Art Carney flubs his line, and Jackie Gleason has to correct it for him during the dinner table scene where they're naming the new food. (Quotes not verbatim.)
Ralph: "How about Kranmar's Delicious Mystery Appetizer?"
Ed: "Yeah, Kranmar's Mystery Delicious-" (Pauses as if he knows he's messed it up but can't quite remember the real thing.)
Ralph: "No, Delicious Mystery."
Ed: "Oh, yeah, yeah. Kranmar's Delicious Mystery Appetizer!"