"Brain Stew" and "Jaded" are two songs released as a joint single by American punk rock band Green Day. They appear as the tenth and eleventh tracks and third single from the group's fourth studio album, Insomniac. The song was also included on Godzilla: The Album. The two songs were released as one single, as the songs are transitional - "Brain Stew" segues directly into "Jaded". After 9/11, "Brain Stew" was placed on Clear Channel's list of post-9/11 inappropriate titles.

The song "Brain Stew" is about Armstrong dealing with insomnia. According to Armstrong himself, "Brain Stew" was originally called "Insomniac" on demo (hence the title of the album on which it is featured), and "Brain Stew" is a reference to Armstrong's long-time friend, James Washburn, who is nicknamed Brain Stew.