We are all aware that crying over spilled milk is unnecessary, but what about spoiled milk? Discovering that your milk has gone bad in the fridge can be quite frustrating. Although milk is a staple in most British households, many people are unaware of the science behind it.
With a bit of knowledge and a few adjustments, you can extend the freshness of your milk significantly. Interested in learning more? Keep reading for a comprehensive guide.
First and foremost, milk doesn’t spoil due to age but rather due to bacteria growth within it. The multiplication of bacteria in milk leads to the conversion of lactose into lactic acid, resulting in a sour taste and a lumpy texture.
While you cannot prevent milk from eventually spoiling, there are ways to slow down this process. Avoid introducing new bacteria into the milk, which means refraining from drinking directly from the bottle. Additionally, keeping your milk well chilled is crucial, as bacteria multiply faster above 4°C.
The longevity of your milk depends on the type you purchase and how you handle it. In the UK, the most common type is pasteurized milk, which undergoes a heating process to eliminate harmful bacteria, extending its shelf life to about 10 days unopened and three to seven days once opened.
Various plant-based milk alternatives are available today, with oat milk being a popular choice. Both refrigerated and UHT oat milk have different shelf lives, lasting around 7-14 days unopened and five to seven days once opened for refrigerated oat milk, while UHT oat milk lasts months unopened and needs to be consumed within 7-10 days once opened.
Filtered milk, like Arla Cravendale, undergoes extra filtration to reduce microbes, extending its shelf life to seven days after opening and 21 days unopened. UHT milk has the longest shelf life among milks, lasting six to nine months unopened and 7-10 days once opened.
Proper storage is essential for milk freshness. Ensure your fridge is set to around 2-3°C for optimal preservation. Store your milk towards the back of the fridge, as the door is warmer.
Filtered milk lasts longer due to the removal of impurities through a specialized filtration process and packaging in opaque bottles to shield it from light.
To determine if your milk is still fresh, use your senses: smell it for neutrality, check for lumps or thickness, perform the hot water test for curdling, and taste a small amount for sourness.
Remember, the “use by” or “best before” date is an estimate, and your milk may spoil before or after that date. Conduct these simple tests to ensure your milk is still good to consume.