StocksLes Fonds

Why stock is the foundation

A stock cube dissolves into salt, fat, flavour-enhancers and a whisper of the animal or vegetable it claims to represent. Real stock is the animal or vegetable itself, patiently persuaded into water. The two are not the same food wearing different names — they behave differently in a pan, they reduce differently, and they taste, quite simply, of different things.

Stock — fond, literally "foundation" — is the base of the great majority of classical French sauces, the braising liquid for meat and vegetables, the backbone of a soup, and the liquid a risotto or a blanquette is built on. Escoffier organised an entire cuisine around a small number of "mother" preparations, and stock sits underneath even the mother sauces: a velouté is a stock thickened with a roux; a demi-glace is a brown stock reduced and refined for days. Master this page and every later technique page on this site — Sauce Making, Braising & Stewing, Poaching & Steaming — becomes an extension of it rather than a separate subject.

A cube fails on three counts. It is salted for the finished dish, which removes your ability to reduce it — reduce a cube-based liquid and you concentrate salt, not flavour. It carries no gelatine, so it never gives a sauce body or a cold terrine its set. And it tastes of itself first and your ingredients second. None of this is snobbery; it is simply what a cube is for, which is speed, not depth.

The family of stocks

Five liquids cover almost everything a home kitchen needs, and they differ mainly in what goes in raw and what is roasted first.

• Fond blanc — white stock. Chicken or veal bones, never roasted, simmered gently with aromatics. Pale, clean, versatile — the base for velouté, blanquette, and most poultry and vegetable soups.
• Fond brun — brown stock. Veal or beef bones roasted hard until deeply coloured, then simmered with roasted aromatics and often a spoonful of tomato paste. Dark, deep, the base of demi-glace and of almost every classical brown sauce.
• Fumet de poisson — fish stock. White fish bones and heads only, never oily fish, sweated briefly in butter rather than roasted, then simmered — briefly, unlike the others. The base for fish veloutés and beurre blanc-family sauces.
• Court-bouillon. Not a stock at all in the strict sense — no bones — but an aromatic poaching liquid of water, vinegar or wine, vegetables and herbs, made fresh each time and generally discarded after use. For poaching whole fish, shellfish and some vegetables.
• Bouillon de légumes — vegetable stock. No bones, no gelatine, built entirely from vegetables and needing a different hand than the others — see below.

Ratios: bones, water, aromatics

Every stock in this family follows the same underlying ratio: roughly equal parts bones and water by weight, with the classical mirepoix — onion, carrot, celery, in a rough 2:1:1 ratio — at around a tenth of the bone weight. Scale up or down to whatever pot you have; the method does not change.

The roasting step for a brown stock

A brown stock's colour and depth come entirely from the Maillard reaction — the browning of proteins and sugars under dry heat — applied to bones and vegetables before they ever meet water. Skip this step and a "brown" stock is merely a pale one with tomato paste stirred in.

Never boil, always simmer

This is the single rule that separates a clear, clean stock from a cloudy, muddy one, and it holds for every stock in the family. A rolling boil is violent enough to physically smash fat globules into microscopic droplets and beat them into the water — an emulsion, exactly the mechanism explained on the Emulsions page, except here it is an accident rather than a goal. Once fat is emulsified through a stock, no amount of straining removes it, and the stock stays permanently cloudy and tastes faintly greasy rather than clean.

A bare simmer — the water barely trembling, a bubble breaking the surface every second or two, never a churn — cooks the bones just as thoroughly over a longer time, extracting collagen into gelatine and flavour into the water, without ever agitating the fat into suspension.

Skimming, and why the first twenty minutes matter most

As a stock comes up to temperature, proteins from the bones and any clinging blood coagulate and rise as grey foam — this is the scum, and it carries the impurities that would otherwise cloud and dull the finished stock. It rises fastest and thickest in the first fifteen to twenty minutes, tapering off sharply after that.

• Bring to the boil, then straight down. Bring the pot up to a boil once, uncovered, purely to drive the scum to the surface quickly — then immediately drop the heat to a bare simmer for the rest of the cooking time.
• Skim with a ladle or large spoon, not a whisk. Draw the scum off the surface towards the edge of the pot and lift it away; do not stir it back through the liquid.
• Skim every few minutes for the first twenty. This is where the bulk of the impurity comes off. After that, a check every fifteen to twenty minutes for the rest of the simmer is enough.
• Top up with cold water if the level drops sharply. A small splash of cold water also helps drive any remaining fat and scum back to the surface, an old trick that still works.

