Running a kitchen comes with a lot of customizations; some customers want chicken and some steak and some customers want small portions while others want large portions. 

With Sprwt, you can create and edit portion sizes by going to Admin Dashboard > Kitchen Settings > Portions. You can set the default portion name by editing the ID -1. 

When creating meal recipes and editing portion prices the Upgrade Charge is the added fee applied to the default portion (-1).