Step 1

Wash blueberries with water in a colander. Pick out stems and bad berries to compost.

Step 2

Put blueberries in boiling water for 30 seconds. The skins will start to crack. Remove them with a slotted spoon or spider strainer.

Step 3

Put the blueberries in ice water for 30 seconds.

Step 4

Remove the berries and let dry.

Step 5

Dehydrator:  Place the blueberries on the dehydrator trays in a single layer.   Set the temperature to 115 degrees Fahrenheit. If your dehydrator does not have a temperature control, just turn it on.  Let the blueberries dry for 18 to 24 hours. Keep an eye on them, especially around the 18 hour mark.

Step 6

Oven:  Like a cookie sheet with parchment paper. Add a layer of blueberries.  Bake at 135 degrees Fahrenheit for 10 hours.  You can also heat at 200 degrees Fahrenheit for 7 hours so you can get them done in one day, but keep a careful eye on them.

Step 7

Air Fryer: Place the prepared blueberries on the tray of the air fryer. They should be a single layer and not crowded.  Set the temperature to 120 degrees Fahrenheit. Let cook for 15 hours. Check them often after 10 to 12 hours.