The Internet movie database (IMDB) quotes Buddy the Elf as saying the four main food groups are "candy, candy canes, candy corns and syrup." Buddy the Elf is the main character in the movie "Elf."
"Elf" is a 2003 Christmas comedy film starring Will Ferrell, James Caan, Bob Newhart and Zooey Deschanel, according to IMDB. The film follows Buddy, played by Will Ferrell. Buddy is a human who was raised by Santa's elves, and he travels to find his birth father. Along the way, he finds a family, love and his true identity. The movie was written by David Berenbaum, and directed by Jon Favreau.