not immediate and violent, the pan was not hot enough and the escalope will absorb its own fat rather than searing. **Sight — the colour:** The cut face of a correctly cooked foie gras escalope should be golden-brown — the colour of a perfect French toast — with the cross-section showing a warm pink interior that transitions to a deeper gold at the edges. The escalope should have slightly contracted from its raw size but not dramatically so. If it has contracted to half its original size, it was overcooked and the fat has been expelled. **Feel — the escalope in the pan:** A raw foie gras escalope placed in the pan immediately begins to soften at the edges from the heat. Press gently with a spatula at 30 seconds: it should feel firm at the surface but give slightly in the centre. This slight give with a firm exterior is the only correct moment to flip. **Smell:** A searing foie gras escalope produces one of the most extraordinary smells in cooking — deeply rich, butter-forward, slightly sweet from the fat caramelising, with a subtle liver note beneath. If the smell is primarily of burning fat, the pan was too hot and the surface has gone past the Maillard stage to pyrolysis.
- Render the fat that collects in the pan and around the cooked terrine — duck foie gras fat is among the most flavourful cooking fats available; use it for sautéing potatoes, basting birds, or finishing vegetables - Sauternes syrup reduced to a glaze and drizzled over the plated escalope is the most classical and correct accompaniment — the Botrytis-affected wine's honeyed sweetness is the natural counterpart to the foie gras's fatty richness - [VERIFY] Pépin's specific temperature and time for terrine bain-marie cooking
— **Collapsed escalope — pool of fat with a thin crust:** Overcooked. The fat rendered completely and the connective tissue holding the lobe together failed. The pan was at the correct temperature but the escalope was left 30–60 seconds too long. Or: the escalope was sliced too thin — under 1.5cm, there is insufficient mass to survive the required searing time. — **Pale, steamed surface with significant fat loss:** Pan not hot enough. The fat began to render before the surface temperature was sufficient for Maillard browning — the escalope steamed in its own rendered fat. — **Terrine too firm and waxy:** The terrine was cooked at too high a temperature. The fat was expelled from the cells rather than remaining within them. The texture is dense and the mouthfeel is unpleasant.
Jacques Pépin's Complete Techniques