Cracker Jack is a U.S. brand of snack consisting of strong molasses-flavored popcorn and peanuts. Cracker Jack is also famous for its connection to baseball lore.
"Take Me Out to the Ball Game", the song written by lyricist Jack Norworth and set to music by Albert Von Tilzer gave Cracker Jack free publicity when it was released in 1908 with the line "buy me some peanuts and Cracker Jack!"