How to Turn Breast Milk Into Powder at Home: What You Should Know First

A freezer packed with milk bags can feel like a ticking clock. So it’s no surprise that powdered breast milk sounds appealing: no freezer space, easy travel, and milk that lasts. You may have seen videos showing how to dehydrate or freeze-dry breast milk at home, or ads for companies that do it for you.

We want to be honest with you here, because your baby’s safety comes first. There is no tested, recommended way to turn breast milk into powder at home. Below we explain why, what U.S. health agencies do and don’t say about freeze-dried breast milk, and the safer ways to store milk for the long term.

The short answer: home drying isn’t recommended

Making breast milk into powder at home, whether with a food dehydrator, an oven or a home freeze dryer, is not a method any major U.S. health agency recommends. The concerns fall into four groups.

1. Dry powders aren’t sterile

Drying removes water, but it doesn’t reliably kill germs. The CDC points out that powdered infant formula is not sterile and that Cronobacter bacteria can live in dry foods, including powdered infant formula and powdered milk. Infections are rare but can be very serious for newborns. A powder made in a home kitchen, without the controls used in commercial food production, has no safety testing at all.

Research on donor milk backs this up. A 2021 study comparing preservation methods for donor human milk concluded that freeze-drying alone was not enough to make the milk microbiologically safe; it worked best when combined with another treatment first.

2. Home equipment isn’t made for infant food

Home freeze dryers are marketed for foods like fruit, meals and snacks. They aren’t designed or tested for preparing food for babies, and there are no validated settings or quality checks for breast milk. Dehydrators and ovens are even less suitable, because they use heat.

3. Heat can damage what makes breast milk special

La Leche League advises against microwaving or boiling breast milk because high heat damages some of its protective properties. Drying milk with heat raises the same concern, on top of the safety questions.

4. Mixing powder back up is easy to get wrong

To feed powdered milk, you have to add water back in the right amount. Without a tested recipe, it’s hard to know what that amount is. With formula, the CDC warns that too much water fails to meet a baby’s needs, while too little can strain the kidneys and digestive system and cause dehydration. The same risk applies to any homemade powder.

What the FDA, AAP and CDC say about freeze-dried breast milk

As of October 2026, here is what we could confirm:

• CDC and AAP storage guidance covers only fresh, refrigerated and frozen milk. Neither includes freeze-dried or powdered breast milk, and neither gives storage times or preparation steps for it.
• We found no FDA approval, standard or guidance written specifically for freeze-dried breast milk or for companies that freeze-dry a parent’s own milk.
• The FDA’s general advice on human milk is that milk from other sources should come from a supplier that screens donors and takes safety precautions, such as an accredited milk bank. It lists contamination from improper pumping, handling, storage or preparation as a real risk.

In short, there is no official endorsement and no official safety guidance for freeze-dried breast milk in the U.S.

What about professional freeze-drying services?

Several companies offer to freeze-dry your milk and send it back as powder. Commercial equipment and processes are more controlled than a home kitchen, but the main concerns don’t go away: the powder isn’t sterile, research in babies is limited, and there’s no official guidance on how long it lasts or how to mix it.

If you’re still considering a service:

• Talk to your baby’s doctor first, especially if your baby is a newborn, was born early or has a health condition. These babies are most vulnerable to infections from contaminated powder.
• Ask the company how they test for bacteria, what standards they follow, and how they tell you to measure water when mixing.
• Use powder as a backup, not the main plan, and follow your pediatrician’s advice on safe preparation.

Safer ways to store breast milk long term

Freezing is the method health agencies back, and it works well.

Storage method	How long milk keeps (CDC)
Freezer, 0°F (-18°C) or colder	Within 6 months is best, up to 12 months is acceptable
Fridge, 40°F (4°C) or colder	Up to 4 days
Insulated cooler with frozen ice packs	Up to 24 hours

For more detail, see our full breast milk storage guide or get a use-by time from the breast milk storage calculator.

Tips to make freezing easier

• Freeze bags flat. Squeeze out the air and lay bags flat until frozen, then stand them up in a bin like files. They take up far less space and thaw faster.
• Freeze small portions of about 2 to 4 ounces (60 to 120 ml) so you only thaw what your baby needs.
• Label and rotate. Write the date on each bag and use the oldest milk first.
• Store at the back, not in the door, where the temperature is steadier.
• Think about a deep freezer if you have a large stash. A chest freezer holds a steadier temperature than a fridge-freezer.

When it’s time to use your stash, our guide on how to thaw frozen breast milk covers the safe methods.

Traveling with breast milk

For trips, carry milk in an insulated cooler bag with frozen ice packs and plan to refrigerate or freeze it within 24 hours. If frozen milk starts to thaw on the way but still has ice crystals, the CDC says it can be refrozen.

If your freezer stash is more than you need

If you have more milk than your baby will use, an accredited nonprofit milk bank may accept donations after screening. And if you’re pumping far more than you need, our guide on how to stop pumping explains how to cut back gradually.

When to call a doctor or lactation consultant

Contact your baby’s doctor if your baby has been fed homemade or commercial milk powder and develops vomiting, diarrhea, fever, poor feeding or unusual sleepiness. Seek care right away for a newborn with any of these signs.

A lactation consultant (IBCLC) can help you plan storage around work or travel and find a pumping routine that fits your needs. See our breastfeeding support page for where to start.