This rum cake is inspired by island ingredients and adds coconut, peaches, lime, ginger and honey to a traditional rum cake. Crystalized ginger is sweetened ginger and is great in baked goods. It can be purchased in many specialty stores and in spice aisles of most supermarkets. You may use a dark rum, if preferred. *Caution, if you are using a cake mix that already has pudding in it, omit the box of pudding in the recipe.