A friend set me the challenge to make a Tortuga rum cake. Research showed that this is a traditional cake from the Cayman Islands. Most recipes listed use American measurements and ingredients that are not available in England. This recipe is using imperial measures. It should be made in a bundt pan but mine was made in a savarin mould (looks just as good). It is VERY alcoholic, only needing a small slice. Cake is a dense texture and heavy because of rum content! Friend was amazed at close similarity of cake.