How To Tell If Milk Is Off – The Quickest & Best Method
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Want to know how to tell if milk is off? If you’ve been sniffing the bottle or carton, then you could be getting it wrong. Instead, here’s the best method so you’ll never unnecessarily waste a drop again.
Did you know that in the UK, one in six pints of milk is thrown away every year? We all know that you shouldn’t cry over spilt milk, but I think we should cry over wasted milk.
Dairy milk has one of the highest environmental footprints of any food, in terms of carbon, land, and water use, so wasting it, even accidentally, has a real impact.
Back in 2022, I loved it when the supermarket chain Morrisons made headlines when it announced that it was scrapping the use by dates on milk – switching to “best before” dates instead.
Unlike use-by dates, which relate to food safety, best-before dates indicate quality. Milk can often remain safe to drink for several days beyond the printed date, if stored correctly. By encouraging customers to use their discretion, Morrisons hoped to prevent millions of pints of milk from being thrown away unnecessarily every year.
So, if your milk has reached its best-before date and you still have some left, how do you determine if it’s spoiled or safe to use? Relying on the smell from the carton isn’t the most reliable method. Here’s why, and an easy test that I’ve found works much better.
Why The Carton Sniff Test Often Fails
When you sniff straight from the milk bottle or carton, the chances are that you are probably smelling the horrible dried-up milk around the rim rather than the milk itself. So you might detect a sour smell, even though your milk is perfectly drinkable.
The Best Method To Tell If Milk Is Off
Rather than sniffing the bottle, the very best way to tell if your milk is off or not is to pour a little bit of milk into a clean glass and then sniff the milk in the glass.Â
Here’s the full how-to:
- Pour a small amount of milk into a clean glass.
- Smell the milk in the glass. If it has a sour, tangy scent, it’s gone off. If it smells mild and slightly sweet, then it’s usually safe to use.
- You can also check the texture whilst it’s in the glass. Lumps, curdling, or separation are visual signs that the milk has gone off and is no longer safe to use.
The glass method gives you a much better idea of whether the milk is off or not. This way, the dried-up bits of milk around the rim aren’t going to throw you off the scent of fresh milk. I find this method fail-safe – you’ll never throw out perfectly good milk again!
How To Store Milk Properly
Remember, proper storage also plays a crucial role in maintaining milk quality.
You should keep milk refrigerated at all times, ideally at temperatures below 4°C. And if you can keep it in my main part of the fridge, rather than in the door, then that’s even better.
This is because the temperature there stays consistently cold, whilst food stored in the door warms up every time it’s opened. Repeated small temperature swings like that can cause milk to spoil faster than it should.
You should also never leave the milk out at room temperature for extended periods.
How Long Can Milk Last Past the Best-Before Date?
If stored correctly in the fridge at or below 4°C, cow’s milk can last around 3 to 5 days past the best-before date. Always check the smell and texture, though, as these are the most reliable indicators.
What About Plant-Based Milk?
I’ve switched to plant-based milk, and I’ve found that if you use these types of milk, such as oat milk, then the sniff test isn’t quite as reliable. Here’s my separate guide on how to tell if oat milk is off, which is much better suited for this purpose. I promise it’s just as simple and straightforward as this guide!
More Food Waste Tips
If you are looking for more clever tips like this, then try my tip to check to see if eggs are safe to eat past their best-before date. Like the milk tip, it’s been revolutionary for me!
Do you have any tips to reduce food waste? Do share in the comments below! And if you’re thinking about switching to oat milk, then here’s my guide to the best oat milk around.
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Put a little of the suspect milk in a cup & pour on some boiling water. Like grandpa’s method but saves wasting that cup of tea. With sour milk I use Mary Berry’s way of heating the milk and adding some lemon juice or white wine vinegar ( approx 2 teaspoons to a pint ) continue to heat gently & when it has really curdled strain it through a cloth in a sieve over a bowl. You are left with the milk solids which can be matured in the fridge into a soft cheese and the whey in the bowl. I use the latter to make scones, pancake batter etc. One must is that everything must be sterilized by pouring boiling water over it or possibly using Milton to ensure it is not contaminated by any bugs or fungi spores.
Some great tips Jan, thanks so much!
Off milk makes the best pancakes, scones, muffins and Yorkshire puddings.
Great tip Marie! I’ve only just had breakfast but now I’m craving scones and pancakes!
I was thinking about this one because our milkman leaves a random number of pints using some system which only he understands, so sometimes the milk is off. Does anyone have any suggestions for using sour milk?
Ha ha Owain, I think we must have the same milkman! Lots of good suggestions in the comments, such as pancakes, scones and yorkshire puddings. Also you can freeze milk too!
Milk can be frozen, this can change the flavour though.
I’m the milk and cream tester in our house, my OH has no idea. Luckily we’ve got stray farm cats that get fed daily and have milk put out, so unless the milk’s curdled, they’ll still drink it. Save a lot being thrown out, although I’m the only one who now has milk.
Mind you, my toddler is lactose intolerant, so needs ‘milk’ on cereal, but won’t drink any of the lactose free milk types on its own. It’s extremely hard to buy small cartons (and expensive), but would save so much waste for us on his milk (because there’s no way I’d drink it either!).