Opera Cake

Opera cake is a layer cake of disputed origin. The most widely received account credits Cyriaque Gavillon of the Parisian house Dalloyau in 1955: he is said to have composed a thin, multi-layered cake of almond sponge, coffee, and chocolate, and his wife Andree — an opera enthusiast — remarked that its layered elegance recalled the auditorium of the Palais Garnier, giving the dessert its name. Dalloyau still claims the recipe and has carried it worldwide. The story is not settled, however: a rival tradition names the chef Louis Clichy, who is said to have presented a cake of the same construction at the 1903 Exposition Culinaire in Paris, calling it the Clichy, and Gaston Lenotre later claimed a version of his own. Whoever first assembled it, the modern standardized form is Dalloyau's.

A forkful cuts cleanly through six thin layers: a near-black mirror-glaze top, a film of soft ganache, a coffee-soaked almond sponge, a stratum of coffee buttercream, and the sequence repeated. The sponge is damp with coffee, the buttercream dense and faintly bitter, the ganache deep and slightly grainless; the whole is markedly thinner than it is tall.

Opera cake is built as a stack of thin, distinct layers held together by their fillings. The sponge is a joconde — almond meal beaten with whole eggs to a ribbon, then folded with clarified butter and a small amount of flour; baked thin, it is pliable enough to soak up coffee syrup without collapsing. Coffee syrup is applied generously while the sponge is warm, displacing the cell structure with flavored liquid. The buttercream is an Italian meringue–based cream flavored with espresso: hot sugar syrup whipped into egg whites sets a stable foam, which is then emulsified with softened butter to a smooth, pipeable mass that holds its layer shape at room temperature. The ganache is an emulsion of dark chocolate and hot cream that sets firm but yielding; poured as the top layer and chilled, it forms the mirror surface.