Religieuse

A nineteenth-century Parisian choux pastry. A widely repeated story holds that it was created around 1856 at the Café Frascati in Paris by a pastry-maker of Neapolitan origin named Frascati, but this attribution is poorly documented and sits awkwardly with the café's own history: the Maison Frascati had lost its famous gaming rooms under the Restoration and the building was demolished in 1847, so it could not plausibly have launched a new pastry around 1856. The name itself — religieuse, French for a nun — is taken to describe the silhouette: the large lower puff reads as the body and skirt, the small upper puff as the head, and the piped cream collar as a nun's white collar. The word in this pastry sense enters general reference works only in the early twentieth century (the Petit Larousse first appeared in 1905). Early religieuses are described as squarish, with the rounded stacked form spreading after the piping bag came into common pastry use.

The shell should shatter thinly and crisply at first bite, then give way to a cool, dense, glossy filling. A good crème pâtissière is smooth and spoon-thick with no grain of curdled egg and no raw-starch chalkiness; the coffee or chocolate flavour should read clearly, backed by the soft sweetness of the fondant on top. A poor one is either soggy (the shell gone limp from filling too early) or cloying (over-thick fondant burying the choux). The buttercream collar adds a richer, fattier note between the two puffs.

Choux paste contains no chemical leavening; it rises on steam. Flour is first cooked with water and butter so its starch gelatinises and can hold water, then eggs are beaten in. In the oven the water flashes to steam and inflates the moist paste, while egg proteins — chiefly albumin — coagulate and set the expanded walls into a rigid hollow shell. The filling, crème pâtissière, is thickened by both egg yolk and starch: cornstarch releases amylose that coats the egg proteins and buffers them, letting the cream be brought to a boil without the yolks scrambling, where a starch-free custard would curdle past about 85°C. The fondant glaze is a sugar syrup worked until it crystallises into a fine, opaque, satiny mass that sets firm on top.