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Moment of Um

How do people freeze-dry food?

Moment of Um

American Public Media

Kids & Family, Education For Kids

4.41.5K Ratings

🗓️ 24 November 2023

⏱️ 6 minutes

🧾️ Download transcript

Summary

Freeze-dried food seems like something that was invented for space travel, but this technique for preserving food is actually more than a hundred years old! Nowadays you might see freeze-dried mangos or strawberries in many grocery stores. You know, the ones that are dry and crispy and light as a feather? But how exactly do you make them? We asked food scientist Dave Dominguez to help us find the answer.


Got an appetite for knowledge? Send it to us at BrainsOn.org/contact and we promise we won’t give you the cold shoulder!

Transcript

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0:00.0

From the brains behind brains on, this is the moment of yum. Moment of them comes to you from 8 PM Studios. I'm Shayla Farsan and happy food week.

0:19.1

It's a whole week of delicious episodes leading up to Thanksgiving.

0:23.2

This year for Thanksgiving, I'm going to travel all the way across the country to visit my family,

0:30.7

and I'm so excited to be able to celebrate with them.

0:34.0

My mom makes us this special holiday breakfast

0:37.0

that's kind of like French toast,

0:39.0

but if French toast had a baby

0:41.0

with a grilled cheese sandwich. It sounds weird but it's really good I promise and I've

0:46.3

decided that this year I'm going to make my signature dessert. Triple Berry cheesecake

0:50.8

with a chocolate drizzle and a gram cracker crust. It's the best. But the only

0:56.6

problem is how in the world am I going to get it all the way across the country?

1:01.1

It won't stay cold long enough and what if it goes bad or worse

1:06.4

melt all over my pajamas and toothbrush in big gooey cheesecakey globes. Oh, hold on, what if I freeze dry it? That helps preserve foods from

1:19.3

fruits to ice cream and it makes them dry so no gooey mess. Plus I'll have the most

1:25.2

original dessert there. But I have no idea how to do it and neither does Gabriel. Hi, my name is Gabriel from Novi, Michigan,

1:38.0

and my question is, how do people freeze-dry food?

1:42.0

Well, as the name implies, it implies freezing, all right?

1:46.0

It implies drying.

1:47.0

Hello, my name is Dave Dominguez, and I'm a food scientist working for General Mills.

1:52.0

All right, well, we know what freezing is,

1:54.0

it's kind of reducing the temperature,

1:55.0

kind of the point to usually when water will freeze out.

...

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