Since their debut in 1930, Twinkies have become a staple of American snacking, appearing in films, television shows, and grocery aisles across the country.
Despite the persistent urban legend that Twinkies never spoil, the product’s official shelf life is 45 days from the date of manufacture. This figure, set by the company, is 19 days longer than the original expiration period that was in place before the 2012 recipe revision.
The 2012 change came just before Hostess was sold to Apollo Global Management and Metropoulos & Co. in 2013. To extend the cakes’ longevity, the brand began freezing certain batches so that they would stay fresh longer after distribution.
Jay Leno’s 1990s joke that Twinkies could survive a nuclear apocalypse helped cement the myth, but the Associated Press reports that the cakes remain safe for 45 days, a far cry from the tardigrade comparison.
In the 1970s, chemistry teacher Roger Bennatti and his students at George Stevens Academy in Blue Hill, Maine, tested a Twinkie’s resilience over time. In a 2019 interview with The Straits Times, Bennatti noted that an older Twinkie had become grayer, flakier, and more brittle, yet it showed no mold and kept its shape.
Fast forward to 2020, science enthusiast Colin Purrington recalled buying Twinkies during Hostess’s bankruptcy in 2012 and later discovering a box in his basement. After biting into one, he described the flavor as “old sock.” The remaining Twinkies displayed dark blemishes, shriveled wrappers, and dry cream.
These anecdotes illustrate that while Twinkies can last longer than many packaged goods, they do eventually deteriorate. If you’re curious about food preservation, consider studying a box of Twinkies you already own—just remember that the crumbs are probably not ISS‑approved.
