How to warm up cold breast milk

Q: Can babies drink cold breastmilk?

Is it safe to feed babies cold milk? Yes, its safe to feed your baby cold milk. In fact, frozen breast milk can be used as a form of pain relief for teething babies!

When you are expressing, the breast milk you express should be chilled or frozen as quickly as possible.

Table of Contents Show

Defrosting frozen breast milk
Important
Warming breast milk
Important
If milk has separated
Things You'll Need
References
About This Article
Reader Success Stories
Did this article help you?
Should I warm up cold breast milk?
How do you warm up milk quickly?
Why can't you add warm breast milk to cold breastmilk?
Can babies drink cold breastmilk?

Follow these guidelines for defrosting and warming up expressed breast milk.

Defrosting frozen breast milk

Follow these guidelines for defrosting breast milk when you remove it from a freezer:

Breast milk can be defrosted in the fridge, normally in around 12 hours.
You can also hold the bottle or bag of frozen milk under warm running water (a maximum of 37 degrees Celsius or 99 degrees Fahrenheit).
Once fully thawed, previously frozen breast milk may be kept at room temperature for a maximum of 2 hours - or in the fridge for up to 24 hours.

Thawed breast milk left at room temperature should be fed to your baby within 2 hours or thrown away.

Important

Never re-freeze breast milk once thawed.

Freshly-expressed warm milk should not be added to already cooled or frozen milk, to prevent rewarming of the already-stored milk. It is best to cool down the newly-expressed milk first before adding it to older stored milk.

Warming breast milk

Healthy, full-term babies can drink breast milk at room temperature or warmed to body temperature.

Some healthy full-term and older babies can drink chilled milk when it is removed directly from the fridge. This is considered the safest choice.

To warm your milk, place the breast milk bottle or bag into a cup, jug or bowl of lukewarm water for a few minutes to bring it to body temperature (37 degrees Celsius or 99 degrees Fahrenheit). Alternatively, use a bottle warmer.

Do not allow the temperature to go above 40 degrees Celsius (104 degrees Fahrenheit).

Important

Do not heat breast milk in a microwave or saucepan. Heating breast milk until it is hot can destroy some of the good properties in the milk.

Using a microwave to heat any fluids for your baby can lead to uneven heating. These hot spots can scald your baby's mouth.

If milk has separated

You may notice that the milk has separated into layers, with the creamier content at the top.

It's better to swirl the milk in the container to mix the layers again rather than shaking the container. Shaking the container may damage some of the proteins and other components of the milk.

Page last reviewed: 25 April 2022
Next review due: 25 April 2025

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Breast milk stored in the freezer or refrigerator may need to be warmed before your baby will accept it. Warming breast milk is easy to do, but it is important that you take precautions to make sure that the milk does not become too hot for your baby or lose beneficial properties during the warming process.

1
Place the container of breast milk in the refrigerator.[1] Transfer the breast milk from the freezer to the refrigerator.
- Make sure to thaw frozen breast milk before it turns bad. When stored in a deep freezer, it can last from 6 to 12 months, but when stored in a standard freezer attached to the refrigerator, it only lasts 3 to 6 months. If kept in a freezer compartment of a refrigerator, breast milk is only good for 2 weeks.[2]
- Place the container of breast milk near the front of the refrigerator as you thaw it. The front of the refrigerator is slightly warmer than the back but still safe enough to thaw the milk.
2

Let thaw overnight. Give the container of breast milk about 8 hours to defrost completely.
- Check that it is thoroughly defrosted by opening the container and stirring it with a spoon or coffee stirrer. If you feel any frozen chunks of breast milk, allow the container to thaw in the refrigerator for another couple of hours or finish thawing it quickly by placing it under cool to lukewarm running water.
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3

Store up to five days. Thawed breast milk is best used immediately, but it is safe for your baby to drink when stored in the refrigerator for up to five days.
- Move the container to the back of the refrigerator, where temperatures tend to be the coldest.
4
Do not re-freeze. Re-freezing the breast milk can cause lipids in the milk to degrade. The milk will be of lower quality and may even start to spoil.

