"Green Onions" is an instrumental composition recorded in 1962 by Booker T. & the M.G.'s. One of the most popular soul songs ever, and R&B instrumentals of its era, it utilizes a twelve-bar blues progression and features a rippling Hammond M3 organ line played by frontman Booker T. Jones, who wrote it when he was 17, although the recording was largely improvised in the studio.