Puffed snack food is usually made by adding a small amount of water into the starch raw material, mixing it well, heating it continuously with pressure by an extruder (for example, 30-40 kg / cm, 2140 ℃), extruding the raw material from the nozzle, expanding it rapidly, and then cutting it off appropriately according to the need, and seasoning it. 

The flavoring method of puffed snack is to spray seasoned vegetable oil, or spray vegetable oil and then sprinkle seasoning solution, and then dry it.

There will also be puffed small food first in vegetable oil immersion, and then directly sprinkled with seasoning.