Bombe Richelieu

Bombe Richelieu (a rum-lined coffee ice bombe) teaches the architecture of a bombe: the outside must set before the centre goes in. The one true thing to know before touching a pan is that rum lowers the freezing point. The shell will always be softer than plain ice, so it needs a long, undisturbed freeze before the coffee filling comes anywhere near it.

The original assumed rum ice and coffee Bombe-preparation waiting in separate freezers, a confectioner's mould packed in salted ice, and a tray of coffee drops ready for service. At home, one small batch of rum ice, a freezer-cold metal bowl, an electric mixer, and purchased coffee fondant drops do the same work. The salted-ice chest and its constant repacking were brigade scaffolding, so they go. The rum shell, coffee pâte à bombe, and coffee drops added after turning are the dish itself, and they stay exactly where they belong.

If the rum ice slides while you line the mould, stop and chill both mould and ice until they are firm enough to hold. Ça se rattrape. This is one cook, one stove, one evening of active work, followed by the cold doing its part overnight. Freezing the completed shell until it feels hard beneath your fingertip is the step that matters most.