A rum cake is a type of dessert cake which contains rum. In most of the Caribbean, rum cakes are a traditional holiday season dessert, descended from the holiday puddings (such as figgy pudding). Traditionally, dried fruit is soaked in rum for months and then added to dough prepared with sugar which has been caramelized by boiling in water. The result, also known as "black cake", is similar to a fruitcake, with a lighter texture. In St.