Most people think McDonald’s keeps the Filet-O-Fish around just to have a fish option, but the real story is way more interesting. This sandwich literally saved a franchise from going out of business and beat out one of the weirdest menu items ever tested. The origins involve a desperate restaurant owner, a crazy pineapple sandwich, and a religious community that changed fast food forever.
A struggling franchise almost went bankrupt because of Friday sales
Back in 1961, Lou Groen was running the first McDonald’s franchise in Cincinnati, Ohio, and things were going terribly. While most restaurants made their biggest profits on weekends, Groen’s location was losing money every single Friday. His restaurant was located in an area that was 87 percent Catholic, and at that time, most Catholics didn’t eat meat on Fridays. Friday sales dropped to just $75 a day while his crew consisted of himself, his wife, and one other employee named George.
Groen was doing everything himself – repairs, sweeping floors, and running the register. He watched his competition, particularly Frisch’s Big Boy, and noticed they were crushing it with fish sandwiches on Fridays. The man who had been kicked out of his home at 17 and worked odd jobs for decades wasn’t about to give up on his dream. He started experimenting with fish recipes, developing special batter, and creating tartar sauce for what would become the Filet-O-Fish.
Ray Kroc hated the fish idea and had his own weird solution
When Groen brought his fish sandwich idea to McDonald’s founder Ray Kroc, the response wasn’t exactly encouraging. Kroc told him straight up: “You’re always coming up here with a bunch of crap! I don’t want my stores stunk up with the smell of fish.” Kroc had zero interest in adding fish to the menu and thought Groen was wasting his time with the whole concept.
But Kroc had his own brilliant idea for a meatless option – the “Hula Burger.” This masterpiece consisted of a slice of pineapple and a slice of cheese on a bun. That’s it. No meat, no fish, just pineapple and cheese. Kroc was so confident in his creation that he decided to make it a competition. Both sandwiches would be tested on the same day, and whichever sold more would earn a permanent spot on the menu.
The great sandwich showdown happened on Good Friday, 1962
April 20, 1962, became the day that would determine the fate of both sandwiches. Good Friday was the perfect test date since it represented exactly the kind of day Groen was trying to save. The Filet-O-Fish went head-to-head against the Hula Burger in selected McDonald’s locations. Customers had to choose between fried fish with tartar sauce or pineapple with cheese.
The results weren’t even close. Groen sold 350 fish sandwiches that day and won the bet hands down. When asked about the Hula Burger’s performance, Kroc never revealed the exact numbers, but some sources suggest only six were sold. The pineapple and cheese combination was apparently as unappealing as it sounds. The Hula Burger became one of McDonald’s most embarrassing menu flops, while the Filet-O-Fish earned its place in fast food history.
The original recipe was too expensive, so they changed the fish
Groen’s winning sandwich wasn’t quite the same as what people eat today. His original creation used halibut and cost 30 cents per sandwich to make. McDonald’s wanted to sell it for 25 cents, which meant they were losing money on every single sandwich. This created a problem that needed immediate solving if the fish sandwich was going to work nationwide.
The solution involved switching from expensive halibut to cheaper Atlantic cod and adding a slice of cheese for extra taste. Groen later admitted that his original halibut version was much better than the modified recipe, but customers weren’t complaining about the changes. The new version still solved the Friday problem and kept costs reasonable. Today’s Filet-O-Fish uses sustainable Alaskan Pollock, showing how the recipe has continued to evolve over the decades.
The sandwich saved Groen’s business and made him rich
The Filet-O-Fish completely turned around Groen’s struggling franchise. Friday sales improved dramatically, and his restaurant went from barely surviving to thriving. By 1965, the fish sandwich had become a permanent menu item at McDonald’s locations nationwide. The desperate franchise owner who was sweeping his own floors had created something that would be served billions of times.
While Groen didn’t receive any royalties for inventing the Filet-O-Fish, his success with the sandwich helped him expand his McDonald’s empire. When he sold his franchise business in 1986, he owned 43 different McDonald’s locations. The fish sandwich that started as a solution to a local problem became the foundation of a restaurant empire. McDonald’s reports that more than 300 million Filet-O-Fish sandwiches are sold every year worldwide.
The Lenten season still drives a huge portion of sales
The religious connection that started the whole Filet-O-Fish story continues today. About 25 percent of all Filet-O-Fish sales happen during the 40 days of Lent, which usually falls in March and April. This means that decades after its creation, the sandwich is still serving its original purpose of providing a meat-free option for Catholic customers during religious periods.
Even though many Catholics no longer follow the tradition of avoiding meat on Fridays year-round, Lent remains a major sales driver for the fish sandwich. McDonald’s spokeswoman Becca Hary confirmed that spring sales spike significantly during this period. The seasonal pattern shows how deeply the sandwich is connected to its religious origins, even as McDonald’s has expanded its appeal beyond just Catholic customers.
People either love it or absolutely hate it
The Filet-O-Fish creates stronger reactions than most fast food items. Some people grew up eating them regularly and have fond memories associated with the combination of fried fish, processed cheese, and tartar sauce on a soft bun. These fans often cite nostalgia as a major factor in their continued love for the sandwich, remembering times when they’d order it alongside other McDonald’s items.
On the other side, plenty of people find the entire concept disgusting. The combination of fish and cheese strikes some as completely wrong, and the idea of getting seafood from a burger joint seems questionable. Food critics have described it as essentially a “deep-fried flat and wide fish stick” with tartar sauce and cheese on a bun. Despite the mixed reactions, the sandwich has maintained its place on McDonald’s menu for over 60 years, proving that enough people fall into the “love it” category.
The packaging has improved, but the recipe stays similar
One major improvement to the Filet-O-Fish experience has been the packaging. Years ago, the sandwich was just wrapped in paper, which often resulted in a flattened bun and sauce squishing out the sides. The soft bun couldn’t handle being compressed, and customers frequently ended up with a messy, unappealing sandwich by the time they unwrapped it.
Today’s Filet-O-Fish comes in a protective box that keeps the bun fluffy and prevents the tartar sauce from leaking everywhere. This seemingly small change has made a significant difference in the eating experience. The sandwich now arrives looking much more like what customers expect, with the bun maintaining its shape and all the components staying where they belong. Some longtime fans say this packaging improvement has made the sandwich better than it was a decade ago.
It remains one of the few pescatarian options at major chains
While many fast food restaurants have expanded their menus to include more diverse options, fish sandwiches remain relatively rare. The Filet-O-Fish stands out as one of the most widely available pescatarian options at major fast food chains. For people who don’t eat meat but do eat fish, McDonald’s locations across the country offer a consistent option that’s available year-round.
This unique position in the fast food market helps explain why McDonald’s has kept the sandwich around despite its polarizing reputation. Finding another restaurant chain with a similar fish, cheese, and tartar sauce combination isn’t easy. The Filet-O-Fish fills a specific niche that few other fast food items address, giving it a secure place on the menu regardless of how many people find the concept strange. Its survival proves that sometimes serving a specific audience really well matters more than trying to please everyone.
The Filet-O-Fish story shows how one person’s desperate situation can create something that lasts for generations. What started as Lou Groen’s attempt to save his failing franchise became a permanent part of American fast food culture. Next time someone questions why McDonald’s still serves fish sandwiches, remember that this “weird” menu item actually saved a business and beat out a pineapple-and-cheese creation that makes way less sense.
