McDonald's spent $150M on a burger nobody wanted — the McLean Deluxe

In 1991, McDonald's launched the McLean Deluxe — a low-fat hamburger made with 91% lean beef and carrageenan (a seaweed extract that replaced fat). It was part of a broader 'Deluxe' line of sandwiches aimed at adult fast-food consumers who had been drifting away from McDonald's toward healthier options. The burger performed well in taste tests, and the company believed it had cracked the code for a burger that was both healthy and satisfying.

In practice, the McLean Deluxe was a marketing disaster. Customers who wanted a burger went to McDonald's for a burger, not a health product. Those who wanted healthy food did not go to McDonald's at all. The carrageenan gave the patty an unusual texture that consumers noticed even if they could not name it. The entire Deluxe line, including the later Arch Deluxe and other sandwiches, cost McDonald's an estimated $100–150 million and is considered one of the most expensive flops in the company's history.

The McLean Deluxe was pulled from menus in February 1996. The remaining Deluxe sandwiches lasted until August 2000, when the entire line was discontinued. McDonald's retreated from the 'healthy burger' concept for over a decade, not returning to it seriously until the introduction of premium salads and wraps in the 2000s.