Sauce Périgueux is the Périgord’s most celebrated sauce — a truffle-enriched demi-glace that represents the supreme expression of the region’s black diamond, Tuber melanosporum (truffe noire du Périgord). The sauce is built on a foundation of demi-glace (reduced espagnole/brown sauce to half volume), enriched with Madeira wine and finished with finely diced truffle and truffle juice. The classical technique: reduce 500ml demi-glace by one-third over medium heat. In a separate pan, reduce 150ml dry Madeira by half (concentrating its oxidative, nutty character). Combine the reduced demi-glace and Madeira, bring to a gentle simmer, then add 50g fresh black truffle cut in brunoise (2-3mm dice) and 2 tablespoons of truffle juice (the liquid from canned truffles, or the juice released during truffle preparation). Simmer for 5 minutes only — prolonged heat diminishes the truffle’s volatile aromatics. Mount with 30g cold butter for gloss and body. The sauce should be dark, glossy, intensely aromatic, and full-bodied, with visible truffle pieces suspended throughout. The distinction between Sauce Périgueux (brunoise/diced truffle) and Sauce Périgordine (truffle slices) is meaningful in classical cuisine: Périgueux coats more evenly, while Périgordine provides dramatic visual impact. The canonical pairings are Tournedos Rossini (filet steak topped with foie gras, napped with sauce Périgueux), roasted poultry (particularly Poulet demi-deuil), and soft-cooked eggs (oeufs en cocotte Périgueux). This is not an everyday sauce but a celebration sauce — reserved for the truffle season (December-March) when fresh Tuber melanosporum is available.
Demi-glace base reduced by one-third. Dry Madeira reduced by half separately. Combined, simmered with brunoise truffle and truffle juice. Cook truffle in sauce maximum 5 minutes. Mount with cold butter. Périgueux = diced truffle, Périgordine = sliced truffle. Seasonal: December-March only with fresh truffle.
For the best flavor, add half the truffle at the beginning of the 5-minute simmer (for depth) and half at the very end (for aroma). The truffle juice from a good tin of Périgord truffles (Maison de la Truffe, Plantin) is almost as valuable as the truffle itself — never discard it. A few drops of aged Armagnac added off-heat at the very end adds a Gascon dimension. If using summer truffle (Tuber aestivum) as a more affordable option, double the quantity and add a drop of truffle essence for aroma compensation.
Using truffle oil instead of real truffle (synthetic compound, entirely different). Overcooking the truffle in the sauce (loses volatile aromatics after 5 minutes). Using sweet Madeira (should be dry or Sercial). Skimping on the truffle quantity (this sauce is a truffle showcase — 50g minimum for 500ml sauce). Making outside truffle season with low-quality preserved truffle (wait for the season).
Escoffier: Le Guide Culinaire; La Bonne Cuisine du Périgord — La Mazille