1

Place frozen breast milk under cool water. If you are warming breast milk straight from a frozen state, begin by holding the container of frozen breast milk under cool running water.[3]
- The water should be just slightly cooler than room temperature.
- Using cool water for this initial stage is recommended because it brings the temperature of the breast milk up more gradually. If you immediately jumped to hot water, you could cause hot spots to form along the outside while the inside remained frozen. Moreover, you could also accidentally destroy more of the valuable enzymes contained in the breast milk.
- Only use cool water until you feel that the breast milk has thawed. Looking into the container, you should only see liquid and no floating chunks of frozen breast milk. Gently shake the container to feel for hidden chunks of frozen milk.
EXPERT TIP
Rebecca Nguyen is a Certified Lactation Consultant and Childbirth Educator. She runs Family Picnic in Chicago, Illinois with her mother Sue Gottschall, where they teach new parents about childbirth, breastfeeding and child development and education. Rebecca taught preschool through 3rd grade for 10 years, and she received her Master’s Degree in Early Childhood Education from the University of Illinois in 2003.
There are a variety of ways to gently warm your milk. Lactation consultant Rebecca Nguyen says: "You can use a warmer to get the milk to exactly 98.6°, but if you've frozen your milk in a freezer bag, you can also just hold it under very warm water for 30 seconds to 1 minute until you can feel how warm it is. If it's in a bottle, submerge it in a pan of boiling water until it's very warm. However, don't put the milk in the microwave or directly into a pan, because you can get it too hot and burn the baby's tongue."
2

Gradually increase the temperature of the water. Slowly increase the temperature of the running water after the milk is thawed.
- Increase the water from cool to room temperature, from room temperature to warm, and from warm to hot. Bringing the temperature up slowly destroys fewer enzymes in the milk and heats it more evenly.
- Stop before the water begins to steam. You do not want to make the breast milk so hot that it burns your baby's sensitive mouth.
- Note that chilled breast milk is perfectly safe for your baby to drink, but if you have a fussy eater, you may need to warm it to room temperature to make it seem more appetizing.
3

Warm chilled breast milk under warm water. If you thawed the milk in the refrigerator or only had it stored in the refrigerator to start with, skip the cool water stage and place the container of breast milk directly under warm running water.
- Gradually increase the temperature of the water from warm to hot, stopping before the water begins to steam.
4

Swirl the milk around. Make sure that the breast milk is evenly warmed by gently swirling the container or bottle, thereby swirling the milk around.
- You could also even out the temperature by stirring the breast milk with a spoon or coffee stirrer.

1
Heat a pot of water. Fill a small saucepot halfway with water and heat it on the stove over medium heat. Once the water begins to steam but before it begins to simmer or boil, pull it off the stove.
- Do not allow the water to reach its boiling point, as it may end up heating the breast milk too quickly if it is this hot.
- Always pull the pot of water off the stove before preparing to put the bottle or container of breast milk inside. Never directly heat the breast milk over the stove.
2
Place the breast milk in the hot water.[4] You can either sit the bottle or container of breast milk in the pot of hot water or continually swirl it around in the hot water.
- It is safe to allow the bottle to touch the bottom of the pot once you remove the pot from the stove, but if you are still apprehensive, simply hold the bottle in the water without letting it touch the bottom.
- You can warm breast milk from a frozen or chilled state using this method. If you are warming breast milk from a chilled state, it should only take a few minutes. If warming it from a thawed state, it may take twice the time.
3
Make sure the temperature is even throughout. Carefully swirl the bottle or container of milk to even out the temperature.
- You could also stir the milk with a spoon or coffee stirrer to accomplish the same task.

1
Read the instructions. No two bottle warmers are exactly alike, so it is essential that you read the instructions thoroughly before using it.
- While the exact specifications and instructions vary from machine to machine, there are some general similarities.
- Note that many, though not all, bottle warmers can also double as baby food warmers for when your child starts eating solids and cereals.
2
Note whether the warmer uses a bath or steam.[5] Some bottle warmers warm the bottle in a hot water bath, but most use steam.
- Bottle warmers that use a warm water bath work the same, in principle, as a warm water bath you create without a bottle warmer. The bottle of breast milk is immersed directly into the heated water.
- Bottle warmers that use steam use less water. The water is heated in a separate compartment by a heating element or hot plate, and the steam comes up into the bottle compartment to warm the breast milk. This is a more gradual heating method.
3
Fill the water reservoir. Pour tap water into the reservoir up to the bottle warmer's "fill line."
- If the warmer has no fill line, check the instructions to determine how much water to use.
- Water bath warmers tend to use more water than steam warmers.
- The water should be changed in between uses for almost all water bath warmers and most steam warmers. Some steam warmers have reservoirs that stay filled until the levels dip too low, at which point a refill sensor light goes off.
4
Insert the bottle. Secure the bottle of breast milk in the warmer, placing it inside the bottle compartment.
- The bottle will sit loose in some warmers, while others may require you to "snap" it into place.
5
Set the control dial and warm the milk. Follow the instructions to determine how high or low to set the temperature dial, if the warmer has a dial. Press the start button and wait for the appliance to click off.
- Most bottle warmers have a sensor light that comes on and off to tell you when the warming session is done. Others also make a ring or alarm noise when the process is done.

