Stocks, sauces and soups

In short

Stocks are flavoured liquids extracted by gently simmering bones, trimmings, vegetables and aromatics; sauces are thickened or emulsified liquids that add moisture, flavour, richness and visual appeal to a dish; soups are liquid foods built almost always on a stock base. The three are taught as one block because a sauce or soup can only be as good as the stock beneath it — the classical French "foundation" (fond) on which Carême's and Escoffier's systems rest. This is the highest-weight unit in Culinary Foundations papers of NCHMCT/IHM, state hotel-management and AICTE-model B.Sc. Culinary Arts programmes, and it is the standard practical and technical-round test in campus placements for IHCL (Taj), Oberoi, ITC Hotels, Marriott, Hyatt, Accor, Radisson, Lemon Tree, cruise lines, QSR and cloud-kitchen central-production units. Interviewers ask for the five mother sauces and their derivatives, roux and liaison ratios, consommé clarification and the HACCP cooling and hot-holding rules under the Food Safety and Standards Act, 2006. Yield, portioning and food-cost arithmetic on stock and soup batches are examined as numericals and used daily in kitchen costing.

Explained

Stocks: types, ratios and method

• Definition: a clear, unthickened liquid flavoured by soluble substances extracted from bones, meat, fish or vegetables; it is a *base*, never a finished dish.
• Four basic ingredients: bones (flavour, gelatin), mirepoix (aromatic vegetables), acid/liquid (water, sometimes wine or tomato) and bouquet garni / sachet d'épices (herbs and spices).
• Mirepoix: 2 parts onion : 1 part carrot : 1 part celery by weight, usually 10% of bone weight. White mirepoix replaces carrot with leek, parsnip or celeriac so the stock stays pale.
• Sachet d'épices: parsley stalks, thyme, bay leaf, peppercorns, optional clove and garlic, tied in muslin. Bouquet garni: the same aromatics tied with leek and celery. Onion piqué: onion studded with bay leaf and clove (béchamel, velouté). Onion brûlé: onion halved and charred, for colour in consommé and brown stock.
• Types:
  1. White stock (fond blanc): blanched, unroasted veal/beef/chicken bones, white mirepoix, cold water. Simmer: chicken 3–4 h, veal/beef 6–8 h.
  2. Brown stock (fond brun / estouffade): bones roasted at about 200–220 °C until deep brown, mirepoix caramelised, tomato purée added (pinçage), roasting tray deglazed so the fond is recovered. Simmer 6–8 h.
  3. Fish stock / fumet: white-fish bones (sole, pomfret, bhetki) sweated in butter with white mirepoix, white wine added; simmer only 20–30 minutes — longer gives bitterness and glue.
  4. Vegetable stock: vegetables sweated, simmered 45–60 min; no starchy or strongly coloured vegetables (potato clouds, beetroot stains, brassicas turn sulphurous).
  5. Court bouillon: water + acid (vinegar, wine, lemon) + mirepoix + aromatics, simmered 20–30 min, used to poach fish and shellfish. Served as a light sauce it is a nage.
  6. Remouillage: "second wetting" — bones re-covered and simmered again; weak, used to top up or in place of water.
  7. Glace (glace de viande / de volaille / de poisson): stock reduced to roughly one-tenth of its volume, syrupy and setting firm when cold; used to reinforce sauces.
  8. Jus / jus lié: roasting juices, or stock lightly thickened with arrowroot or cornflour — the modern, lighter alternative to espagnole.
  9. Asian bases: dashi (kombu + katsuobushi, steeped not boiled), Chinese superior stock, Indian yakhni (mutton + whole spices) — examined in regional-cuisine papers.
• Ratio: classical 1 kg bones : 3–4 litres cold water (plus 100 g mirepoix); yield after 6–8 h is roughly 55–65% of water added.
• Rules (each one an exam point):
  • Start in cold water so proteins dissolve and rise as scum that can be skimmed; hot water sets albumin and clouds the stock.
  • Simmer, never boil (about 85–96 °C): boiling emulsifies fat and breaks up particles, giving a cloudy, greasy stock.
  • Skim and degrease continuously; never stir once it is clear.
  • Do not salt a stock — it will be reduced later.
  • Strain through a chinois and muslin, then cool fast and refrigerate or freeze.
• Faults: cloudy (boiled, unskimmed, stirred, starchy vegetables), greasy (not degreased), bitter (over-cooked fumet, charred bones), bland (too much water, too short a simmer), sour or ropy (held in the danger zone — *Clostridium perfringens* and *Bacillus cereus* grow in cooling stock, a classic FSSAI-flagged hazard).
• Why gelatin matters: collagen in knuckles, feet, shin and trotters hydrolyses to gelatin between about 70 °C and 90 °C over hours; gelatin gives body (mouthfeel) without any starch and is what lets a glace set.

