Can I bring mashed potatoes on a plane?

One of the foods you can't bring on the plane is mashed potatoes. They're considered a liquid so unless you're only bringing 3.4 ounces of mashed potatoes, just put them in a checked bag or make them when you get there.



According to TSA guidelines in 2026, mashed potatoes are classified as a "liquid or gel" rather than a solid food because they can be "spread, smeared, or spilled." This means that if you are carrying them in your carry-on luggage, they are subject to the 3.4-ounce (100ml) rule. If your container of mashed potatoes is larger than 3.4 ounces—which is almost always the case for a side dish—it will be confiscated at the security checkpoint. To bring a larger quantity of your favorite home-cooked potatoes, you must pack them in your checked luggage, ensuring they are in a well-sealed, leak-proof container to prevent a "spud-tastrophe" in your suitcase. The only exception to this rule is if the mashed potatoes are completely frozen solid at the time of screening; however, if they have begun to melt or have any liquid at the bottom, they will likely be rejected. For the easiest travel experience, it is better to buy or prepare your potatoes at your destination rather than trying to navigate them through airport security.

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TSA-approved snacks and meals
  • Sliced veggies with a (smaller than 3.4 ounce) container of hummus.
  • Protein bars.
  • Dried fruits and nuts.
  • DIY charcuterie box (with hard, not creamy, cheeses)
  • Muffins and pastries.
  • Beef or mushroom jerky.
  • Popcorn.
  • Whole wheat crackers.


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