1 small apple (I used a Gala)
1 cup sugar
1 cup water
Preheat oven to 350 F. Place a wire rack inside of a rimmed baking sheet and spray the rack lightly with nonstick cooking spray.
Cut the apple into very thin slices (about 1/16-inch, I used a mandoline). You don’t need to worry about coring or peeling the apple, though you’ll want to remove any seeds from the slices.
Add the sugar and water to a 3-qt saucepan and bring to a boil, stirring frequently. Add the apple slices and cook, stirring frequently, for about 10 minutes, or until they are translucent and the syrup has reduced and thickened slightly. Use tongs to remove the slices from the syrup and place them on the wire rack in a single layer. (You can discard the syrup or save it – it’s amazing apple-flavored simple syrup!)
Bake the apples for about 15-20 minutes, or until they’re golden in color. The baking time will vary depending on the thickness of your apple slices – I found the best indicator of doneness to be color. Don’t be concerned if the slices aren’t crisp when they become golden – mine definitely weren’t – the chips will crisp as they cool. Transfer the chips to a sheet of waxed paper lightly coated with nonstick cooking spray and let them cool completely, it’ll only take about 10 minutes.