Preheat oven to 400°F (200°C).
Use a mandolin to cut potatoes into ⅛-inch thick slices. (It can help to lay your slices out on paper towels and pat dry before seasoning and baking to remove excess moisture. This will allow them to cook faster and make them crispier!)
Arrange slices on a wire baking rack (if you have one) on top of a parchment-lined baking sheet.
Spray slices with cooking spray and season to taste. If desired, flip slices to spray and season on the other side.
Bake 12-20 minutes*, flipping your slices halfway if not using a baking rack.*Cook time may vary! It will depend on your oven, the thickness of your slices, and the moisture/starchiness of your potatoes. When ready, potato slices will be curling around the edges and starting to brown. Don’t be afraid of letting them brown a bit if you want truly crispy baked potato chips!
Sprinkle with salt when out of the oven if desired.
Allow to cool, serve, and enjoy!