Sauce bordelaise takes its name from the Bordeaux wine region and was codified as one of Escoffier's compound brown sauces — a derivative of espagnole/demi-glace with the characteristic wine reduction and marrow garnish. It is the classic sauce for entrecôte bordelaise — grilled or sautéed rib-eye steak — and for any preparation where a red wine reduction of depth is appropriate.
A reduction of red wine (specifically Bordeaux, or any structured, tannic red wine) with shallots, thyme, and bay, mounted with demi-glace and finished with bone marrow — the signature garnish that distinguishes bordelaise from every other red wine sauce. The marrow is not mere enrichment: poached and laid as a crown on the finished dish, it provides a textural counterpoint to the sauce's concentrated depth — richness against richness, but one liquid and hot, the other yielding and barely warm.
Red wine's contribution to a sauce is not primarily flavour but structure. As Segnit notes, wine's tannins — polyphenols that bind to protein and fat — provide a counterpoint to the richness of beef and butter that makes each mouthful more appetising than the last. In sauce bordelaise, the slow reduction polymerises the tannins from sharp and drying to smooth and firm — providing structural backbone rather than astringency. The bone marrow adds free glutamates (particularly inosinic acid — a nucleotide that enhances the perception of glutamate) on top of the demi-glace's existing glutamate base: double umami stacking in a single sauce.
**Ingredient precision:** - Wine: a genuine Bordeaux (Cabernet Sauvignon/Merlot blend) or equivalent structured red — Cabernet Sauvignon from any appellation, Merlot, or Côtes du Rhône. The wine's tannins are the source of the sauce's characteristic slight astringency that cuts through the fat of the beef. Avoid light, fruity wines (Beaujolais, Pinot Noir) — they produce a flatter, less structured sauce. Never use cooking wine. - Shallots: 4 large shallots, very finely minced. Their sweetness moderates the wine's tannins during reduction. - Demi-glace: 250ml of genuine demi-glace (Entry 8) or a well-reduced veal stock of considerable depth. - Bone marrow: from beef femur bones (ask the butcher to cut the bones into 5cm sections). The marrow is extracted by soaking in salted water for 24 hours to remove blood, then gently pushed from the bone with a finger or the handle of a small spoon. 1. Reduce the red wine with the shallots, thyme, bay, and black pepper by three-quarters over medium heat — a patient reduction, not a rapid boil. The slow reduction allows the tannins to soften; a fast boil produces a harsh, astringent reduction. 2. Add the demi-glace. Simmer together for 10 minutes until the sauce coats a spoon. 3. Strain through a fine sieve, pressing the shallots firmly. 4. Return to low heat. Mount with cold butter in small pieces, swirling rather than whisking — whisking incorporates too many air bubbles and the sauce loses its characteristic gloss. 5. Adjust seasoning. The sauce should taste deeply savoury, slightly fruity, with a perceptible tannic depth and a richness from the butter. 6. Poach the marrow discs: slide them gently into barely simmering, lightly salted water for 2 minutes — until translucent and just heated through. Do not boil or they dissolve. 7. Lay the poached marrow on the sauced preparation immediately before service. Decisive moment: The wine reduction — specifically, the point at which the reduction is complete and the demi-glace is added. Reduce too little: the wine's rawness persists in the finished sauce. Reduce too much: the wine's sugars caramelise past the point of balance and the sauce tastes of cooked jam rather than wine. The correct reduction is a syrupy, intensely flavoured liquid of 60–70ml from an initial 500ml of wine — dark, fragrant, with the raw alcohol fully driven off and the flavour concentrated but not burnt. Sensory tests: **Smell — the wine reduction:** At the beginning of reduction: sharp, alcoholic, primary wine fruit. At the midpoint: the alcohol is largely gone and the reduction smells of concentrated berry fruit and a warm tannin note. At the correct endpoint: the smell is wine-deep but without sharpness — a concentrated, complex note that suggests the quality of the wine used. **Sight — the nappe test on the finished sauce:** Sauce bordelaise is a dark, mahogany-coloured sauce with a high gloss from the butter mounting. Dip a spoon — it should coat with a film of consistent depth. Hold horizontally: the sauce clings rather than drips. The colour should be deep red-brown with a slight transparency when held against a light source. **Taste — the tannin balance:** The sauce should have a perceptible but not dominant tannin note — a slight dryness at the back of the palate after swallowing. If the tannin is harsh and drying, the reduction was too rapid or the wine was too tannic and required more shallot sweetness to moderate it. If no tannin note is present, the sauce lacks the characteristic bordelaise structure. **Sight and feel — the poached marrow:** Correctly poached marrow is translucent — no longer opaque white, but not dissolved. It should hold its disc shape when lifted with a spoon but yield immediately to the touch of a fork. Overcooked: the marrow becomes liquid and spreads across the plate. Undercooked: it has a waxy, dense texture that does not melt.
- The shallot reduction can be made in advance and refrigerated for up to 3 days — reduce the wine, strain, and store. Add the demi-glace to order during service - Add a very small quantity of the wine (1 tablespoon, uncooked) to the finished, strained sauce just before butter mounting — a technique called 'finishing with fresh wine' that restores the primary fruit note that reduction drives off - For restaurants without fresh bone marrow: marrow butter (raw marrow and butter blended, rolled in cling film, and frozen) melts into the sauce at the last moment — not traditional but effective
— **Harsh, astringent sauce:** Wine reduced too quickly over high heat. The tannins were not given time to polymerise and soften during a slow reduction. Cannot be corrected — more butter will moderate but not resolve it. — **Jam-like sweetness:** Wine reduced too far — the sugars caramelised. Dilute with additional demi-glace and balance with wine vinegar. — **Dissolved marrow that is invisible at service:** Over-poached. 2 minutes in barely simmering water is the maximum. The marrow should be poached immediately before plating.
Jacques Pépin's Complete Techniques