I'm not sure to what extent this is true for all their cafeterias, but the Cupertino based cafeterias are very much in house, with quite a bit of executive attention. Steve Jobs made the revamp of Cafe Macs one of his first priorities on his return, and he personally recruited Francesco Longoni, who I think still runs the cafeterias, from Il Fornaio.

And Apple even patented proprietary takeout pizza boxes, with involvement by their product packaging team: https://patents.google.com/patent/US20120024859