Sauces: the classification and the mother sauces

• Functions: add moisture, flavour, richness and nutritive value; improve appearance and gloss; bind or coat; provide contrast.
• Three structural components: a liquid (stock, milk, tomato, butter/oil), a thickening agent, and seasoning/flavouring.
• Carême codified four grandes sauces (espagnole, velouté, béchamel, allemande); Escoffier gave the list taught today — five mother sauces, with allemande demoted to a derivative:

• Béchamel: scald milk with onion piqué, whisk into white roux, cook 20–30 min, strain, finish with nutmeg and white pepper. Never colour it.
• Velouté: blond roux + hot stock, simmered 45–60 min and skimmed; the name of the stock names the velouté (chicken, fish, veal).
• Espagnole and demi-glace: espagnole is brown stock + brown roux + mirepoix + tomato, simmered 2–4 h; demi-glace = equal parts espagnole and brown stock, reduced by half and strained. Most Indian hotel kitchens now run a jus lié instead — lighter, faster, gluten-free.
• Hollandaise: reduce vinegar/wine with crushed peppercorns and shallot; whisk yolks with the cooled reduction over a bain-marie to the ribbon stage (yolks thicken at about 65–70 °C — never above 80 °C or they scramble); mount with warm clarified butter in a thin stream; finish with lemon and cayenne. Hold at 55–65 °C for no more than 1–2 hours — it sits in the danger zone, so it is made in small batches and discarded, never reheated. Rescue a split sauce by whisking it into a teaspoon of warm water, or into a fresh yolk.
• Other contemporary sauces: beurre blanc (shallot + white wine/vinegar reduction mounted with cold butter, a butter-in-water emulsion), beurre monté, mayonnaise (cold yolk-lecithin emulsion; one yolk will hold up to about 200 ml oil), vinaigrette (3 parts oil : 1 part acid, a temporary emulsion), coulis (sieved fruit or vegetable purée), salsa, pesto, compound butters (maître d'hôtel, café de Paris), gastriques, and modern texturisers — xanthan gum at 0.2–0.5% and agar at 0.5–1.0% of liquid weight.
• Indian gravy bases used industrially alongside the classical five: makhani (tomato–butter–cashew), white gravy (cashew/melon-seed + curd/cream), brown onion gravy (fried onion paste), yellow/ korma base. Indian thickeners are nut and seed pastes, besan, fried onion, curd and reduced dairy rather than roux — a frequent comparison question.
• Faults and remedies: lumpy (hot liquid into hot roux, or no whisking — strain), raw-flour taste (roux or sauce undercooked — simmer 20 min), skin forming (cover with buttered paper or film on the surface), curdled cream/liaison sauce (boiled after the liaison), thin (reduce or add more thickener as a slurry, never dry flour), split emulsion (temperature shock or butter added too fast).

Thickening agents

• Tempering: add a ladle of hot liquid to the cold liaison/slurry first, then return the mixture — prevents curdling and lumps.
• Nappé consistency: the sauce coats the back of a spoon and a finger drawn through it leaves a clean line — the standard acceptance test in practicals.

