Line a baking tray with parchment paper. This will prevent the fries from sticking.
Remove the fries from their packaging and place them on a baking tray in a single layer.
Cook for a approximately 20 minutes until crunchy, turning halfway through cooking time. If they're not cooked enough at this point, leave them in the oven for 5 more minutes, keeping an eye on them to ensure they don't burn.