Apples are easy to freeze dry, and freeze drying extends the life of the fruit. There is no reason for the abundant crop of fruit from your apple trees to go to waste when freeze drying takes just a little bit of time and effort. The process is simple and does not require expensive supplies or equipment.
Cut the apples into slices, making them as thin as possible. Thick slices take longer to process.
Arrange the slices in a single layer on the rack or tray, then put it in the freezer. A cake rack works best because air circulates through it. Move fast, or the slices will discolor before you get them in.
Keep the apples slices in the freezer for 30 minutes, then open it and check on the apples. They should be frozen solid. Leave the apples in the freezer.
Check the apples periodically over the next week. It takes about seven days for apples to become completely dry.
Take one slice out and let it thaw. If it turns black, the batch is not ready. Leave them alone and test again the next day.
Store freeze-dried apples in air-tight containers. Eat the apples the way they are once they're fully freeze-dried, or reconstitute them by putting the slices in a bowl and adding a little hot water.