The French pan sauce — deglazed from the fond (the caramelised residue left in the pan after roasting or sautéing) — is the most efficient transformation of flavour in cooking: the Maillard compounds and reduced proteins adhering to the pan are dissolved by a liquid (wine, stock, or both), producing a concentrated, complexly flavoured sauce in minutes.
- **The fond:** The dark residue adhering to the pan after searing or roasting. This is not burning — it is concentrated Maillard compounds. The darker it is (without being black), the more concentrated the flavour. - **The deglaze:** Pour the deglazing liquid (wine, stock, or spirits) into the hot pan. The immediate sizzle dissolves the fond from the pan surface. - **The scraping:** A wooden spatula used to release the fond from the pan base as the liquid boils — the scraping action dissolves the compounds into the liquid. - **The reduction:** The deglazing liquid is reduced over high heat until it reaches sauce consistency — coating a spoon. - **Monter au beurre:** Cold butter beaten into the reduced sauce off heat — produces the gloss and richness of classic French pan sauce.
The Complete Robuchon