The Transportation Security Administration has doubled down on its classification of peanut butter as a liquid, posting on social media to defend the rule after travelers expressed disbelief.
The agency took to X earlier this month to remind passengers that the popular spread falls under liquid restrictions at airport security checkpoints. “Peanut butter is a liquid… We said what we said… This time with receipts,” the TSA wrote on the platform. The post included a screenshot of a Google AI overview explaining why peanut butter in containers exceeding 100ml is barred from carry-on bags.
One traveler learned the rule the hard way and turned to Reddit to vent. “The lady told us that peanut butter is considered a spread, which is to say, a liquid. And since the jars far exceeded the 3.4 OZ limit for liquids, we had to toss our peanut butter,” the passenger wrote. The Redditor did not specify which airport or when the confiscation occurred.
The TSA’s 3.4-ounce liquid limit applies to all liquids, gels and aerosols in carry-on luggage across US airports. The restriction, familiar to frequent flyers, is strictly enforced at security checkpoints nationwide.
Not everyone accepts the agency’s reasoning. Another Reddit user fired back with sarcasm: “I would invite TSA to drink a pint of peanut butter, then.”
The peanut butter debate is the latest in a long line of passenger confusion over what counts as a liquid. The TSA’s own website lists numerous items that travelers might not expect to face restrictions, and the agency acknowledges that its rules can shift. “TSA adjusts processes and procedures to meet the evolving threat and to achieve the highest levels of transportation security. Because of this, you may notice changes in our procedures from time to time,” the agency states in published guidance on its security approach.
That same guidance emphasizes layered protection beyond the checkpoint. “Security measures begin long before you arrive at the airport. TSA works closely with the intelligence and law enforcement communities to share information. Additional security measures are in place from the time you get to the airport until you get to your destination,” the agency notes.
For peanut butter lovers unwilling to part with their stash, options exist. Spreading it on a sandwich before arriving allows passengers to carry the finished food through security and eat it in the terminal. Alternatively, larger jars can travel in checked luggage, where no liquid restrictions apply.
The TSA has not indicated any plans to revise its classification of peanut butter or other spreads.