What's Brewin', Bruin? is a 1948 Looney Tunes cartoon directed by Chuck Jones, with story by Michael Maltese and Tedd Pierce, and starring The Three Bears. It is one of four known pre-1948 Looney Tunes to keep their original closing rings. Like all other 1947-1948 Looney Tunes cartoons with Blue Ribbon reissues, original opening credits are cut but the original ending music is preserved.