1. French fries can be cooked in 6 minutes.

2. The standard of KFC and McDonald's is to fry for 6 minutes, because the moisture in the frozen French fries freezes, and the structure of the French fries will become like a half-empty middle, which will not change. Moisture will not fall apart during the frying process, will not stick together and is easy to cook. The less moisture content will make it crispier and less likely to soften after frying.