Soups: classification, method and service

• Clear (unthickened):
  • Broth / bouillon: stock simmered with meat and vegetables, served with its garnish (Scotch broth, minestrone-style broths).
  • Consommé: a perfectly clear, double-strength, fat-free soup. Clarification uses a clearmeat (raft) — per litre of cold stock: about 150–200 g lean minced meat (or fish/poultry), 1 egg white, 75–100 g chopped mirepoix, chopped tomato and onion brûlé. Mix into cold stock, bring up slowly while stirring, stop stirring once the raft sets, simmer undisturbed at about 85 °C for 1–1½ h, make a hole for steam, strain through muslin, degrease with paper. Faults: cloudy (boiled or stirred, fat present), weak (stock too thin), poor colour (no onion brûlé).
  • Consommé garnishes: julienne, brunoise, royale (savoury custard dice), célestine (crêpe strips), vermicelli, profiteroles, Carmen, Madrilène (tomato, served jellied or cold), Brunoise, Xavier.
• Thick:
  • Purée: starchy vegetable or pulse puréed, needs no added thickener (potato–leek, dal shorba, lentil purée).
  • Cream: a velouté or béchamel base, puréed and finished with cream (cream of tomato, mushroom, spinach).
  • Velouté soup: blond roux base finished with a liaison.
  • Bisque: shellfish soup thickened classically with rice and the shells' flavour, finished with cream and brandy (prawn, lobster, crab).
  • Chowder: chunky, milk/cream-based, with potato and salt pork (New England clam chowder).
• Cold soups: gazpacho (Spain), vichyssoise (chilled potato-leek), chilled consommé madrilène, jal-jeera-style and curd-based Indian coolers; served at 7–10 °C.
• National soups (standard exam list): Mulligatawny (Anglo-Indian), Shorba / Dal shorba / Tomato shorba (India), French onion gratinée (France), Bouillabaisse (France), Minestrone (Italy), Borscht (Russia/Ukraine), Scotch broth and Cock-a-leekie (Scotland), Gumbo (USA), Miso and Hot-and-sour (Japan/China), Avgolemono (Greece), Harira (Morocco), Waterzooi (Belgium).
• Accompaniments: croûtons, cheese straws, melba toast, profiteroles, bread rolls, grated parmesan, flutes.
• Service standards: 150–180 ml as a course, 200–250 ml as a main or in a soup plate/tureen; served hot at about 65–70 °C in a warmed cup, cold soups well chilled in chilled service ware.
• Faults: too thick/thin, lumpy, greasy, over-seasoned after reduction, curdled (acid or boiling after dairy/liaison), faded colour in green soups (overcooked — purée green vegetables briefly and refresh).

Safety, standards and Indian practice

• Governing law: the Food Safety and Standards Act, 2006 and FSSAI regulations; every commercial kitchen needs an FSSAI registration or licence, and Schedule 4 of the Licensing and Registration Regulations, 2011 sets the general hygiene and food-safety management (GHP/GMP) requirements for catering. Supervisors are trained under FoSTaC; large units certify an FSMS to ISO 22000:2018 and work on HACCP principles.
• Temperature discipline for stocks and soups (the CCPs):
  • Danger zone 5–60 °C; cook/reheat to a core of at least 74 °C.
  • Hot-hold soups and sauces at 60 °C or above (many Indian FSMS plans use 65 °C as the working limit); hold hot no longer than the plan allows and never reheat a batch twice.
  • Two-stage cooling for stocks: 60 °C → 21 °C within 2 hours and 21 °C → 5 °C within the next 4 hours — use an ice paddle, ice bath, shallow pans or a blast chiller; never leave a stockpot on the range overnight.
  • Refrigerated stock keeps 3–4 days; frozen 2–3 months; a fat cap left on protects the stock until opened.
• Allergen declaration matters commercially: roux and velouté carry wheat gluten, béchamel and cream soups carry milk, bisques carry crustacean, liaison and hollandaise carry egg — declared under FSSAI's labelling and display requirements. Added monosodium glutamate (in bouillon cubes and soup powders) must be declared on the label and such products are not for infant foods.
• Industrial trans-fat limit: FSSAI caps industrially produced trans fat at 2% of total oils/fats, so hydrogenated vanaspati roux has largely given way to butter or refined oil in hotel kitchens.
• GST, for costing questions: restaurant service is taxed at 5% without input tax credit, while supply from "specified premises" (high-tariff hotels) is 18% with ITC; the rate slabs in force since 22 September 2025 are 5%, 18% and 40%.

