Preheat oven to 240 degrees Fahrenheit.

Core each apple and slice thin with a mandolin slicer if you have one. I use my Ninja to slice them or just cut them with a knife.

In a shallow dish, like a pie plate, mix cinnamon and sugar together.

Place apple slices in dish and toss to coat with cinnamon and sugar mixture.

Place slices on metal baking sheet and bake for 2 hours or until edges curl and chips are dry.

Transfer to wire rack to cool and completely dry before serving.

Store extras in an airtight container.