Can You Freeze Oat Milk? Here’s All You Need To Know

To support the running costs of Moral Fibres, this post contains affiliate links. This means Moral Fibres may earn a small commission, at no extra cost to readers, on items purchased through these links.

Can you freeze oat milk? Yes you can! Read on for how to preserve oat milk in the freezer for up to three months, and our top tips for freezing and defrosting.

Whilst any non-dairy milk is great for the environment compared to cows’ milk, not all non-dairy milk is equal.

I always feel that oat milk is a great sustainable choice. It’s better for the environment than many other vegan milk substitutes. Almond milk is water intensive. Meanwhile, coconut milk has to travel a long way to get to us.

As an oat milk aficionado – and trust me, I’ve tried all the oat milk to find the best one – something I always wondered about was what to do with any leftover milk.

I almost always finish an opened carton of oat milk. However, on the odd occasion when we are going away somewhere for a few days and can’t take the milk with us, then what to do?

With the increasing costs of food and the environmental impact of food waste, It feels so wrong to pour perfectly good oat milk down the drain. To help beat food waste, instead, I looked for ways to preserve any leftover milk.

Yes, You Can Freeze It!

Bottle of oat milk surrounded by oats, with a blue text box that reads how to freeze oat milk to help beat food waste.

Good news! It turns out that yes, you can freeze oat milk for up to three months. The defrosted oat milk should then be used within 2 to 3 days of thawing.

What I’ve found is that oat milk settles in the freezing process. This means it can be a little grainy when you defrost it. However, it’s completely fine to use.

Due to the graininess, I personally would not use defrosted oat milk in tea, coffee, or cereal. When you heat up the oat milk though, you don’t notice the graininess. As a result, I’d say defrosted oat milk is best used in cooking. Alternatively, you can heat the oat milk and use it to it make a milky coffee or hot chocolate.

How to Freeze Oat Milk

I’ve been experimenting with the best way to freeze oat milk.

I have tried freezing milk in jars. What I found is that unless your recipe calls for a lot of milk then the milk just languished in my fridge for too long. The last time I tried this method we ended up having to pour a jar of milk down the drain as nobody wanted it in their cup of tea.

For that reason, I now freeze oat milk in an ice-cube tray so I have pre-portioned sizes of frozen milk on hand that I add directly to sauces. Pre-portioning the milk before freezing also means you can add it to your cooking without the need to defrost the milk beforehand. As such, it’s ice-cube trays all the way now!

I use a plastic ice cube tray because I’ve had it forever, and binning it and replacing it with a metal ice cube tray is not in any way sustainable. However, if you don’t have an ice-cube tray you can get lovely metal ones*.

To free up space, once your cubes are frozen, you can pop them out into a labelled tub or bag.

How To Use Your Frozen Cubes

Frozen cubes can also be added to smoothies. Because you’re blending the smoothie, this means you won’t detect any graininess.

I’ve also found that Oatly Barista Milk separates when it’s frozen. It’s made with rapeseed oil so this oil tends to rise to the top when you defrost it. However, giving it a good mix when you are cooking sorts that all out.

Never refreeze already-defrosted oat milk. And as always, make sure your milk hasn’t expired before freezing it.

What About Freezing Soy Milk Or Any Other Type of Non-Dairy Milk?

All other types of no-dairy milk (and regular cow’s milk) can be frozen. Again, they might go grainy like oat milk or may lose some of their texture or taste, so I’d always recommend the ice-cube tray method.

Found this post useful? Please consider buying me a virtual coffee to help support the site’s running costs.

Your subscription could not be saved. Please try again.
Your subscription has been successful.

Join The Mailing List

Be part of the community and get all the latest articles, news and tips on green living from Moral Fibres straight to your inbox, once a month, free of charge.