Preheat oven to 200°.
Wash citrus. Thinly slice citrus using a sharp knife. Remove seeds from the sliced citrus.
Line a cookie sheet with parchment paper. Place citrus slices on the parchment paper. Once the baking sheet is fully covered, place in the oven's center rack.
Depending on the citrus type, the bake time will vary. Limes, lemons and tangerines will dry in two to three hours. Oranges and grapefruit will dry in three to four hours.
Halfway through the bake time, open the stove and flip the citrus slices.
After the slices have dried for their designated time, remove them from the oven and place on a wire cooling rack.
Allow the citrus slices to cool for a couple of hours before adding to cocktails. Cool citrus slices for 12-24 hours before using in crafts. Store any remaining citrus slices in airtight containers.