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Walnut milk lasts in the fridge for about 5 to 7 days after you open it.
If it’s homemade walnut milk, the clock is much shorter.
You’re looking at around 3 to 4 days in the fridge for fresh homemade batches.
That’s the short answer to how long does walnut milk last in the fridge.
But there’s a lot more to know if you want to store walnut milk properly and avoid wasting it.
In this post, we’ll cover exactly how long walnut milk lasts in the fridge, how to tell when it’s gone bad, and the best ways to make it last longer.
Let’s get into it.
How Long Does Walnut Milk Last in the Fridge?
Walnut milk lasts in the fridge for different amounts of time depending on whether it’s store-bought or homemade.
1. Store-Bought Walnut Milk
Store-bought walnut milk usually lasts 5 to 7 days in the fridge once you open it.
Before opening, it can sit in your pantry or fridge for months thanks to preservatives and aseptic packaging.
But once that seal breaks, the countdown starts.
Always check the “best by” date on the carton, but remember that date only applies to unopened walnut milk.
After opening, those 5 to 7 days are your realistic window.
2. Homemade Walnut Milk
Homemade walnut milk lasts in the fridge for about 3 to 4 days.
It has no preservatives, so it spoils faster than the store-bought version.
If you want your homemade walnut milk to last a little longer, add a pinch of salt or a tiny bit of vanilla extract as a natural preservative.
Still, don’t push it past 4 days.
3. Factors That Affect How Long Walnut Milk Lasts
How long walnut milk lasts in the fridge depends on a few things.
The temperature of your fridge matters a lot.
If your fridge runs warm, walnut milk won’t last as long.
Keep it at or below 40°F for the best results.
How you store it also makes a difference.
An airtight container keeps walnut milk fresh longer than a loosely covered jar.
And how often you take it out matters too.
Every time you leave walnut milk sitting on the counter, bacteria get a chance to multiply.
How to Tell If Walnut Milk Has Gone Bad
Knowing when walnut milk has spoiled saves you from a nasty sip.
Here are the signs to watch for.
1. Smell Test
Fresh walnut milk smells nutty and mild.
Spoiled walnut milk smells sour, tangy, or just off.
If the smell makes you hesitate, toss it.
2. Texture Check
Walnut milk should be smooth and pourable.
If it looks curdled, chunky, or separated in a way that won’t shake back together, it’s gone bad.
Some natural separation is normal, but curdling is not.
3. Taste Test (With Caution)
If the smell and texture seem fine, take a tiny sip.
Sour or bitter walnut milk means it’s time to pour it out.
When in doubt, throw it out.
4. Color Changes
Fresh walnut milk is a creamy beige or light tan.
If it turns gray, yellow, or develops any discoloration, that’s a red flag.
Tips to Make Walnut Milk Last Longer in the Fridge
You can stretch how long walnut milk lasts in the fridge with a few simple habits.
1. Store It in the Coldest Part of the Fridge
The back of the fridge is usually the coldest spot.
Keep your walnut milk there, not in the door where temperatures fluctuate.
2. Use a Clean Airtight Container
Glass jars with tight lids work great for storing walnut milk.
Make sure the container is clean before you pour the milk in.
3. Don’t Drink Straight From the Container
Your mouth introduces bacteria to the walnut milk.
Pour what you need into a glass instead.
4. Freeze It for Longer Storage
If you can’t finish your walnut milk within a week, freeze it.
Pour it into ice cube trays or freezer-safe bags.
Frozen walnut milk lasts up to 3 months.
Just thaw it in the fridge overnight when you’re ready to use it.
5. Keep It Away From Strong Smells
Walnut milk can absorb odors from other foods in the fridge.
An airtight container prevents that problem.
So, How Long Does Walnut Milk Last in the Fridge?
Walnut milk lasts in the fridge for about 5 to 7 days if it’s store-bought and 3 to 4 days if it’s homemade.
That’s the simple answer to how long does walnut milk last in the fridge.
Always check for signs of spoilage like a sour smell, curdled texture, or changed color before drinking.
Store your walnut milk in an airtight container in the coldest part of the fridge.
And if you can’t finish it in time, freezing is always an option.
Hope this post has helped you understand exactly how long walnut milk lasts in the fridge and how to keep it fresh for as long as possible.