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French

Sauce Charcutière and Sauce Robert

Two closely related compound brown sauces that form a family with sauce lyonnaise — all sharing the foundation of a wine-and-vinegar-based reduction with demi-glace. Sauce Robert: white wine and onion reduction with demi-glace, finished with Dijon mustard added off heat. Sauce charcutière: sauce Robert with the addition of fine-cut cornichons, making it the canonical sauce of the charcutier's table — served with grilled pork, sausage, and pied de cochon. Both require the mustard added off heat (the same principle as sauce gribiche and rognons) — heated mustard loses its volatile isothiocyanates and the sharp note that defines both sauces.

ServesFour portions
Sourced1of 6 in BC
Cook
I

The Market List

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For sauce Robert
1
medium onion
finely chopped
Your own market
150 ml
dry white wine
Not yet stocked in British Columbia
400 ml
demi-glace
Not yet stocked in British Columbia
2 tbsp
Dijon mustard
added off heat only
Your own market
30 g
cold unsalted butter
cut into small cubes for mounting
Your own market
For sauce charcutière (additional)
60 g
cornichons
cut into fine julienne; blanched briefly if milder sharpness is preferred, raw for full contrast
Origin · FranceLekker · Vancouver →

Each tap is counted, so the stockist sees the demand Provenance sends them.

II

The Method

1
Sweat the finely chopped onion in a little butter over moderate heat until softened and translucent. Add the white wine and reduce almost completely — nearly dry — so that the wine's acidity is concentrated into the onion base.
2
Add the demi-glace. Bring to a gentle simmer and cook for 10 minutes, stirring occasionally, until the sauce has a smooth, cohesive body and the onion has surrendered entirely into the liquid.
From the canon — Demi-glace is the backbone of classical French brown sauce cookery — equal parts espagnole and fond brun reduced together by half, producing a sauce base of … Demi-Glace — Half-Glaze Sauce Base →
3
Pass the sauce through a fine strainer, pressing the solids to extract all liquid. The result should be a glossy, deep brown sauce of coating consistency.
4
Remove the pan from the heat and allow it to cease boiling. Stir in the Dijon mustard — 1 tablespoon per 200 ml of sauce — and mount with the cold butter cubes, swirling until fully incorporated. This is where the dish lives or dies: mustard added above 70 °C loses its allyl isothiocyanate compounds irreversibly, and no quantity of mustard added afterward can restore the sharp, clean note that defines both sauces.
5
For sauce charcutière only: fold the fine julienne of cornichons into the finished sauce Robert. Do not return the sauce to a boil and do not strain again. The cornichons should retain their texture and either their raw sharpness or, if briefly blanched, a moderated acidity.
III

Quality Hierarchy

01
Reserve — House-made demi-glace reduced from a proper brown veal stock; cornichons from a small-production maison (Maille or equivalent); Dijon mustard of known provenance with assertive heat.
02
Estate — A reliable commercial demi-glace reduced by one-third to concentrate it; a respectable supermarket Dijon mustard; quality French cornichons in brine.
03
Market — Good-quality bottled demi-glace used as purchased; standard Dijon mustard; widely available cornichons.
04
House — Demi-glace from a prepared stock base; any Dijon mustard; standard brined cornichons — the technique still applies and the result is serviceable.
IV

Sensory Tests

◇Sight. The wine-and-onion reduction is nearly dry — only a few tablespoons of syrupy liquid remain around the onion.
◇Sight. After 10 minutes' simmering with demi-glace, the sauce coats the back of a spoon in a smooth, glossy film.
◇Smell. Off heat, when mustard is stirred in, a sharp, pungent aromatic lifts immediately from the pan — its presence confirms the mustard's volatile compounds remain intact.
◇Touch. Mounted butter is fully emulsified when the sauce feels silky and slightly resistant on the spoon with no oily separation visible.
◇Where it lives or dies. The mustard must be added off heat, below 70 °C, every time without exception: heat drives off the volatile isothiocyanates that define the sauce's character, and no further addition of mustard can recover them.
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VI

What to Pour

The pairing
El Silencio Espadin Mezcal
El Silencio Mezcal · Oaxaca — Mezcal
Not yet stocked in British Columbia
Agave spirit
From British Columbia

Nothing from British Columbia holds against this yet.

Without alcohol

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The whole pairing
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Sourced through Provenance

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Lekker
Vancouver · cornichons
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