Mousse de Jambon — Cold Ham Mousse

Mousse de jambon is a cold emulsified preparation built on a base of finely puréed cooked ham (Sus scrofa domesticus), bound with velouté or béchamel, stabilized with gelatin, and lightened with whipped cream (crème fouettée). The foundational ratio follows approximately 500 g puréed ham to 250 ml reduced velouté, 10–12 g bloomed sheet gelatin (180 bloom), and 300 ml heavy cream (35% butterfat minimum) whipped to soft peaks. The ham — ideally a jambon blanc or York-style ham with a lean-to-fat ratio of approximately 85:15 — is passed twice through a fine die on a meat grinder, then processed in a food processor with the warm velouté until the mixture achieves a completely smooth purée with no discernible fibers. The dissolved gelatin is incorporated at 35–38°C while the base is still slightly warm. The mixture is then cooled over an ice bath to approximately 18–20°C — cool enough to accept the cream without deflating it, yet warm enough to prevent premature gelatin setting. The whipped cream is folded in three additions using a large balloon whisk or spatula, preserving maximum aeration. The mousse is piped or spooned into lined dariole moulds, ramekins, or a terrine form and refrigerated at 2–4°C for a minimum of 4 hours to achieve a full set. Unmoulded mousse should hold its shape firmly while yielding a smooth, airy texture on the palate that dissolves without graininess. It is traditionally served on a mirror of aspic with cornichons, Dijon mustard, and brioche toasts.