Scrub and dry the potatoes. Cut into thick wedges for fries and rounds for chips. Use a crinkle cutter/fry knife if you have one. Spread the potatoes out on a parchment or silpat covered tray. Use a different tray for each shape. If you have a convection oven, use the convection feature. 

Bake at 425 for 30 minutes, until slightly puffed and crispy. 

Optional: Bake at 400 for 30 minutes in your air fryer.