Timings by stock type

Longer is not automatically better. Past a certain point a stock stops gaining flavour and starts gaining a dull, over-extracted, slightly bitter note from bone marrow and connective tissue breaking down too far — fish stock in particular turns bitter and gluey if pushed past its window.

Straining without a chinois

A conical fine-mesh chinois is a professional convenience, not a requirement. A large sieve — ideally metal, resting over a big bowl or clean pot — lined with a double thickness of damp muslin or a clean, damp tea towel does the same job at home, and does it thoroughly.

Reducing to a glace, degreasing, storing

A finished stock reduced hard, uncovered, at a steady simmer, becomes glace de viande or glace de volaille — meat or chicken glaze — a syrupy, intensely flavoured reduction that sets almost solid when chilled, thanks to the gelatine concentrating along with everything else. A spoonful stirred into a thin sauce at the last minute does more for it than almost any other single ingredient in a French kitchen.

• Reduce in stages. Take an unsalted, well-strained stock down by half, let it cool slightly, strain again if any fat or sediment has surfaced, then continue reducing. This catches impurities that a single long reduction would concentrate straight into the glace.
• Watch the last stretch closely. A glace can go from properly reduced to scorched in a few careless minutes once the volume is small — reduce the heat as the pot gets emptier and stir more often.
• Degrease hot, then degrease cold. While the stock is still hot, skim visible fat from the surface with a ladle held flat — most of it comes off this way. Then chill the stock fully; the remaining fat solidifies into a firm cap that lifts off cleanly in one piece, taking with it fat you could never fully skim from a hot liquid.
• Freeze in usable portions. Ice cube trays for spoon-sized amounts to enrich a sauce, small tubs or freezer bags laid flat for larger batches. Stock keeps three to four days refrigerated and up to six months frozen; glace, being concentrated and low in water, keeps even longer.

The bouquet garni and sachet

The classical bouquet garni is a small bundle of aromatics — traditionally a few parsley stalks, a sprig of thyme and a bay leaf — tied together with kitchen string, sometimes wrapped in the green part of a leek, and dropped into the pot whole so it can be lifted out entire at the end, leaving no loose herb stalks to strain out later. A sachet d'épices does the same job for anything you would rather not tie: peppercorns, a clove, a bay leaf and herb stalks knotted into a small square of muslin.

Neither needs to be elaborate. What matters is that it is retrievable — never scatter loose bay leaves and peppercorns straight into a stock you intend to reduce, or you will be picking them out of a syrupy glace with a teaspoon later. Parsley and herb stalks trimmed while preparing vegetables are exactly what belongs in the bundle — nothing here is bought specially.

Consommé and the egg-white raft

A consommé is a stock clarified until it is close to transparent, using egg whites to trap and lift every particle of sediment and fat that straining alone leaves behind. It is one of the great set-pieces of classical French cooking, and also, honestly, one of the more theatrical uses of a Sunday afternoon — worth understanding, not worth doing every week.

Vegetable stock, and why it needs different treatment

Without bones, a vegetable stock has no collagen and therefore no gelatine, no body, and none of the slow, several-hour extraction that a meat stock rewards. Treat it like a meat stock — hours of hard simmering — and it turns muddy, bitter and flat rather than deep.

• Cut the vegetables small. More surface area for a shorter cooking time — rough dice rather than the large chunks a long-simmered meat stock can use.
• Sweat before you simmer, sometimes. A few minutes in a little butter or oil before the water goes in builds real depth quickly — an optional step meat stocks achieve instead through roasting.
• Avoid the cabbage family and very starchy vegetables. Cabbage, broccoli and cauliflower turn sulphurous over any real simmer; potato clouds the liquid with starch. Onion, leek, carrot, celery, mushroom trimmings, fennel and tomato are the reliable base.
• Keep it short — 45 minutes, covered. Covering the pot matters more here than for a meat stock, since there is no long reduction ahead to concentrate a thin result; a lid keeps the aromatics from evaporating away too early.

Food safety — cooling stock fast without equipment

A large pot of hot stock left to cool slowly on the counter can sit in the temperature range where bacteria multiply fastest — roughly 5–60°C — for hours, which is a genuine food-safety risk for a liquid you may keep several days. None of the fixes below need equipment beyond what is already in the kitchen.

When it goes wrong