standard way to make crispy sweet potato fries?
Freezing fries opens up their texture and makes them more fluffy. This is helpful for regular fries or sweet potato fries.

Sweet potatoes have too much sugar and not enough starch to crisp up on their own. The only crispy sweet potato fries I have ever made- or eaten- were coated in starch to provide the crispiness.

While I haven't tried this exact recipe- I haven't used club soda for example- it has all the right steps and looks like it would work.