For best results, ensure the cranberries are fully coated in syrup and have enough time to dry before rolling them in the superfine sugar. This will help the sugar adhere properly and create a delightful, frosted appearance. If you don't have superfine sugar, you can make your own by processing granulated sugar in a blender or food processor until fine. Sugared cranberries are perfect for snacking or as a garnish for desserts and cocktails.