"Miracle" was written by Beyond51, Frida Amundsen, Ovi and Philip Halloun, while production was solely handled by Beyond51. Ovi met with Halloun at a songwriting camp in Sweden in June 2013, where they penned the song's lyrics in a few hours. "Miracle" was subsequently produced in the fall of the same year. During a press conference, Ovi revealed that the song was intentionally "generic", as he wanted to reach a wider audience with simple and memorable lyrics. "Miracle" has been described as a love-themed dance and eurodance recording, featuring techno beats and a piano in its instrumentation. During the song's bridge, Seling holds a note for 18 seconds. Reviewers compared "Miracle" to the music of Avicii, Swedish House Mafia, Benny Benassi and Cascada.
