For decades, Pepsi sold itself as the cheaper option. The Pepsi Challenge changed the argument from price to taste, and it did it with the most persuasive evidence an advertiser has: ordinary people, on camera, choosing your product.
How the challenge worked
The format was simple. A shopper was offered two cups of cola with the labels hidden and asked which one they liked better. Then the brands were revealed. Pepsi launched the challenge in 1975 as a promotion and turned the results into television commercials, showing real people looking surprised when the cola they preferred turned out to be Pepsi.
The test itself was not new. What was new was using it in public, as advertising, against the market leader by name. Coca-Cola could not easily respond without drawing more attention to the test.
Why it hit Coca-Cola so hard
Coca-Cola had been losing ground for years. After World War II it held 60 percent of the cola market; by 1983 its share had fallen below 24 percent. Much of that went to Pepsi, and the Challenge gave the trend a story that anyone could understand: people like the taste of Pepsi more.
The worst part for Coca-Cola was that its own research agreed. When the company ran blind tests, the sweeter profile kept winning. That finding became the foundation of a secret reformulation project, and in April 1985 Coca-Cola replaced its 99-year-old recipe with a sweeter one. The public revolt against New Coke is one of the most famous failures in marketing, and the Pepsi Challenge was the pressure that started it.
Was the test fair?
Critics have questioned what the Challenge actually proved. In his 2005 book Blink, Malcolm Gladwell described conversations with food-industry researchers who blamed “sip tests” for misleading both companies. A sip is less than a full serving, and in a single sip people tend to prefer the sweeter of two drinks. That preference does not necessarily hold across a whole can, or over several days of drinking at home.
In other words, the Challenge may have measured something real but narrow. For advertising, that did not matter. The claim was simple, visual and endlessly repeatable.
When Business Insider ran its own informal version with 21 employees in 2013, 62 percent of them picked Coke, a reminder that results depend heavily on who is tasting and how.
Why it worked as marketing
- It turned a product claim into a scene. Instead of an announcer saying Pepsi tastes better, viewers watched strangers discover it.
- It dared the leader to respond. Any direct rebuttal from Coca-Cola would have repeated Pepsi’s message.
- It was cheap to scale. A folding table, two cups and a camera crew could run the Challenge in any town.
- It played to Pepsi’s position. As the challenger, Pepsi had little to lose by picking a fight; the leader had everything to lose.
Legacy
The Pepsi Challenge became shorthand for any head-to-head blind comparison, and it set the tone for the “cola wars” of the 1980s. Pepsi has returned to it several times, relaunching it on social media in 2015 and announcing another revival in 2025, starting in New Orleans around Super Bowl LIX.
Its most lasting effect, though, was on its rival. By convincing Coca-Cola that taste was the battlefield, the Challenge helped provoke New Coke, a mistake that taught the whole industry that people do not buy a cola on taste alone.