Ian Underwood's contributions are significant on this album. The album, like its counterpart "Weasels Ripped My Flesh", comprises tracks from the Mothers vault that were not previously released. Whereas "Weasels" mostly showcases the Mothers in a live setting, much of "Burnt Weeny Sandwich" features studio work and structured Zappa compositions, like the centerpiece of the album, "The Little House I Used to Live In", which consists of several movements and employs compound meters such as 11/8 with overlaid melodies in 6/8 and 4/4.