Sweet potatoes are great fries, but you are not able to make them as crispy as regular french fries. Sweet potato fries are very high in sugar and this keeps them from becoming crisp no matter what you do to them.
Just like regular fries these fries also require blanching in oil before the final frying.

Sweet Potato Fries

I managed to make them very crispy by following this recipe. You will need a deep fryer for this recipe. I don’t recommend using a deep pan for frying, but that is of course entirely up to you.

Makes 4 servings

Ingredients
2 lbs Sweet potatoes (yams)
Vegetable oil for frying (see fryer for amount)
Salt
Garlicky Mayo

Instructions

• Peel potatoes. If you want to keep the skin on, by all means do. In that case make sure to scrub them clean.
• Cut potatoes in shoe string fries, 1/6 inch or 4 mm. Rinse in cold water several times and leave them covered with water in bowl. Place in fridge for 1-2 hours.
• Take the out of the fridge and dry them completely. Make sure the fries are completely dry before cooking them in the fryer. This is very important to prevent dangerous splatter of oil from the fryer.

Blanching

• Set the fryer on 325F. When hot, submerge the fries and blanch them for 4 minutes. Take them out and drain on baking sheet lined with paper towel. Let cool.

Final frying

• Set the fryer on 375F or highest setting. When hot, submerge the fries in the oil and cook for 5 minutes or until golden brown.
• Take out of oil, drain and place on baking sheet lined with paper towel. Season immediately with salt.

Serve hot with garlicky mayo.

Enjoy.