How to make dried orange slices in the oven for decorating for Christmas, crafts, or potpourri.
First, slice the oranges to make round slices. You want to slice them fairly thin, but you also want them to not fall apart. Most of mine ended up about 1/4 of an inch thick. Some were a little thicker than this, but they still worked. The thing is, the thicker your slices are, the longer it will take them to dry.
Set the cooling rack directly on the oven rack in the preheated oven. You can also place the rack on a cookie sheet if your oranges are dripping.