Can you freeze milk? Yes. Cow’s milk can be frozen for up to about 3 to 6 months, and it is safe to drink once thawed in the refrigerator.
Whether you bought one gallon too many, are heading out of town, or want to stock up before a busy week, freezing milk is an easy way to cut waste. It just helps to know how milk changes in the freezer and how to thaw it so it still tastes good.
This guide covers how long you can freeze milk, how to freeze and thaw it, why it looks different afterward, whether frozen milk is okay for toddlers, and the separate rules parents need for breast milk and formula.
Key Takeaways
You can freeze cow’s milk for up to about 3 to 6 months; it tastes best if used within 1 month.
Leave room for expansion, freeze in small portions, and label with the date.
Always thaw milk in the refrigerator, shake well, use within a few days, and do not refreeze.
Thawed milk may look grainy because the fat separates. It is safe, and a quick shake or blend helps.
Breast milk freezes well (about 6 months best, up to 12 months acceptable). Infant formula should not be frozen.
Table of Contents
Can You Freeze Milk?
Yes, you can freeze milk. Cow’s milk freezes well for up to about 3 to 6 months, though it tastes and pours best if you use it within about a month. Freezing stops bacteria from growing, so frozen milk is safe as long as it was fresh when it went into the freezer and you thaw it properly.
The catch is texture. As milk freezes, the water forms ice crystals and the fat separates. After thawing, milk can look a little grainy or have yellowish flecks. That is normal and safe. A good shake usually brings it back, and it is perfect for cooking, baking, smoothies, and oatmeal even if it is not quite as smooth as fresh.
How Long Can You Freeze Milk? Quick Chart
Type of milk
Freezer time
Notes
Whole, 2%, 1%, and skim cow’s milk
Up to 3 to 6 months; best within 1 month
Skim and low-fat milk separate less than whole milk.
Breast milk
About 6 months is best; up to 12 months is acceptable
CDC guidance; store in the back of a deep freezer at 0°F (-18°C) or colder.
Infant formula (powder or prepared)
Not recommended
Manufacturers advise against freezing; it can separate and change texture.
Lactose-free milk
Up to 3 months
Behaves like regular cow’s milk.
Oat, almond, and soy milk
Up to about 3 months
Separate more; best for cooking and smoothies.
Buttermilk and evaporated milk
About 3 months (buttermilk)
Use for baking after thawing.
Freezer guidelines for common milks. Always check the label, and discard milk that smells sour after thawing.
How to Freeze Milk the Right Way
Freeze it fresh: freeze milk well before the date on the carton, ideally as soon as you know you will not finish it.
Leave room to expand: milk expands as it freezes. Pour a little out of a full jug, or leave at least an inch of headspace in containers, so they do not split.
Use airtight, freezer-safe containers: plastic jugs, freezer bags laid flat, or ice cube trays. Glass can crack, so avoid it unless it is made for the freezer.
Portion it: small containers and cubes freeze and thaw faster. Milk ice cubes are perfect for smoothies or a splash in coffee.
Label and date it: write the date and type of milk on every container.
Keep it cold: store milk at 0°F (-18°C), away from the freezer door, where temperatures swing.
How to Thaw Frozen Milk Safely
Always thaw milk in the refrigerator, not on the counter. A small container may thaw in a day; a full gallon can take up to two days. For faster thawing, you can place a sealed container in a bowl of cold water, changing the water every 30 minutes, and use the milk as soon as it thaws.
Shake well once thawed to remix the fat.
Use thawed milk within a few days, and do not keep it past the original date on the carton.
Do not refreeze milk that has fully thawed.
Smell and look before using. If it smells sour, looks chunky after shaking, or tastes off, throw it out.
A quick trick for better texture: blend thawed milk for a few seconds with an immersion blender. It smooths out the grainy bits and makes it nicer to drink straight.
Tired nights don’t have to last forever.
Our free two-minute quiz builds a gentle, personalized sleep plan for your baby’s age and temperament.
Yes. Frozen and properly thawed cow’s milk is safe for toddlers. The AAP advises whole milk for most children from 12 to 24 months (unless your pediatrician suggests otherwise) and low-fat or skim milk after age 2. Because whole milk separates the most, shake it well or blend it so your toddler gets the fat along with the rest.
Some toddlers notice the slight change in taste or texture. If yours pushes it away, use the thawed milk for cooking, oatmeal, pancakes, or smoothies and serve fresh milk in the cup. Keep total milk to about 16 to 24 ounces a day for 1 year olds, since too much milk can crowd out iron-rich foods and contribute to iron deficiency.
Remember that babies under 12 months should not drink cow’s milk as a main drink. They need breast milk or formula. Small amounts of cow’s milk cooked into foods are fine once your baby has started solids. See our guide to how to transition from formula to milk when your baby turns one.
Can You Freeze Breast Milk?
Yes, and it is one of the best ways to build a stash. According to the CDC, freshly expressed breast milk can be stored:
Where
How long
Room temperature (77°F / 25°C or colder)
Up to 4 hours
Refrigerator (40°F / 4°C)
Up to 4 days
Freezer (0°F / -18°C or colder)
About 6 months is best; up to 12 months is acceptable
Thawed in the refrigerator
Use within 24 hours; do not refreeze
Leftover from a feeding
Use within 2 hours after the baby finishes
Breast milk storage guidelines for healthy, full-term babies. Source: CDC.
Freeze breast milk in small portions (2 to 4 ounces) in breast milk storage bags, leave space at the top, and thaw the oldest milk first. Never thaw or warm breast milk in the microwave, which creates hot spots that can burn your baby’s mouth. For the full details, read how long frozen breast milk lasts.
Can You Freeze Formula?
It is best not to. Formula makers generally advise against freezing powdered or prepared formula, because freezing can cause the ingredients to separate and it offers no real benefit. Prepared formula keeps up to 24 hours in the refrigerator, and powder keeps for about a month once the container is opened. Once your baby starts drinking from a bottle, use it within an hour and throw away the leftovers. More detail is in our guide to how long formula can sit out.
Freezing does not kill bacteria; it only pauses their growth. That is why milk must be fresh when you freeze it and thawed in the refrigerator. Never give raw (unpasteurized) milk to babies or children, frozen or not, since it can carry dangerous germs like E. coli, Salmonella, and Listeria. If your child has a milk allergy or you have questions about which milk is right for their age, talk with your pediatrician.
Frequently Asked Questions
Can you freeze milk?
Yes, you can freeze milk. Cow’s milk keeps in the freezer for up to about 3 to 6 months, with the best taste within about a month. Thaw it in the refrigerator and shake it well before using.
Why does milk look weird after freezing?
Freezing separates the fat and water in milk, so thawed milk can look grainy, watery, or have yellowish flecks. It is still safe. Shake it well or blend it briefly to smooth it out.
How long is milk good after thawing?
Use thawed milk within a few days, keep it in the refrigerator, and do not use it past the original date on the carton. Do not refreeze milk once it has thawed.
Can you freeze milk in the plastic jug?
Yes, but pour out a little first. Milk expands as it freezes, so a full jug can bulge or split. Leaving about an inch of space at the top prevents that.
Is frozen milk okay for toddlers?
Yes. Properly frozen and thawed cow’s milk is safe for toddlers over 12 months. Shake whole milk well so the fat mixes back in, and keep total milk to about 16 to 24 ounces a day.
Calmer days, better nights.
Betteroo builds a personalized sleep plan for your baby. Take the free two-minute quiz to get started tonight.
