Step 1

Cut each potato lengthwise into 3/8-inch-thick slices. Slice sections into sticks also about 3/8 inch-wide.

Step 2

Cover potatoes with water and let soak for 5 minutes to release excess starches. Drain and cover with boiling water by a few inches (or place in a bowl of boiling water). Let sit for 10 minutes.

Step 3

Drain potatoes and transfer onto some paper towels. Blot off the excess water and let cool completely, at least 10 minutes. Transfer into a mixing bowl; drizzle with oil, season with cayenne, and toss to coat.

Step 4

Preheat the air fryer to 375 degrees F (190 degrees C). Stack potatoes in a double layer in the fryer basket. Cook for 15 minutes. Slide basket out and toss fries; continue frying until golden brown, about 10 minutes more. Toss fries with salt in a mixing bowl. Serve immediately.