Preheat your oven to 400°F and line a baking sheet with parchment paper.
Wash and scrub the potatoes well. Leave the skins on for extra texture and nutrients.
Slice the potatoes very thin using a mandoline or a sharp knife. The thinner the slices, the crispier the chips.
Pat the slices dry with a clean kitchen towel to remove excess moisture.
In a bowl, toss the slices with olive oil, salt, pepper, and any optional seasonings you love.
Spread the slices in a single layer on the prepared baking sheet. Don’t crowd them or they’ll steam instead of crisp.
Bake for 20 to 25 minutes, flipping halfway through. Watch them closely at the end so they don’t burn.
Remove from the oven when golden brown and let them cool slightly before serving (if you can wait that long).