fumer

French fumer means to smoke, to emit vapor. Fumet — used for the aromatic vapor of food, and then for the concentrated stock that produces such vapors — came into French culinary vocabulary in the 17th century. A fumet de poisson (fish fumet) is a quickly made stock from fish bones, white wine, and aromatics, cooked only 20 to 30 minutes — much shorter than meat stocks, because fish bones release their gelatin and flavor rapidly and then turn bitter if cooked longer.

The vapor rising from fish stock is different from the steam of plain water. It carries the volatile aromatic compounds of the fish, the wine, the herbs — a complex sensory announcement of what is cooking. The French culinary tradition took this sensory observation and embedded it in the stock's name: fumet, smoke-vapor, the rising presence of flavor. The name captures the moment before the eating.

Game fumets — reductions of venison, pheasant, or hare stock — are also called fumets, emphasizing the concentrated aromatic quality of well-reduced game stock. The fumet de gibier (game fumet) is essentially the essence of the animal, reduced and intensified. In both cases, the smoke metaphor points to the volatile, aromatic, fleeting quality — the breath of the food before consumption.

In modern professional kitchens, a proper fumet is made in 20 minutes, strained immediately, and used fresh or frozen within days. Overcooking ruins it. The Escoffier tradition held that stocks were the soul of cooking; fumets were the most volatile soul — the quickest to form, the most easily lost. Speed and attention are what fumet requires. The smoke rises fast and goes.