Most foods to be deep-fried, with the major exception of potatoes, are first given a protective coating of breading or batter. This coating serves four purposes:
- It helps retain moisture and flavor in the product.
- It protects the fat against the moisture and salt in the food, which would speed the deterioration of the frying fat.
- It protects the food from absorbing too much fat.
- It gives crispness, flavor, and good appearance to the product.