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What is Freeze-Dried Ice Cream?

Niki Acker
By
Updated May 16, 2024
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Freeze-dried ice cream, popularly marketed as "Astronaut Ice Cream," is a type of snack first developed by the National Aeronautics and Space Administration (NASA) for astronauts to eat in space. Freeze-dried ice cream is completely dehydrated, so it is nearly light as air and dry to the touch, cannot melt, and does not require refrigeration or preparation. It's easy to eat by hand and won't make a mess. Freeze-dried ice cream was first used by astronauts on the Apollo missions of the 1960s and 70s, and it is still used on space flights today. It is also available in many science museum gift stores and similar novelty shops.

Freeze-dried ice cream is usually Neapolitan, with a stripe each of chocolate, vanilla, and strawberry flavors. It is made out of real ice cream, so it tastes like ice cream and contains all the original nutrients, but has a dry, crunchy texture. Freeze-dried ice cream sandwiches can also be found, along with other snacks like pizza and peaches. Freeze-dried ice cream and other "Astronaut" food is ideal for hiking trips or other occasions in which one wants to bring food but travel light.

Freeze-dried ice cream is made through a process called lyophilization. The ice cream is frozen to -40° Fahrenheit (-40° Celsius) and placed in a vacuum chamber. Air is removed from the vacuum chamber, and then the chamber is heated, allowing the ice to vaporize, dehydrating the ice cream. Through this process, the intermediary liquid state (water) between solid (ice) and gas (vapor) that would exist in natural conditions is bypassed. This change of state from a solid directly to a gas is known as sublimation in physics.

Freeze-dried ice cream is both a practical snack for outdoor trips and a fun treat for children or anyone interested in science. If you are unable to find any at a store near you, there are many freeze-dried treats available through online merchants.

DelightedCooking is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Niki Acker
By Niki Acker
"In addition to her role as a DelightedCooking editor, Niki Foster is passionate about educating herself on a wide range of interesting and unusual topics to gather ideas for her own articles. A graduate of UCLA with a double major in Linguistics and Anthropology, Niki's diverse academic background and curiosity make her well-suited to create engaging content for WiseGeekreaders. "
Discussion Comments
By anon327176 — On Mar 26, 2013

I wish I could make freeze-dried ice cream at home. That is something scientists need to work on: a freeze-drying machine for at home use so that we can make the most delicious unfrozen, dried ice cream in the world. It is delicious!

By anon131902 — On Dec 04, 2010

Freeze dried ice cream has only been in space once, on the Apollo flight. Since then, it's been sold as a novelty in science museums and as an MRE for hikers.

Niki Acker
Niki Acker
"In addition to her role as a DelightedCooking editor, Niki Foster is passionate about educating herself on a wide range...
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