Beer definitely has a smell, and it can vary depending on the type of beer and the ingredients used in its brewing process. As a sommelier and brewer, I've had the opportunity to experience and explore the different aromas that beer can offer.
One of the main factors that contribute to the smell of beer is the yeast used during fermentation. Ales and lagers, the two main categories of beer, use different types of yeast, which result in distinctive aromas.
Ales, typically fermented at warmer temperatures, tend to have a stronger and more complex smell compared to lagers. The yeast used in ales can produce a wide range of aromas, from fruity and citrusy notes to more robust and spicy scents. For example, certain ale yeasts can create aromas of orange, lemon, or grapefruit, adding a refreshing and zesty character to the beer. Others may give off hints of banana or clove, which are often associated with Belgian-style ales. These fruity and spicy aromas can be quite pronounced and add depth to the overall beer experience.
On the other hand, lagers, which are fermented at cooler temperatures, generally have a lighter and cleaner aroma. The yeast used in lagers produces fewer esters and other flavor compounds, resulting in a more subdued smell. While ales may have complex and bold aromas, lagers often showcase a more subtle and delicate fragrance. This can include light maltiness, slight floral notes, or even a touch of sweetness. The overall aroma profile of a lager is often more focused on the malt and hops used, rather than the yeast.
It's important to note that there are many other factors besides yeast that contribute to the smell of beer. The malt used in brewing can add various aromas, ranging from caramel and toffee to toasted or roasted notes. Hops, which are responsible for bitterness and aroma, can contribute a wide range of scents, including floral, herbal, piney, or even tropical fruit aromas. Additionally, adjuncts such as spices, fruits, or even coffee and chocolate can further enhance the smell of the beer.
While most beer aromas are pleasant and desirable, there can be instances where off-flavors and undesirable smells are present. These can occur due to various factors, such as contamination during brewing or storage, improper fermentation, or even the use of wild yeast or bacteria. In such cases, the beer might have off-putting smells, such as a sulfur-like or rotten egg aroma, or in extreme cases, even a resemblance to baby vomit. Fortunately, these instances are relatively rare and most beers exhibit pleasant and inviting smells.
Beer indeed has a smell, and it can vary greatly depending on the type of beer, yeast used, and other ingredients involved in the brewing process. From the fruity and spicy aromas of ales to the lighter and cleaner fragrances of lagers, the range of smells in beer is vast and can offer a diverse and enjoyable sensory experience. So, next time you crack open a beer, take a moment to appreciate its unique aroma before taking that first sip. Cheers!