Slice the Potatoes: Using a sharp knife or mandoline, slice your Yukon Gold potatoes into thin, even slices, about ⅛-inch thick, to ensure they cook uniformly.
Pat Dry: Pat the sliced potatoes dry with a clean kitchen towel or paper towels to remove excess moisture and help them crisp up better in the air fryer.
Toss with Seasoning: In a large bowl, combine the olive oil, salt, black pepper, and garlic powder, then add the potato slices and toss until every slice is evenly coated.
Preheat the Air Fryer: Set your air fryer to 375°F and let it preheat for 3-5 minutes while you finish preparing the potatoes.
Arrange in Basket: Place the seasoned potato slices in a single layer in the air fryer basket, making sure they are not overlapping as much as possible for maximum crispness.
Cook First Batch: Air fry for 12-15 minutes, shaking the basket halfway through to ensure even cooking and browning on both sides.
Check for Crispness: At 12 minutes, check the potatoes for your desired level of crispness; add 2-3 more minutes if they need extra time to reach golden brown perfection.
Cook Remaining Batches: If your air fryer basket is smaller, you may need to cook the potatoes in batches; keep finished batches warm on a plate while you cook the rest.