Rum balls are truffle like confection, being sweet dense balls flavoured with chocolate and rum. They are roughly the size of a golf ball and often coated in chocolate sprinkles, desiccated coconut, or cocoa.To make a rum ball, the cake (or biscuit) material is crushed and mixed with cocoa and a moist binding ingredient, such as jam or condensed milk. Other optional ingredients can also be added, such as nuts. When the mixture holds together firmly, it is rolled into balls and then coated.Rum balls are a popular Christmas snack in Australia, Canada, New Zealand and Austria. They can be made as childrens' snacks without the rum, or alternatively, moon balls. Another popular variation is 'Snowballs', they are the same recipe, with a Marshmallow in the center, and without the rum.