Frozen fries should be fried for 6 minutes. KFC, McDonald's standard is to fry 6 minutes appropriate, because after the frozen fries inside the water icing, the structure of the fries will therefore become a half-empty feeling in the middle, will not become damp, in the deep-frying process will not fall off, will not be stuck together and easy to cook, after the deep-frying of which the water content is less will become more crispy and less easy to become soft.