Did you know that you can freeze milk?
I had done a little research on this topic before my shopping trip last week, and I decided I'd give it a try. I bought 2 gallons of 'whole' milk - for the baby. After all, the Wal-Mart sells it for quite a bit cheaper than what my local store does. When I pulled into the garage after shopping, the first thing I did was plop one gallon right into the deep freezer that sits next to my car's parking spot.9 days later (that would be today) I pulled the frosty jug of milk out of the deep freeze and am happy to report that - so far - my experiment has been successful. [That is to say - it did not explode in my freezer!]
In this post, I am going to address some of the more common questions regarding this process, however, I am sure a quick Google search can answer any additional questions that I can't answer.
A quick lesson in Homogenization and Pasteurization
We've all heard the terms before, but do you really know what they mean?
Normally, if left to sit, milk will separate into a high-fat cream layer on top of a larger, low-fat milk layer. Homogenization is a process where the milk goes through a treatment that prevents a cream layer from separating out the milk. This process breaks down the fat globules, which are then left exposed and vulnerable to certain enzymes already present in the milk, which could break down the fats and produce rancid flavors...SO...to prevent THAT, milk goes through pasteurization, which inactivates these enzymes. (Is that the longest run-on sentence ever, or what?!)
Homogenized milk is said to taste blander but feels creamier than its unhomogenized counterpart and may be more digestible by some people. Both processes help to extend the shelf life of milk.
There are many people following the "raw milk" trend, siting that these processes remove all bacteria (good and bad) and that raw milk is the way to go. I am all in favor of this opinion, however, there are some serious conditions to consider before switching your whole family to raw milk. In addition, it may not be legal for farmers to sell raw milk where you live. There are a lot of websites out there with a lot of information - and not all of it is true. Do your research FIRST.
Does frozen milk look different?
Frozen milk will turn yellow. Trust me, it just looks wrong. The yellow color comes from the fat separating from the milk. Once it thaws, though, it will return to its normal color.
Does freezing milk affect the nutrients or taste?
I've heard rumors that long, long ago milk was delivered to people's homes and left on the doorstep. It came in glass jars and, sometimes, if left outside during winter it would freeze. No one though it odd back then because the "milk" was already separated from the cream. When it would freeze, it would not look any different.
The nutrients do not change in frozen milk, but the fat does separate (that yellow color - eww!) and this is sometimes referred to as reverse homogenization. Since the milk and milk-fat separate, you will need to shake thawed milk before each use to help blend the fat back into the milk. It will not taste any different, but it may have a different texture since you're used to the commercial process of homogenization...versus shaking a jug of milk in your kitchen. For this reason, some people don't like thawed milk - and that's okay.
How long can I store frozen milk?
You can keep milk frozen for about 3 months. It's not going to spoil in the freezer, so you CAN leave it in longer, however it has a greater chance of absorbing other flavors from within your freezer, so be careful!
What temperature should I freeze milk at?
When freezing, milk should be stored at 0°F or lower.
Is it okay to freeze milk in the plastic jug from the store?
Yes, HOWEVER, don't forget middle school science...freezing liquids expand!
Most milk jugs are flexible enough for expanding milk, but some containers may not have enough room - so take precautions.
If you're not sure if your container will work, just pour out 1 cup before freezing.
How should I thaw frozen milk?
As with most frozen items, the best method is to thaw it in the fridge. This process can take 2-3 days.
If you need it quicker, it can be thawed in the sink with cold running water. Do NOT use hot water, however, it will damage your milk.
Once thawed, your milk should be good for up to a week, HOWEVER, that can depend on how cold your freezer was, how cold your refrigerator is, and how fresh the milk was when you first put it in the freezer.
I compare the date I went shopping with the "best by" date on the milk - this lets me know how many days I can expect out of the milk once I thaw it out.
I hope you find this post informative. As I stated above, any additional questions can probably be best answered online. These were just some of the highlights I found from a couple different sites and felt it was a good idea to compile them. While I don't know how necessary it will be for me to use this method on a regular basis, I do like the fact that I can pick up all my milk for the month in one trip (and from a store where it's cheaper) and have it on hand when needed.