Passage: Typically, Black Forest gateau consists of several layers of chocolate sponge cake sandwiched with whipped cream and cherries. It is decorated with additional whipped cream, maraschino cherries, and chocolate shavings. In some European traditions, sour cherries are used both between the layers and for decorating the top. Traditionally, kirschwasser, a clear spirit made from sour cherries, is added to the cake. Other spirits are sometimes used, such as rum, which is common in Austrian recipes. In India, Black Forest gateau is generally prepared without alcohol. German law mandates that kirschwasser must be present in the cake for it to be labelled a Schwarzwälder Kirschtorte.

Question: what is the black Forest gateau decorated with usually?
additional whipped cream, maraschino cherries, and chocolate shavings