The Oh Henry! bar was introduced in 1920 by the William Williamson Candy Company in Chicago. The most widely accepted story behind the name involves a young man named Henry who frequented Williamson’s candy shop. Henry was known for flirting with the female candy makers, who would constantly yell, "Oh Henry!" when they needed him to do favors or heavy lifting around the shop. Williamson liked the ring of it so much that he used the phrase to name his newest peanut-loaded creation.

By 1923, the bar had become a national sensation in the United States, and its popularity quickly spread across North America, eventually leading to separate manufacturing and recipe variations in Canada under Hershey.

For baseball fans in Quebec, the candy bar takes on a completely different, rowdy meaning thanks to the Montreal Expos and outfielder Henry Rodriguez. When Rodriguez joined the Expos in 1995 and started blasting home runs, fans at the Olympic Stadium looked for a unique way to celebrate their new hero.

Taking a cue from the candy bar's name, fans began throwing actual Oh Henry! bars onto the field whenever Rodriguez hit a home run. The tradition grew so massive that by the 1996 season, the field would be showered with thousands of chocolate bars after his big hits. Ground crews had to scramble with trash cans to clear the field, and opposing players occasionally took cover, but the marketing opportunity was pure gold—with Hershey even sponsoring special promotional nights at the Big O to fuel the sweet, chaotic celebration.

Today, the Oh Henry! bar remains a staple of the confectionery aisle, loved for its perfect balance of salty, crunchy peanuts and sweet, chewy caramel. Whether you love it for its classic 1920s history or its nostalgic 1990s baseball connection, there is no denying that this bar has left a permanent, delicious mark on pop culture.