Also known as: 黒い森のケーキ, シュヴァルツヴェルダー・キルシュトルテ
A type of Cake originating in Germany, made by layering chocolate sponge cake with Whipped Cream and cherries and topping with maraschino cherries. Traditionally, kirschwasser brandy is used to flavor the sponge cake.
Notably the particular variety of cake featured in Portal 1.