Preheat the oven to 450 degrees Fahrenheit.
Peel a large sweet potato with a vegetable peeler.
Use a vegetable slicer or mandolin to slice the sweet potato into paper thin rounds.
Spray a baking sheet with cooking spray and arrange the sweet potato slices on top.
Lightly coat the tops of the sweet potato slices with a spritz of cooking spray.
Bake the sweet potato chips in the oven at 450 degrees Fahrenheit for 10 to 15 minutes, flipping the chips on the baking sheet after 7 minutes.
Remove the chips to a wire rack until they become cool and crisp.
Sprinkle on salt and pepper to taste before serving, if desired.