The only problem with this recipe is that it smells like you’re baking an apple pie, and then you realize you don’t have an apple pie, so you need to make an apple pie.
Now you know.
Slice the apples as thin as you can get them. They don’t need to be peeled or cored, but do discard any seeds.
Put them on a parchment paper-lined baking sheet. (I’ve tried other things – parchment is the way to go here.)
Sprinkle with cinnamon and sugar. You can skip this, but why would you want to?
Bake at 225 for 2-3 hours. To test, take one out of the oven and let it sit for 2 or 3 minutes. At that point it should be crunchy, not chewy.
Store in an airtight container.