Many years ago I did a deep dive to find the perfect French Fry recipe. All the recipes called for triple cooked French fries - boil once, then low temperature fry at 120C, allow to cool, then fry again at 180C. Some of the recipes even call for freezing to dehydrate the fry a little after the second step.
I found an article describing how McDonald's makes the perfect French fry. Say what you like, but
I like them. There is a lot to admire about McDonald's - to me it is a minor miracle that the fries are so consistent, from country to country, and these fries are made by low paid and low skilled workers. The answer is the food scientists who work in McDonald's really know what they are doing. They have perfected the recipe, the cooking technique (temperature controlled fryers with automatic baskets), packaged the fries in perfect sizes for the fryer, and even invented a salt dispenser that dispenses the correct dose of salt per batch of fries. The attention to detail is all at the factory end where variables can be controlled.
That is when I realized that McDonald's fries actually have the same steps for a perfect French fry that are recommended in all the food blogs - parboil, low temperature fry, freeze. Then refry from frozen at 180C.
Now I can't go to the shops and buy frozen fries from McDonald's, but there are plenty of products like these in Aussie supermarkets:
So I bought a pack and made up an oil mixture with 75% canola and 25% beef tallow (I mixed the oils to get the cost down, beef tallow is expensive!!). Also, McDonald's used to use beef tallow before they changed their oil due to health concerns. Beef tallow simply tastes better. I fried these fries from frozen at 180C until golden. Result: the best shoestring fries I have ever tasted, even better than McDonald's thanks to my use of beef tallow.