This has been an old-time family favorite recipe for many years. I have made these with not only regular rum but coconut flavored rum, bourbon, brandy, amaretto, kahlua...etc. I generally use walnuts but pecans, macadamia or almonds are also good. These are best if they sit a few days in a tightly covered container before eating. They also freeze well. Cooling time is not included in the PREP/COOKING time. Please allow 30 minutes to cool before rolling cookies into balls. FOR ADULTS ONLY, so please make sure you keep these away from the little ones.