Gâteau opera

In its original form, gâteau opera combines coffee-flavored buttercream, chocolate ganache, and layers of biscuit Joconde—a light almond sponge that is infused with coffee syrup or Grand Marnier liqueur. Each cake is topped with a thin layer of chocolate ganache and is usually decorated with a symbol of a note, musical instruments, or merely the word opera written in chocolate.

Although there are many conflicting stories of its origin, it is believed that the cake was invented at the Parisian patisserie Dalloyau by a pastry chef named Cyrique Gavillon. At the time, this sophisticated dessert was considered a novelty, compared to the lavishly decorated classics that were popular at the time.