Ground cinnamon to taste
Preheat oven to 220 degrees. Line two baking sheets with parchment paper and set aside. Cut the apples into thin slices. Spread the apple slices on the baking sheets, making sure you have no overlapping edges (if they overlap, they will stick to each other and won't dry properly). Sprinkle some cinnamon on top and place in the oven to cook for one hour; then flip the slices over and cook for another hour. Let the chips cool down and serve.
Recipe Credit: PaleoLeap