"Vanilla" is a debut single recorded by South Korean girl group Lightsum.

On April 15, 2021, Cube Entertainment announced that it would be debuting a new girl group, the first since (G)I-dle in 2018.

[5][6] "Vanilla" was written by Jo Yoon-kyung, composed and arranged by Steven Lee, and J. Littlewood alongside Caroline Gustavsson for the composition.

[7] It was described as teen pop and dance-pop song with lyrics about "expressing the thrill of tension when starting something new with the sweetness of the moment you fall in love".

[13] Prior to the release of "Vanilla", Lightsum held an online showcase on the same day to introduce the song and to communicate with their fans.