Preheat oven to 200°F (95°C)**. Line two baking sheets with parchment.

Wash the apples. Remove the core. Slice thinly (aim for 1/8th inch thick or about the thickness of a toonie***). Place apple slices on the parchment in a single layer, making sure they don’t overlap.

If making the cinnamon apple chips, combine sugar and cinnamon in a small bowl. Sprinkle the cinnamon sugar over the apple slices before baking.

Bake 2 hours. The apples edges will have curled and the fruit will be leathery. Don’t worry. They will crisp up after they’ve cooled. With the pans still in the oven, turn off the heat, stick a spoon in the oven door to leave it open a crack, and let cool about a half hour.

Eat straight away and store leftovers in a sealed plastic bag.