Wash & Dry The Cranberries. Sort through the cranberries and discard any wrinkled, bruised, or spoiled cranberries. Wash the rest of the cranberries in a colander and let them dry on a clean kitchen towel.
Prep Your Pan. Place a wire cooling rack over a cookie sheet. This will allow the cranberries to dry and set with good air circulation, and the sheet pan will catch all the drips and spills! (If you want even easier clean-up, you can line the sheet pan with parchment paper.)
Make The Simple Syrup. In a small or medium saucepan, combine sugar and water. Heat and stir over medium heat until the sugar dissolves completely. (No need to boil or simmer.) Cool to room temperature.
Coat The Cranberries. Working in batches, add the cranberries to the simple syrup and stir to coat well with the syrup mixture. Use a slotted spoon to transfer the coated cranberries to your prepared wire rack. Repeat until all cranberries are coated in the syrup. (You can save the rest of the syrup to use for mocktails, cocktails, or more cranberries another day!)
Dry Until Tacky. Let the cranberries dry on the cooling rack for at least 45-60 minutes. You want them tacky/sticky but not wet, or the sugar will just dissolve.
Roll In Sugar. Place the rest of the sugar in a bowl and, working in batches, roll the cranberries in sugar. You can do this with a slotted spoon, a fork, or clean hands (the easiest). Transfer sugar covered cranberries back to the cooling rack to dry & repeat with all the remaining cranberries until they're all sugar-coated.
Serve Or Store. Add to drinks, cakes, dessert plates and more, or store at room temperature up to 1 week. I recommend storing uncovered or lightly covered with some air circulation, rather than packaging them tightly in an airtight container.