Step 1

Place potatoes in a bowl and cover with cold water. Let soak for at least 30 minutes. Drain and dry the potatoes.

Step 2

Mix the cornstarch and ranch seasoning together. In a large bowl, drizzle the potatoes with enough olive oil to coat the potatoes and sprinkle with seasoning mixture. Toss to coat.

Step 3

Heat the air fryer to 375°F. Add the french fries to the basket of the air fryer and cook for 25 to 30 minutes, pausing to toss the fries every 5 minutes or so.

Step 4

In the last five minutes, turn the temperature up to 400°F and cook until browned and crisp.