Wix Restaurants Request: Selecting the Same Modifier More than Once
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Currently, it's not possible for customers to select the same modifier more than once for an item. For example, if you offer a customizable box of cookies, customers can’t choose the same flavor multiple times.
Workaround:
Create multiple versions of the same modifier group with identical modifiers (e.g. 'First Cookie Choice', 'Second Cookie Choice') to let customers select the same flavor more than once or mix and match. Learn more about adding modifiers.

We are always working to update and improve our products, and your feedback is greatly appreciated.