Recipe video above. If you want French fries that stay crispy for a good 15 minutes - even after they've gone cold(!) - this is the recipe for you. Adapted from a ground-breaking method documented in The Food Lab by the legendary Kenji López-Alt, read in post for why this recipe works and makes the best French fries!I really hope you try this one day so you can experience the awesomeness of homemade French fries. McDonald's is incomparable!