Fond Brun — Brown Veal Stock

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Brown veal stock is the dark engine of the classical French sauce kitchen — the liquid from which demi-glace, espagnole, and every brown sauce ultimately derives. Its distinction from white stock is roasting: the veal bones (knuckle joints preferred for maximum collagen, marrow bones for richness) are roasted at 220°C until deeply caramelised, turned twice during roasting for even colour. The mirepoix is roasted separately in the same oven, and a tablespoon of tomato paste is added to the vegetables in the last 10 minutes — the paste caramelises and adds both colour and umami without the acidity of fresh tomatoes. The roasted bones and vegetables are transferred to the stock pot, and the roasting pan is deglazed with water or wine on the stovetop, scraping every fragment of fond. This deglazing liquid goes into the pot. Cold water covers the bones by 5cm, and the pot is brought slowly to a bare simmer — 85-90°C, the surface barely trembling. The stock simmers for 8-12 hours, skimmed every 30 minutes. Extended extraction is necessary because veal bones yield their collagen more slowly than poultry. The finished stock should be deep mahogany, clear beneath its colour, and set to a rubber-firm gel at 4°C. A fond brun that does not gel is inadequate for sauce work. Yield is typically 4-5 litres from 5kg of bones — accept the low yield; flavour and body cannot be achieved through dilution.

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