Making Chiboust

Call it chi-BOOST, call it she-BOO, it’s a sweet, light and delicate filling either way. Pastry cream lightened with Italian meringue is what it is, and it works well in just about any context where you want a large volume of filling, but don’t want to overwhelm the eater with richness or heaviness. A Paris-Brest is a good example, or a Gâteau St. Honoré. Bear in mind that chiboust — like most meringues — doesn’t like humidity. And while it can be piped, pipe it only through large-bore nozzles, since constriction and pressure causes it to deflate and go runny. Here I have about a cup of the firmer of the two pastry creams that are up on the site.