Burnt Weeny Sandwich is the seventh album by the American rock band the Mothers of Invention, and the ninth overall by Frank Zappa, released in 1970.

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 (except the Japanese Ryko mini-lp sleeve editions).

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.

[8] The ending section of "Little House" features an organ solo played by Zappa with the band at Whitney Studios in Glendale, California.

[9] The guitar solo portion of the "Theme from Burnt Weeny Sandwich" is an outtake from an unused extended version of "Lonely Little Girl" from the 1967 sessions for the We're Only in It for the Money LP.