You will need to preheat oven to 250 degrees.
Slice apples as thin as you would like them to be.
Line your cookie sheets with wax paper.
Spread apple slices on the cookies sheets.
Sprinkle apples with either cinnamon or a pumpkin pie spice.
Bake for 1 hr to 1:20 minutes.
Remove from oven and cool before putting them in a tightly sealed bag or container for storage.