Key points

• Stock - flavoured liquid from bones/trimmings + mirepoix + aromatics; a base, never served as is.
• Mirepoix - 2 onion : 1 carrot : 1 celery by weight, about 10% of bone weight; white mirepoix drops the carrot.
• Bone:water ratio - 1 kg : 3–4 L cold water; yield roughly 55–65% of water added.
• Simmer times - fish fumet 20–30 min, vegetable 45–60 min, chicken 3–4 h, veal/beef 6–8 h.
• Cold start, gentle simmer, no stirring, no salt - the four non-negotiable stock rules.
• Remouillage - second extraction from used bones; glace - stock reduced to one-tenth, sets when cold.
• Court bouillon - acidulated aromatic liquid for poaching fish; served as a sauce it is a nage.
• Five mother sauces - béchamel, velouté, espagnole, tomato, hollandaise (Escoffier); allemande is a velouté derivative.
• Demi-glace - equal parts espagnole and brown stock reduced by half; jus lié is the modern light substitute.
• Roux - equal weights fat and flour; white, blond, brown; 50/70/110 g per litre for thin/medium/thick.
• Starch gelatinisation - 60–80 °C; a flour sauce still needs 20 minutes' cooking out to lose raw taste.
• Liaison - 2 egg yolks + 100 ml cream per litre, tempered, held below 85 °C.
• Nappé - correct sauce consistency: coats a spoon, holds a finger line.
• Consommé clearmeat - per litre: ~150–200 g lean mince + 1 egg white + mirepoix + tomato + onion brûlé; start cold, simmer undisturbed 1–1½ h.
• Soup classification - clear (broth, consommé) and thick (purée, cream, velouté, bisque, chowder), plus cold and national soups.
• Portion - 150–180 ml as a course, 200–250 ml as a main; serve hot at 65–70 °C, cold at 7–10 °C.
• Food safety - danger zone 5–60 °C, reheat to ≥74 °C, hot-hold ≥60 °C, cool 60→21 °C in 2 h and 21→5 °C in 4 h, under the FSS Act, 2006 and Schedule 4.
• Faults - cloudy stock from boiling/stirring; curdled sauce from boiling after a liaison; split hollandaise from temperature shock.

Formulas and examples

Example 1 — Brown stock batch cost and yield (indicative Indian prices).

• Inputs: 10 kg beef/veal bones at ₹60/kg = ₹600; mirepoix 2 kg at ₹45/kg = ₹90; tomato purée 200 g = ₹30; fuel for 8 h = ₹150. Total = ₹870. Water added 40 L.
• Strained yield 24 L → yield % = 24 ÷ 40 × 100 = 60%.
• Cost per litre = 870 ÷ 24 = ₹36.25/L.
• Reduce 12 L of it (cost 12 × 36.25 = ₹435) to one-tenth = 1.2 L of glace; add ₹120 fuel → ₹555 for 1.2 L = ₹462.50/L, i.e. ₹4.63 for a 10 g enrichment in one sauce portion.

Example 2 — Medium béchamel for 200 portions of 60 ml.

