In an extrusion treatment, the fava beanis continuously forced through a small nozzle by heat and pressure. The end product is called “extrudate”.

In the case of fava bean, for example, the process is used to produce snacks by utilizing the swelling of the starch under pressure drop.

The water evaporates as the dough exits the nozzle, creating a porous structure similar to potato chips.

Here, the dough features have a great influence on the resulting structure.