01 -
Set oven temperature to 225°F (107°C) and prepare a baking sheet by lining it with parchment paper.
02 -
Using a mandoline slicer or sharp knife, slice the apple into very thin, even rounds.
03 -
Place apple slices in a single layer on the lined baking sheet, ensuring slices are not overlapping.
04 -
Lightly spray the apple slices with vegetable oil cooking spray, then evenly sprinkle ground cinnamon over them.
05 -
Bake in the preheated oven for 1 hour, flip slices carefully, and bake for an additional 1 hour or until completely crisp.
06 -
Remove baked apple chips from the oven and allow to cool on the baking sheet to achieve maximum crispness before serving.