The Willy Wonka-inspired elevator artwork took artists and food technicians four weeks to produce.
The installation is being trialled at Engine's offices at London's Great Portland Street.
The lift was created as a way of relieving stress for London office employees.
McVitie's Jaffa Cakes senior brand manager Philippa Tilley said of the project: "We are all about bringing a bit more fun to life and this was the perfect way to get a little joy straight to stressed out office workers.
"We hope the lifts raise a smile, give people a taste for Jaffa Cakes and encourages them to go and buy a pack for the office."
McVitie's added that once a Jaffa Cake is licked in the lift, it is taken off the wall.
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