"What Love Is Made Of" is a song recorded by British recording artist Katy B. Written by Katy alongside Goldon Warren, who also produced it under the name Geeneus, the track was released as a standalone single via digital retailers on 8 July 2013 by Rinse and Columbia Records. It was composed after Katy had been listening to dance genres. The theme conveyed in the lyrics is love while musically, the song has been described as a "trance-y" and "rave-y" dance song with its production containing synthesizers and piano. Katy later decided to not include it in Little Red (2014).

Upon its release, "What Love Is Made Of" received generally favorable reviews from contemporary music journalists, who favored the composition and Katy's distinctive vocal performance. It peaked at number 21 on the UK Singles Chart, and entered three other charts, reaching the top 40. To promote the song, Katy performed it live at the BBC Radio 1Xtra Live special and at her headline set during the Wireless Festival. Emil Nava also filmed and directed a music video for the song which was deemed similar to film series The Fast and the Furious.

In April 2011, Katy released her debut album, entitled On a Mission, by Rinse and Columbia Records. Exploring dubstep-based musical genres, it garnered critical praise, including being nominated for the Mercury Prize. In the UK, it was a commercial success, peaking at number 2 in the UK. Following that release, was the extended play (EP) Danger, which was available online in December 2012. During an interview with Billboard held in March 2013, Katy revealed that her sophomore studio album was nearly done. Katy revealed to MTV UK website District MTV that she felt inspired to record "What Love Is Made Of" by hearing dance music. She then got a bassline which made her "want to dance", and included it in the track. She also told the website that she wrote the song about the "feeling of love, what one person can give to you that someone else can't".

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