Jon Favreau did his own cooking by training with food truck chef Roy Choi. Choi sent Favreau to a week of intensive French culinary schooling, where Favreau sharpened his knife skills and learned how to make sauces. "I brought him into the kitchen, and he just kind of fit in," Choi recalls. "I threw him a couple tests, like a case of chives, or a case of onions, or peel two cases of avocados. Just to see where his mind and his situation and his abilities were and how interested he was in these things. He just attacked them. He really became a part of it."
Promotional events centering on the fictional Cubano-serving El Jefe proved so popular that Favreau and L.A.-based chef Roy Choi who consulted on the film, have opened a series of pop-up restaurants and announced that they are thinking about making the track permanent.
Towards the end of the film, the El Jefe truck is seen at a nighttime food-truck event, along with many of L.A.'s most popular food trucks. This is an actual event in Venice called "First Fridays." For a brief moment, you can see Chef Roy Choi's Kogi truck, the food truck that started the whole gourmet-food-truck craze.
This is the second time Jon Favreau, Robert Downey Jr and Scarlet Johansson all worked together on a project directed by Jon Favreau. The first was Iron Man 2, then they worked together again albeit without Jon Favreau as a director on Iron Man 3.
When Carl is speaking with the publicist after he gets fired from his job, the publicist suggested that Carl should participate in the reality TV show, "Hell's Kitchen". This was a reference back to when Jon Favreau played the role of Foggy Nelson in the superhero film, Daredevil (2003). The setting of the film was named "Hell's Kitchen".