This variation of the Viennese Sachertorte has only a very tenuous link with the Czech capital. The recipe was developed by the same legend of Russian confectionary, Vladimir Guralnik, who learned the art of patisserie under the guidance of Czech master-confectioners who made regular trips to Moscow to teach and learn new skills. The cake requires four different sorts of cream, some laced with brandy and other liquors, and the pastry layer is soaked in rum. The original Viennese cake does not contain any cream at all. Unlike Birds’ Milk cake, the recipe for Prague cake was never patented and the delicacy is now prepared in patisseries all over Russia.