The Utility Muffin Research Kitchen (UMRK) is the name of the recording studio that Frank Zappa built and used extensively for many of his musical recordings. The studio was completed on September 1, 1979 at his home in the Hollywood Hills (7885 Woodrow Wilson Drive, Los Angeles, CA 90046) and the recording of several songs that were eventually released on the album You Are What You Is began in July 1980.