The EP contains one Soundgarden original, two covers, and a remix. Guitarist Kim Thayil said of the title track: "That's an Ohio Players song off of Honey—I've had that album since I was in high school. We thought we could take the song and make it AC/DC or something. We'd take the power chords, turn up the volume and make it heavy. "Fopp" is a good song that needed to be given its due as a 'kick-ass rock song!'" The EP also contains a cover of the Green River song "Swallow My Pride" from the 1985 EP, Come on Down.
Fopp was released on vinyl only, packaged in black die-cut sleeves and limited to 3,000 copies. Frontman Chris Cornell said, "The second record did pretty well but it wasn't like a sweep, some people didn't like it."