Opera Cake is a type of French cake

Cake

Cake is a form of bread or bread-like food. In its modern forms, it is typically a sweet and enriched baked dessert. In its oldest forms, cakes were normally fried breads or cheesecakes, and normally had a disk shape...

. It is made with layers of almond sponge cake

Sponge cake

Sponge cake is a cake based on flour , sugar, and eggs, sometimes leavened with baking powder which has a firm, yet well aerated structure, similar to a sea sponge. A sponge cake may be produced by either the batter method, or the foam method. Typicially the batter method in the U.S. is known as a...

 (known as Joconde in French) soaked in coffee

Coffee

Coffee is a brewed beverage with a dark,init brooo acidic flavor prepared from the roasted seeds of the coffee plant, colloquially called coffee beans. The beans are found in coffee cherries, which grow on trees cultivated in over 70 countries, primarily in equatorial Latin America, Southeast Asia,...

 syrup, layered with ganache

Ganache

Ganache is a glaze, icing, or filling for pastries made from chocolate and cream.Ganache is normally made by heating cream, then pouring it over chopped dark semi-sweet chocolate...

 and coffee buttercream, and covered in a chocolate glaze. According to Larousse Gastronomique "Opéra gateau is an elaborate almond sponge cake with a coffee and chocolate filling and icing." The cake was popularized by the French pâtisserie house Dalloyau

Dalloyau

Dalloyau is a Paris-based food company whose history goes back to 1682 and the Versailles Court. Dalloyau is a family-owned and independent business, Nadine Gavillon-Bernardé is the current president since 1993. The company is member of the "Comité Colbert" since 2001. Dalloyau opened its first...

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