Popular pantry staple could get you stopped at airport security under little-known TSA rule

Travelers may want to take a second look at what they're packing for their next flight after the Transportation Security Administration (TSA) reminded passengers that one common food item is subject to its liquids rule.

"Peanut butter is a liquid... we said what we said... this time with receipts," the agency wrote.

The TSA included a screenshot of a Google AI Overview explaining why peanut butter can be classified a liquid.

Larger quantities can be packed in checked luggage.

"You can't bring peanut butter, [as] the TSA considers that to be a liquid because it conforms to the shape of its container rather than retaining its shape on its own," Leff said.

That doesn't mean travelers have to stop bringing food through security altogether.

"There are more things you can bring through security than you might even realize," Leff said.

"Wherever you go that's not the airport is going to have better food at the same price," Leff said.

Fox News Digital reached out to the TSA for comment.

"I would invite TSA to drink a pint of peanut butter, then," one Reddit user joked.

"So make your sandwich first," another commenter said, offering a simple workaround for travelers hoping to bring the spread along.

In July, the TSA suggested travelers could bring hammocks to airports during long layovers, writing on social media, "Nobody said you couldn't bring a hammock to the airport."

The suggestion divided travelers online. 

Some said hammocks are disruptive in crowded terminals, while others embraced the idea as a way to get comfortable during long waits.