Add New Question

Question
Does it matter if breast milk is warm or cold?

Rebecca Nguyen is a Certified Lactation Consultant and Childbirth Educator. She runs Family Picnic in Chicago, Illinois with her mother Sue Gottschall, where they teach new parents about childbirth, breastfeeding and child development and education. Rebecca taught preschool through 3rd grade for 10 years, and she received her Master’s Degree in Early Childhood Education from the University of Illinois in 2003.

International Board Certified Lactation Consultant
Expert Answer
Breastmilk may be more palatable to your baby if it's warm. An older baby might not be picky, but a newborn may not accept a bottle of milk unless it's close to your body temperature.
Question
Does breast milk separate when refrigerated?

Rebecca Nguyen is a Certified Lactation Consultant and Childbirth Educator. She runs Family Picnic in Chicago, Illinois with her mother Sue Gottschall, where they teach new parents about childbirth, breastfeeding and child development and education. Rebecca taught preschool through 3rd grade for 10 years, and she received her Master’s Degree in Early Childhood Education from the University of Illinois in 2003.

International Board Certified Lactation Consultant
Expert Answer
Yes, it's totally normal for breastmilk to separate in the fridge. However, you can swirl it gently to mix it. Vigorous shaking can damage some of the properties of the milk.

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Check the temperature of the warmed breast milk before giving it to your baby. Put a few drops on the inner part of your wrist. The milk should feel warm, but not uncomfortably hot.
As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy!

Do not bring the temperature of breast milk to a boiling point.
As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy!
Never heat breast milk in the microwave. Doing so can kill the living immune cells in the milk that help your baby fight disease. Moreover, microwave heating often creates hot spots that can burn your baby's sensitive mouth.[6]
As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy!

Things You'll Need

Small saucepot
Spoon or coffee stirrer
Bottle warmer

References

About This Article

Article SummaryX

If you need to warm breast milk that’s been stored in the refrigerator, place the container of milk directly under warm running water. Gradually increase the temperature of the water from warm to hot, stopping before the water begins to steam. If you prefer, you can place the container into a saucepot of water that you’ve heated on the stove instead of holding it under running water. With either method, make sure the breast milk is evenly warmed by gently swirling the container or bottle, and test the temperature on your inner wrist before giving the milk to your baby. To learn how to defrost frozen breast milk, keep reading!

Did this summary help you?

Thanks to all authors for creating a page that has been read 612,337 times.

Reader Success Stories

"How to warm up a breast milk helped me most."

Did this article help you?

Should I warm up cold breast milk?

Warming stored breast milk before serving it to your baby is a personal choice. Many babies like breast milk warm if they take it from a bottle, since breast milk is warm when babies nurse. Warming up breast milk also helps the consistency after it's been stored.

How do you warm up milk quickly?

The microwave method: Pour milk into a microwave-safe container and microwave on medium-high (70%) power, stirring every 15 seconds, just until steam begins to rise from the milk. To scald milk for custards or yogurt, heat 250 mL (1 cup) on high for 2 to 2 ½ minutes.

Why can't you add warm breast milk to cold breastmilk?

Mixing freshly expressed breast milk with already cooled or frozen milk is not advised because it can rewarm the older stored milk. It is best to cool freshly expressed milk before combining it with older, previously cooled or frozen milk. It is also important to consider storage duration guidelines for breast milk.

Can babies drink cold breastmilk?

Is it safe to feed babies cold milk? Yes, it's safe to feed your baby cold milk. In fact, frozen breast milk can be used as a form of pain relief for teething babies!

warm cold breast milk

How to warm up cold breast milk

Defrosting frozen breast milk

Important

Warming breast milk

Important

If milk has separated

Video

Things You'll Need

References

About This Article

Reader Success Stories

Did this article help you?

Should I warm up cold breast milk?

How do you warm up milk quickly?

Why can't you add warm breast milk to cold breastmilk?

Can babies drink cold breastmilk?

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