Failure pattern · United States · 1985
New Coke 1985: winning the taste test, losing the customer
Losing share to Pepsi's sweeter taste, Coca-Cola replaced its formula after about 200,000 taste tests. Public outrage forced it to bring back ‘Coca-Cola Classic’ just 79 days later.
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
by the numbers
- Taste tests
- about 200,000
- Announcement
- 23 April 1985
- Days until Classic returned
- 79
What happened
In the early 1980s Pepsi's ‘Pepsi Challenge’ blind taste tests showed many people preferred Pepsi's sweeter taste, and Coke's share was slipping. Coca-Cola developed a sweeter formula that beat both old Coke and Pepsi in about 200,000 taste tests.
On 23 April 1985 it announced New Coke would replace the original. The backlash was intense: hundreds of thousands of calls and letters, protest groups, and people stockpiling old Coke. Taste tests had measured a single sip, not people's emotional attachment to the brand.
On 11 July 1985 — 79 days later — Coca-Cola brought back the original as ‘Coca-Cola Classic’. Sales of the classic rose, and some believe the episode actually strengthened customers' bond with the brand.
Timeline
- 1985
New Coke launched (April); Coca-Cola Classic returns (July).
what went wrong
- Research measured taste but not emotional attachment.
- Removed the original instead of adding a new option.
- Fast reversal limited lasting damage.
the lesson
Customers don't just buy a product's features — they buy what it means to them. Research that misses that can mislead.
Apply it to your business
- 1Test changes to iconic products very cautiously.
- 2Add options before removing beloved ones.
- 3Admit mistakes and reverse quickly.
Laws at work in this story
Figures are rounded and drawn from public reports, company filings and widely cited coverage at the time. Check the company's latest filings before relying on any number.