01 - Using a mandoline or sharp knife, slice potatoes into very thin rounds about 1⁄16 inch thick for uniform crisping.
02 - Rinse potato slices in cold water until water runs clear to eliminate surface starch. Drain and pat thoroughly dry with clean kitchen towels or paper towels—moisture prevents crispiness.
03 - Pour oil into a deep, heavy-bottomed pan or deep fryer. Heat to 340°F, monitoring with a thermometer to maintain consistent frying temperature.
04 - Carefully add potato slices in small batches to prevent overcrowding. Fry for 2–3 minutes, turning occasionally with tongs, until golden brown and crisp.
05 - Remove chips using a slotted spoon and transfer to a paper towel-lined tray. Immediately sprinkle with sea salt and pepper if desired while hot for optimal adherence.
06 - Allow chips to cool completely on the rack to achieve maximum crunch. Store in an airtight container at room temperature if not serving immediately.