No matter what citrus you have, you can easily learn how to make dehydrated citrus slices in just a few simple steps. The best garnish for cocktails and desserts!
Preheat oven to the lowest temperature your oven can go — mine was 170°F (77°C).
Line a baking sheet (or two) with parchment paper.
Slice each citrus fruit thinly into ⅛-inch pieces. Arrange slices on the parchment lined sheet. They can touch but it's ideal not to overlap them a lot. A little overlap is okay as the slices will shrink in the oven.
Bake in the oven for 3 to 4 hours — the time will vary based on your oven, the temperature, the size of your fruit and how thin they are sliced. Check every hour and rotate the pan. If any of the slices begin to curl, flip them to encourage them to flatten.
When the slices are completely dried, remove them from the oven and let cool completely overnight.
Store in an airtight container in a cool, dry place. If stored properly, dehydrated citrus slices will keep for up to two years.
Notes
Citrus slices turn brown or black the longer you cook them in the oven. To achieve a lighter color, monitor the cooking time and check them every 15 minutes beginning during hour two. You can use any kind of citrus, such as grapefruit, kumquats or key limes. Depending on the circumference of the slices, you may need to adjust the cooking times. Big orange slices will take a smidge longer than smaller lime slices.