Sachertorte is probably the most famous chocolate cake in the world. The “original Sacher torte” was created in 1832 for Prince Klemens Von Metternich, by the sixteen-year-old pastry apprentice Franz Sacher. The recipe is a well-kept secret, known only to the staff at the Sacher Hotel in Vienna, Austria. The cake consists of chocolate sponge, apricot jam filling, and chocolate glaze.