Preheat oven to 200 degrees.

Using a mandolin or a knife cut about 1/8" thick (or as thin as possible).

Place a silicone mat or piece of parchment paper on 2 baking sheets. Arrange apple slices on the prepared baking sheet.

Bake for 1 hour then flip each apple slice. Bake for 1 more hour.

Remove from oven to let them cool then enjoy!