Hey there @CheezyChef
At this time Square Restaurants integrates with Square Online in which you would be able to sell anything from your food all the way to physical items like a cook book. Since you mentioned having an existing website then the best advice I could give is linking to a Square Online site from your existing website so you can integrate with Square. Another route you could take is verifying with your website provider or developer if they would be able to integrate Square into your existing site using our APIs.
I hope this information is helpful!
JJ
Community Moderator, Square
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