• Batch needed = 200 × 60 ml = 12 L finished. Allow 10% evaporation → scald 13.2 L milk.
• Medium roux at 60 g/L of finished sauce = 12 × 60 = 720 g roux = 360 g flour + 360 g butter.
• Cost: milk 13.2 L × ₹60 = ₹792; butter 0.36 kg × ₹560 = ₹201.60; flour 0.36 kg × ₹45 = ₹16.20; onion piqué, nutmeg, seasoning ₹20. Total = ₹1,029.80.
• Cost per litre = 1,029.80 ÷ 12 = ₹85.82/L; per 60 ml portion = ₹5.15.
• To convert to Mornay, add 150 g grated cheese and 1 yolk per litre off the heat: cheese 1.8 kg at ₹480/kg = ₹864 → new batch cost ₹1,893.80 → ₹9.47 per portion.

Example 3 — Consommé: clearmeat quantities, yield and food cost.

• For 20 L of cold brown stock (cost 20 × ₹36.25 = ₹725): mince at 150 g/L = 3 kg (₹300/kg = ₹900); egg whites at 1/L = 20 whites (20 eggs at ₹7 = ₹140); mirepoix at 75 g/L = 1.5 kg (₹45/kg = ₹67.50). Total = ₹1,832.50.
• Loss to the raft, evaporation and straining ≈ 20% → finished 16 L; cost per litre = 1,832.50 ÷ 16 = ₹114.53.
• At 200 ml a portion: 16 ÷ 0.2 = 80 portions at ₹22.91 each.
• Sold at ₹180 → food cost % = 22.91 ÷ 180 × 100 = 12.7% — well inside the 28–35% target, which is why consommé stays on banquet menus.

Example 4 — Yield test on pomfret, and the fumet it pays for.

• Purchase 5 kg whole pomfret at ₹600/kg = ₹3,000. Filleting yield 45% → 2.25 kg fillet.
• Usable cost = 3,000 ÷ 2.25 = ₹1,333.33/kg of fillet (not ₹600 — the standard trap).
• By-product: 1.6 kg of bone and head. With 160 g white mirepoix, 100 ml white wine, 40 g butter and 5 L water, simmer 25 min → about 4 L fumet at effectively only the cost of the aromatics (≈ ₹120) = ₹30/L, which is the whole economic argument for making fumet in-house.

Example 5 — Hollandaise for 20 covers, and the holding rule.

• 40 g a cover → 800 g of sauce. Butter is about 90% of the weight: use 12 yolks and 720 g clarified butter (60 g butter per yolk) plus 50 ml reduction and lemon.
• Clarification yield from butter ≈ 78% → raw butter needed = 720 ÷ 0.78 = 923 g (round to 925 g).
• Cost: 0.925 kg × ₹560 = ₹518; 12 eggs × ₹7 = ₹84; reduction and seasoning ₹20 → ₹622 for 20 covers = ₹31.10 per cover.
• Hold at 55–65 °C for a maximum of 1–2 hours and discard the remainder; it cannot be refrigerated and reheated.

Where it is used

• Hotel hot kitchens: the *saucier* (and in large brigades a dedicated *potager* for soups) runs stock-pots, mother sauces and the daily soup — the station graduates are placed into at IHCL, Oberoi, ITC, Marriott, Hyatt and Radisson properties.
• Banqueting and large-volume catering: consommé and cream soups are costed and batch-produced for 500–2,000 covers at Indian weddings and conferences; stock yield and two-stage cooling are the audited control points.
• Central production units and cloud kitchens: standardised gravy bases (makhani, white, brown onion) and chilled or frozen stock concentrates are produced centrally for multi-outlet brands and QSR chains, under ISO 22000/HACCP plans.
• Food manufacturing and R&D: soup powders, cubes, pastes, retort and tetra-pack soups (Knorr, Maggi, ITC, MTR, Chings) — product development, sensory evaluation and FSSAI label compliance roles.
• Cruise lines, airline catering and QSR commissaries (TajSATS, Oberoi Flight Services): soups and sauces are produced to a recipe card, blast-chilled and reheated, so core-temperature records are mandatory.
• Teaching, costing and quality roles: IHM and private culinary-school instructors, F&B cost controllers using yield tests and portion costs, and FSSAI-notified food-safety supervisors auditing cooling and hot-holding of bulk soup.

