Burnt Weeny Sandwich is an album by Frank Zappa and the Mothers of Invention, released in 1970. It consists of both studio album and live elements. In contrast to Weasels Ripped My Flesh, which is predominately live and song-oriented, most of Burnt Weeny Sandwich focuses on studio recordings and tightly arranged compositions.
The LP included a large triple-folded black and white poster ("The Mothers Of Invention Sincerely Regret To Inform You") which has never been reproduced in any of the CD reissues. Until the 2012 Zappa Family Trust reissue campaign, CD editions had a severe dropout at the beginning of "The Little House I Used to Live In" that wasn't present on the original LP pressing.
The album's unusual title, Zappa would later say in an interview, comes from an actual snack that he enjoyed eating, consisting of a burnt Hebrew National hot dog sandwiched between two pieces of bread with mustard.
Burnt Weeny Sandwich and Weasels Ripped My Flesh were also reissued together on vinyl as 2 Originals of the Mothers of Invention, with the original covers used as the left and right sides of the inner spread, and the front cover depicting a pistol shooting toothpaste onto a toothbrush.