How to Freeze Dry Blueberries

how to freeze dry blueberries banner with text

Freeze Dried Fruits

Blueberries are awesome, especially when they’re in season – which happens to be now! We bought boxes of them really cheap. Since we’re going camping, we went ahead and freeze-dried them for snacking on the trip.

Materials for freeze drying

For freeze drying, you will need:

  • Tray
  • Parchment paper
  • Berries

Once you have got them ready, it’s time to start the freeze-drying process.

How To Prepare The Berries

We washed the berries thoroughly under running water, then let them dry. They’re not totally dry in our video, though. It’s best to have them totally dry to avoid unnecessary crystallization during the process.

Another important thing to consider when you’re freeze-drying blueberries is the skin. Anything that has a thick outer membrane will take longer to freeze dry. So the fastest way to freeze dry the blueberries is to cut them in half or at least pierce the skin.

This is easy when you’re doing large fruits like kiwis and bananas. But if you’re going to cut blueberries, especially the large box that we had? It’s already the Second Coming, and you’ll still be nowhere finished.

Some suggest you pulse the berries in a blender or food processor just to break the skin. Still, that won’t give you consistent results, and you’ll end up with smaller-sized berries with big ones.

Others say you could use a new, unused doggie brush and pierce the berries with the bristles. The self-cleaning ones make the job easier since you don’t have to frequently stop to clean as you go.

Yeah, it can be an iffy idea, so others use a meat tenderizer instead. Not the heavy metal ones that have blunt edges. There are ones with sharp spikes that you can use. Unfortunately, they’re not as fine as the brush, so you might end up with mashed berries while you’re getting the hang of it.

To Pre-Freeze Or Not To Pre-Freeze

Pre-freezing can help shorten the freeze-drying time. It’s especially useful during the summer or times when the temperatures are hot.

Some (like us) don’t pre-freeze their blueberries before the process, and it’s okay. Maybe you’re in a hurry or need to do something else. Because when you pre-freeze blueberries or any food, you need to keep the freezer closed and undisturbed for at least 24 hours or until the food is frozen. If you have a family with kids, keeping them from opening the freezer door will be a challenge.

Why do you need to keep the freezer door closed? Because opening and closing interrupt the freezing cycle, causing undesirable crystals to form in the food. These crystals interfere with the consistency of the food, especially when you’re freeze-drying ones with high water content.

If you’re going to pre-freeze, use the tray you’ll be using in the freeze dryer. This way, the berries, and the tray are at freezing temperature and ready for the freeze dryer.

But it’s okay if you don’t have the time or the capacity to pre-freeze your blueberries. Just load them in the freeze dryer and let it do the work for you.

loading blueberries in freeze dryer

How To Freeze Dry Blueberries

Once you’ve got your blueberries ready, it’s time to start freeze drying!

  • Line up your trays with parchment paper.
  • Place the berries on the tray on an even layer – no stacking or piling. Make sure they’re completely dry before you place them on the tray.
  • If you’re going to use pre-frozen berries, cool the freeze dryer first to prevent melting and crystallization.
  • Set the timer to 24-36 hours. For this batch that we made, it took a total of 33 hours since we didn’t cut or pierce them.
  • Load the food in the freeze dryer when it’s ready and close the drain valve.
  • Close and lock the chamber, then start the freeze-drying process.

How To Know When The Berries Are Ready

The berries should have some crystallization (because of the high sugar content) and be crunchy. When


you press them, they pulverize on pressure. So when you eat it, it should have that light, airy texture with a satisfying ASMR crunch.

freeze dried blueberries on tray


How Do Freeze Dried Blueberries Taste Like?

They’re really good and sweet. Kind of like eating crunchy candy that’s airy at first and then explodes with flavor once it gets rehydrated in your mouth. It’s no wonder why kids love them. A tray of blueberries wasn’t enough for them, even if they had some other fruits during the camping trip.

Freeze-drying blueberries can be a long process because of the skin. So either you freeze-dry a big batch to make the most out of it. Or do like we did and freeze dry other fruits for an economical freeze drying. Just remember to take out the other fruit trays as they don’t need the same number of hours for freeze drying.

Where To Use The Freeze Dried Blueberries

There are different ways to use the berries.

For a satisfying breakfast, you can add them to cereals, pancakes, or waffles.

Others make colorful and tasty frosting by grinding the freeze-dried blueberries into powder. You can also add them whole to your cupcake or bread batter. Just remember to add in additional water because they’ll suck in liquid.

And since the season’s kind of hot, why not make a refreshing drink out of it? Grind them into a fine powder and make your own blueberry mix drink.

Got some questions on how to freeze dry blueberries? Let us know in the comment section!

Also, don’t forget to follow us on YouTube for more freeze-drying tips and videos!


  1. Darla says:

    Sorry I hit post on accident. OK so I have these organic blueberries I put them in the trays I freeze dried them for 2 days now. When I take them out they are crunchy but they’re also a little bit sticky because they’re sticking to the tray. I probably should have put parchment paper down, But is a tiny bit of stickiness a problem? They will be stored in a mylar pack with an oxygen absorber

    • Hi, Darla. Yes, that stickiness is going to be a problem because this means there’s still moisture left in the berries. Have you tried adding 2-4 hours of extra dry time?

  2. Jim says:

    Thanks for your article.
    I tried to FD some blueberries which were punctured. Allowed it to run for 43 hours. Sticky, product which was rubbery. Clearly not proper.
    Any ideas?

    • Hi, Jim. Can you tell us how you freeze-dried your blueberries? Please feel free to be as detailed as possible, so we’ll see where the problem came from. But the common issues we saw were:

      1) The blueberries weren’t punctured well
      2) The berries were too crowded in the tray. It’s best to allow the moisture to move out of the berries.
      3) The trays were left too long in the freeze dryer when the chamber was cold.

Leave a Reply