Line two baking sheets with parchment paper and set aside.
Cut the apples into thin slices.
3 apples
Spread the apple slices on the baking sheets, making sure you have no overlapping edges (if they overlap, they’ll stick to each other, and they won’t dry properly).
Sprinkle some cinnamon on top and place in the oven.
Ground cinnamon
Place in the oven to dry for 1 hour then flip the slices and cook for another hour.