Interview questions

• Q: Name the five mother sauces and their liquid and thickener. A: Béchamel (milk, white roux), velouté (white stock, blond roux), espagnole (brown stock, brown roux with tomato), tomato (tomato with stock) and hollandaise (clarified butter emulsified with egg yolk).
• Q: Why must a stock be started in cold water? A: Soluble proteins dissolve gradually and coagulate into scum that can be skimmed, giving a clear stock; hot water sets them inside the liquid and clouds it.
• Q: Why should a stock never boil? A: Boiling agitates and emulsifies fat and fine particles into the liquid, making it cloudy and greasy, and extracts bitter compounds — simmer at about 85–96 °C.
• Q: What is the difference between a stock and a broth? A: A stock is made mainly from bones, is unseasoned and is a base; a broth is made with meat and vegetables, is seasoned and is served as a soup.
• Q: How do you make a consommé and why must you stop stirring? A: Mix a clearmeat of lean mince, egg white, mirepoix and tomato into cold stock, raise the heat slowly, then simmer undisturbed 1–1½ hours; once the raft sets it filters the liquid, and stirring breaks it up and reclouds the soup.
• Q: Demi-glace versus jus lié? A: Demi-glace is equal parts espagnole and brown stock reduced by half — roux-based and long-cooked; jus lié is brown stock thickened lightly with arrowroot or cornflour, faster, lighter and gluten-free.
• Q: What is a liaison and what is the danger with it? A: Egg yolks with cream, about 2 yolks and 100 ml cream per litre, used to enrich; it must be tempered with hot liquid and the soup kept below about 85 °C or the yolks curdle.
• Q: Your hollandaise has split — what do you do? A: Whisk the broken sauce slowly into a teaspoon of warm water, or into a fresh yolk warmed over a bain-marie, re-emulsifying it bit by bit.
• Q: Which mother sauce makes a bisque, and what thickens it? A: A bisque is not from a mother sauce — it is a shellfish soup built on the shells and classically thickened with rice (or a roux in modern kitchens), finished with cream and brandy.
• Q: What are the FSSAI temperature rules you would follow for a 20-litre stock at the end of service? A: Cool it through the danger zone fast — 60 °C to 21 °C within 2 hours and 21 °C to 5 °C in the next 4 hours, using an ice bath, ice paddle, shallow pans or blast chiller — then refrigerate at or below 5 °C and reheat to a core of at least 74 °C.
• Q: Why does a brown roux thicken less than a white roux of the same weight? A: Prolonged cooking dextrinises and breaks down some of the starch, so more brown roux is needed for the same consistency.
• Q: Which fish bones should not go into a fumet and why? A: Oily fish such as mackerel, sardine or salmon, and any bones with gills, blood or viscera — they give a strong, bitter, cloudy fumet; use lean flat-fish and white-fish frames.

Common mistakes

• Salting a stock or a sauce before it is reduced, so the finished glace or demi-glace is inedibly salty.
• Boiling the stockpot or stirring a clarifying consommé, then being unable to explain the cloudiness.
• Adding hot liquid to a hot roux, or dry flour to a thin sauce, producing lumps instead of whisking in a tempered slurry or beurre manié.
• Serving a sauce that still tastes of raw flour — the roux or the sauce was not cooked out for 20 minutes.
• Boiling a soup after the cream or liaison goes in, which curdles it; and overcooking green purées so the colour fades.
• Using purchase price instead of usable cost per kilogram in costing, so the yield loss on fish, poultry and vegetables is never recovered in the selling price.
• Leaving the stockpot on the range or on a counter to cool overnight — the single most commonly cited hygiene failure in kitchen audits under the FSS Act, 2006.

Related topics

Kitchen organisation and hygiene · Culinary foundations: knife skills and cooking methods · Butchery and fish fabrication · Food chemistry: carbohydrates, proteins and fats · Larder and garde manger · Food costing, menu engineering and portion control · Indian regional cuisine and gravy bases