Jerry Seinfeld co-wrote the movie, directed it, produced it and stars as Bob Cabana, a fictional Kellogg's employee loosely based on William Post, who led the team that developed the Pop-Tart.

“It was COBID,” says Jerry Seinfeld. “I had nothing to do.” And that’s why you’re getting a movie about Pop-Tarts, comedy fans. Even Seinfeld, a guy who’s built a career kvetching ...