Hot Butter was an instrumental cover band fronted by the keyboard player Stan Free. The other band members were Dave Mullaney, John Abbott, Bill Jerome, Steve Jerome, and Danny Jordan. The liner notes to the CD reissue do not indicate who played what, aside from Free at the Moog synthesizer. Indeed, the notes say the band was Free and "a bunch of fellow players". Based upon the photograph and the sound of the album, the group had two additional keyboardists, two percussionists, and a guitarist.