New Coke debuted 30 years ago. Here’s why it was a sugary fiasco.

Coke fans called it “Black Tuesday.”

On April 23, 1985 — 30 years ago today — the carbonated disaster called New Coke made its debut. Coca-Cola’s idea was to make Coke appeal to a younger generation by replacing its signature soda with a sweeter version. It quickly became a national disgrace.

The experiment only lasted a few months before Coke reversed course — on July 10, 1985, it announced it would bring back “Coca-Cola Classic,” selling it alongside New Coke. But even though New Coke has gone down as one of the most infamous mistakes in marketing history, most people don’t know the real reasons it failed.

New Coke didn’t only fail because it tasted too sweet — it failed because the marketing campaigns, business structures, and company culture at Coke doomed it from the beginning.

The problems with New Coke did have a lot to do with taste — because Coca-Cola didn’t know how to measure what the ideal taste was.

As Coca-Cola itself recalls, desperate times called for desperate measures. The company was in the midst of the “cola wars” against Pepsi, and for 15 years it had been losing market share to the slightly sweeter soda. That caused a radical response: New Coke.

But Coca-Cola didn’t rashly change its signature formula. The company claims to have performed more than 200,000 taste tests before introducing New Coke. In those tests, customers preferred the sweeter formula to the classic one, and that gave CEO Roberto Goizueta the ammunition to make the switch. The problem was that a taste test didn’t measure how people drank Coke in real life.

Malcolm Gladwell proposed a compelling explanation in Blink: the taste tests conducted by Coke and by Pepsi didn’t represent how consumers actually drank soda. The working theory is that consumers enjoyed the sweeter taste of Pepsi and New Coke in small doses, but in larger quantities (like a two-liter bottle or full can), the extra sweetness was more polarizing.

The cola wars had, in theory, begun as soon as Coca-Cola found a formidable competitor. It had that in Pepsi, starting with the Pepsi Challenge ad campaign in 1975, which asked consumers to perform a taste test between Pepsi and Coke. It only intensified as the upstart brand gained market share. When New Coke launched, it showed that Coke was sacrificing a key front in the war — and the media leapt on it.

According to Thomas Oliver’s The Real Coke, The Real Story, the marketing salvos fired by Pepsi were paired with a sophisticated PR strategy. In addition to ads trumpeting Pepsi’s victorious battle in the cola wars, the soda maker primed reporters to barrage Coke with challenging questions. Before the press conference announcing New Coke, Pepsi called more than 200 reporters with suggested lines of attack.

Though there was genuine consumer distaste for the New Coke formula — Coke’s consumer hotline reportedly lit up with thousands of complaints — the media aided the backlash by leaping on stories about frustrated Coke consumers.

Gay Mullins, founder of an organization called Old Cola Drinkers of America, reportedly spent $30,000 to help convince Coke to bring back the original cola, and he earned much more than that in media attention. When he called Coke un-American and complained, “They have taken away my freedom of choice,” it made for a better quote than one that might be offered by a satisfied New Coke consumer.

In 1985, Pepsi symbolized youth and Baby Boomers. Coke represented tradition, in part because of its marketing efforts over the previous 50 years. As noted in The Real Coke, The Real Story, Coca-Cola symbolized the real America.

To pick one example featured in The Real Coke, The Real Story, Rocky Mountain News columnist John Coit called Pepsi “sugar-plum fairy gag juice” while Coke was (the apparently preferable) “daddy juice.” When Coit received a case of New Coke, he blasted it as “a lousy imitation of Pepsi.”

Some commentators even believed that the Coca-Cola company, the venerable Atlanta institution, had betrayed the South by copying Pepsi. Though Pepsi was founded in North Carolina, by the 1980s it was headquartered in Purchase, New York. The Real Coke, The Real Story notes that Southern bottlers and consumers more vociferously objected to the New Coke taste.

In the mid-‘80s, Bill Cosby was at a peak in popular culture, and he was both a Coke pitchman and an investor. But Coke didn’t know what to do with him.

Before New Coke, Cosby said how awful Pepsi and sweet drinks were:

After New Coke, his taste suddenly changed:

It reflected the general confusion in Coke marketing — the company had spent the early ‘80s mocking Pepsi’s sweeter taste, priming the public to react negatively when Coke changed its recipe.

New Coke was a massive risk, so why didn’t it create a separate “New Coke” from the beginning to run alongside the classic version? It didn’t have a choice — Coke needed to retain market share for a single drink.

Fountain sales made up a formidable two-thirds of Coke’s market, and the presence of Coke in McDonald’s and other fountain machines wasn’t a foregone conclusion.

Many of the contracts depended on Coke being the top-ranked cola. And if market share for Coca-Cola fell, the company might lose even more ground to Pepsi. If Coke had planned to run New Coke and original Coke side by side, it would have risked splitting its market share and alienating valuable fountain clients.

Later, when Coke reversed course and briefly produced New Coke and Coke at the same time, that’s exactly what happened — the company lost market share and prestige to Pepsi by splitting its own market.

When Coke changed course, it couldn’t do so unilaterally. A large network of independent bottlers had influence over the company, and they helped drag New Coke down. Without the bottlers’ support, Coke would lose a key channel for its product, since these franchisees bottled and distributed Coke around the country and world. Though consumer response might have doomed New Coke even without the objection of bottlers, the network of diverse business interests made it almost impossible for Coke to drastically change its formula without a wide consensus.

Constance Hays’s The Real Thing: Truth and Power at the Coca-Cola Company describes the problem: bottlers at Coke were partners with Coke in Atlanta, and their business was dependent on “Big Coke” (these bottlers were more influential and independent in the ‘80s than they are today). As a result, Coke had to keep them happy.

When New Coke started to get negative feedback, bottlers were very angry (some had only learned about the change on the radio). Bottlers received angry customer complaints directly, and a couple of months after New Coke debuted, a group of bottlers traveled to Atlanta to register their complaints. The Coca-Cola Bottlers Association also jumped on board and told Coke to bring back the classic formula.

CEO Goizueta couldn’t hold on to such a drastic change in the face of bottlers’ protests. That led to the July 10, 1985, announcement that Coca-Cola Classic would return.

Some conspiracy theorists believe New Coke was introduced simply to revive the classic formula’s fortunes. But it’s more likely that Coke simply didn’t realize all the ways it could fail, and what a revision to the classic formula would sacrifice.

As one executive said in The Real Thing, “We did not know what we were selling. We are not selling a soft drink. We are selling a little tiny piece of people’s lives.” It turned out that piece was a lot harder to take away than Coke originally thought, for more reasons than it ever could have predicted.