The Filet-O-Fish is basically one of those McDonald’s menu items that people either love or completely avoid. But here’s the thing – the story behind why it even exists is pretty much more interesting than the sandwich itself. And honestly, it’s a story that involves a struggling franchise owner, a ridiculous pineapple burger, and a bet that changed everything.
A franchise owner was losing money every Friday
Lou Groen opened the first McDonald’s in the Cincinnati area back in 1959. Business seemed okay at first, but there was this huge problem he didn’t see coming. The neighborhood where he’d set up shop was 87 percent Catholic, and back then, Catholics weren’t eating meat on Fridays. At all. Which meant his burger joint was basically empty every Friday – the day that should’ve been bringing in the most cash. I mean, imagine opening a burger place and watching sales drop to around $75 on what’s supposed to be your busiest day. That’s pretty much a disaster.
Groen was desperate. His crew consisted of himself, his wife, and one other guy named George. He was sweeping floors and doing repairs just to keep the place running. But Friday sales kept tanking, and he knew something had to change or he’d lose everything.
He noticed what the competition was doing right
So Groen started paying attention to what worked at other restaurants in Cincinnati. Frisch’s Big Boy was totally crushing it on Fridays with their fish sandwich. And that’s when it clicked for him – if Catholics can’t eat meat, they can eat fish. Maybe that’s what his McDonald’s needed. A fish option.
He went to work developing recipes, testing different batters, making his own tartar sauce. Groen was pretty hands-on about the whole thing. After trying these different versions, he settled on a fried halibut sandwich that he thought was perfect. Then he took his idea to Ray Kroc at McDonald’s headquarters.
Ray Kroc hated the fish sandwich idea
Kroc basically told Groen he was nuts. “You’re always coming up here with a bunch of crap!” he said. “I don’t want my stores stunk up with the smell of fish.” Not exactly encouraging feedback. But Kroc had his own idea for a meatless option that he thought was way better. He’d been working on something called the “Hula Burger” – which was literally just a slice of pineapple and a slice of cheese on a bun. That’s it. Does anyone actually think that sounds good?
So instead of just rejecting Groen’s fish idea outright, Kroc proposed a bet. They’d put both sandwiches on the menu for one Friday and see which one customers actually wanted. Winner takes all. The loser’s sandwich gets dropped forever.
The showdown happened on Good Friday 1962
April 20, 1962 was the day. The Hula Burger versus the Filet-O-Fish. And honestly, it wasn’t even close. Groen’s fish sandwich sold 350 units that day. Kroc never revealed exactly how many Hula Burgers sold, but some sources say it was around six. Total disaster for the pineapple-cheese combo. The fish sandwich won hands down, and Groen’s franchise was saved.
The recipe had to change for cost reasons
But here’s where things get interesting. Groen wanted to use halibut, which he felt made a superior sandwich. The problem was each halibut sandwich cost 30 cents to make, and McDonald’s needed the price down to 25 cents. You can’t sell something for less than it costs to make, obviously. So they had to switch things up. Groen had to fall back on Atlantic cod instead, which was way cheaper. And they added a slice of cheese for flavor since the cod wasn’t quite as good as the halibut.
“My halibut sandwich far outshines that one,” Groen said years later. He was still proud of his original version, even though it never made it to the national menu. I mean, you can’t blame the guy for thinking his first recipe was better. But the modified version worked well enough to save his business.
Why it’s still on the menu today
The Filet-O-Fish became a permanent menu item by 1965. And it’s been there ever since, which is pretty surprising for a fish sandwich at a burger chain. But there’s a solid reason it hasn’t gone anywhere – it’s still serving that same purpose it did back in 1962. Catholics still observe Lent, and during those 40 days in spring, about a quarter of all Filet-O-Fish sales happen. That’s a huge chunk of annual sales concentrated in just over a month.
McDonald’s sells over 300 million of these sandwiches every year. Which means even outside of Lent, people are buying them regularly. The sandwich has become sort of a nostalgic thing for a lot of customers who grew up eating them. After trying these as a kid, plenty of people keep ordering them as adults even though they don’t necessarily love McDonald’s burgers.
The recipe uses different fish now
The Filet-O-Fish you get today isn’t made with Atlantic cod anymore. At some point, McDonald’s switched to using sustainable Alaskan Pollock. But the basic concept hasn’t changed – it’s still a breaded, fried fish patty with tartar sauce and that half slice of American cheese on a steamed bun. And yeah, it’s only a half slice of cheese, which some people find weird. But that’s how it’s been since the beginning, pretty much.
The sandwich also comes in a box now instead of being wrapped in paper, which honestly makes a difference. The box keeps the bun from getting squished and all the sauce from squeezing out the sides. Though the fish patty itself can still get sort of soggy if you wait too long to eat it.
People have strong opinions about this sandwich
If you mention the Filet-O-Fish to anyone, you’re basically going to get one of two reactions. Either they love it or they think it’s totally gross. There doesn’t seem to be much middle ground. Some people can’t understand why anyone would order fish from McDonald’s when it’s known for burgers and fries. The combination of fried fish and processed cheese on a soft bun just doesn’t work for them. And that’s fair.
But for people who do like it, there’s something about that specific combination that’s hard to find anywhere else. It’s not trying to be a fancy fish sandwich – it’s just what it is. The tartar sauce is tangy and full of pickle bits, the cheese adds a creamy element, and the fish is mild enough that it doesn’t overpower everything. At least that’s how fans of the sandwich see it. Is it the best fish sandwich you can get? Probably not. But it serves its purpose.
Lou Groen never made money from his invention
Here’s something kind of crazy – Groen didn’t receive any royalties or special payment for creating one of McDonald’s most enduring menu items. He just saved his own franchise from going under. But that turned out to be enough. By the time he sold his McDonald’s restaurants in 1986, he owned 43 locations. Not bad for a guy who was kicked out of his home at 17 and spent decades working odd jobs before finally getting his own business going. The fish sandwich basically saved his career and let him build something successful.
So yeah, the Filet-O-Fish exists because one franchise owner was desperate enough to convince Ray Kroc that fish could work at a burger chain. And because a pineapple-cheese sandwich was a terrible idea. Sometimes the weirdest origin stories turn out to be true.
