As an expert sommelier and brewer, I can provide you with some insight into the shelf life of beer and whether it is safe to drink beer that is 2 years past its expiration date. While it is generally recommended to consume beer before its best before date, there are some factors to consider.
Firstly, it is important to understand that beer, especially lagers, are perishable products. The flavors and aromas of beer can change over time, and the quality may deteriorate. However, this doesn't necessarily mean that the beer is undrinkable or unsafe.
If the beer has been stored in the refrigerator, it can still be drinkable up to 6-24 months after its best before date. The cold temperature helps to slow down the aging process and preserve the beer's quality. However, after a certain point, the flavors may become flat or stale, and the beer may not taste as intended by the brewer.
On the other hand, if the beer has not been refrigerated and has been stored at room temperature, its shelf life is significantly shorter. In this case, the beer may be drinkable for up to 9 months after its best before date. Beyond that time, the beer may start to show signs of spoilage, such as off-flavors or possibly even a sour taste.
It is worth noting that some beers, particularly certain styles like strong ales or barrel-aged beers, can actually improve with age. These beers often have higher alcohol content and complex flavors that can develop and mellow over time. However, this aging process is usually done under controlled conditions by the brewer or a knowledgeable collector, and it is not recommended to age most commercially available lagers or lighter beers for extended periods.
Personal experiences and individual preferences also play a role in determining whether to drink beer past its expiration date. Some people may find that they enjoy the flavors that develop over time, while others may prefer the fresh and crisp taste of a beer within its recommended shelf life.
While it is generally safe to consume beer that is 2 years past its expiration date, the quality and taste may be compromised. If the beer has been refrigerated, it may still be drinkable, although the flavors may not be as vibrant as when it was fresh. If the beer has not been stored properly, it is more likely to have deteriorated and may not be enjoyable to drink. Ultimately, the decision to drink expired beer depends on personal preference and tolerance for potential changes in flavor and quality.