C is for Cookie ( song ) " C is for Cookie " is Cookie Monster ' s signature song . Versions of the song . The original version of the song featured Cookie Monster standing behind a giant letter C , with a black background that eventually lightened to reveal a monster chorus including Grover , Fenwick , Herry Monster , Oscar the Grouch , and Billy . In the early 1990 ' s , Candice Bergen paid a visit to the Fix - It Shop to have her radio repaired . To test it out , she lip - synced to the song , complete with some visual aids . A brief instrumental from the song also appears as the sketch ' s ending music button . In 1993 , a new operatic version was taped , featuring opera singer Marilyn Horne as Cleopatra in an Egypt ian setting , with a pyramid made entirely out of cookies in the background . At the end of the song once Cleopatra is carried away out of sight , Cookie Monster appears in Egyptian clothing and pulls a cookie off the pyramid , causing it to collapse with a huge crash . This version includes a brief introductory verse , written by Luis Santeiro and Dave Conner . In Season 30 , another new version was filmed , once again sung by Cookie Monster ( by re - using the original soundtrack ) , but this time standing in front of the giant C on a light blue background with fancy light effects . The chorus of monsters included Grover , Herry Monster , Elmo , Zoe , Telly , and Rosita . A " mash - up " of the different performances is included on the DVD , " C is for Cookie Monster " . Similarly , a clip montage in " " features clips from the original , Marilyn Horne ' s version , and the segment with Candice Bergen mixed together . Other appearances . Clips from the original version of this song appeared in " " , " The Muppets Celebrate Jim Henson " , the " Great Performances " documentary " The World of Jim Henson " and " " . A brief clip from the opera version also appeared in " " and the full clip appeared in " " and " The Street We Live On " . A 1992 episode features Lillian singing the song , only changed to name foods beginning with the letter P . Baby Bear has periodically been heard singing a version of the song , " P is for Porridge , " to himself in a number of episodes . Cookie Monster sang a verse of the song in " Elmopalooza " . In a 1998 episode , Big Bird got the song stuck in his head after watching the newer clip of the song , and constantly tried to find ways to get the song out of his head so he could do other things ( such as tell the viewers what the number of the day is ) . In a 2004 episode , Telly received letters from his Letter of the Month club ; whenever he pressed a button on his letter C , it played an audio recording of Cookie Monster saying " C is for cookie " . In a " Play With Me Sesame " insert , Cookie sings the song with Grover as part of his " Move and Groove " segment . Cues from the song have been used as background music in a 2008 episode and a 2009 episode and as a music button at the end of Adam Sandler and Cookie Monster ' s explanation of the word " crunchy " . In a " Plaza Sésamo " insert , Pancho Contreras sings a version of the song , " C Es De Cebolla " , singing in praise of his favorite food , onions . In a season 42 episode of " Sesame Street " , Gordon pulls a cactus from Big Bird ' s nest . He and Big Bird sing a short little song - " C is for Cactus . " In a season 43 episode , while looking for a song for the letter G , Super Grover ( knowing only that he needs a letter song ) suggests " C is for Cookie , " singing a small portion of it . A trio of horses hum the song in . Cookie Monster also sang the song at the " Jim Henson ' s Musical World " concert on April 14 , 2012 . The origin of the song is touched upon in the 2016 special " Once Upon a Sesame Street Christmas " . In a 19th Century version of Sesame Street ( as shown in a bedtime story for Elmo ) , Santa Claus tells Cookie Monster ' s great - grandmonster that he ' s been writing a song , " C is for . . . , " and needs a hook . He and Cookie think for a bit and Cookie remarks , " Well , c is for cookie and that good enough for me . " Santa passes on that idea , however . The tune is briefly quoted in the score as Santa Claus later gobbles down some cookies in Cookie Monster - fashion . Sources . _ _ NOWYSIWYG _ _