Enhancements Introduced to Increase Bitterness
In the intriguing world of beer brewing, the impact of different hop varieties and addition times on the bitterness has been a subject of much fascination. Jeff Schauland, the Roanoke Tasting Room Brewer at Deschutes Brewery, has been delving into this topic, uncovering fascinating insights.
Different hop varieties contain varying levels of alpha acids and essential oils that contribute differently to bitterness and aroma. For example, Mystic™ hops produce a clean and balanced bitterness with citrus aromatics, while Noble hops contribute unique characteristics without heavy bitterness.
The timing of hop additions also plays a crucial role. Early additions, made at the beginning of the boil, extract alpha acids that isomerize into iso-alpha acids, producing a sharper, more intense bitterness. Late additions, made during whirlpool or post-fermentation (dry hopping), contribute more aromatic oils and less bitterness, resulting in softer, more balanced bitterness with distinct flavor notes.
Schauland has found that adding hops before the 60-minute addition can create a more harsh bitterness. To prevent this, he recommends making the bittering addition at 60 minutes. Interestingly, Schauland's experiments have revealed that the claim that mash hopping and first wort hopping "lock in" flavor due to low temperature and pH is not true. Instead, he is exploring these concepts for flavor experimentation.
Different hop varieties can produce different types of bitterness. For instance, Azacca hops, with a co-humulone content as high as 45%, can lead to a harsher taste. However, Schauland is also considering the co-humulone content of hops when deciding on their bittering quality.
Schauland is not alone in his exploration. Deschutes Brewery, where he works, is experimenting with various hop varieties to find the optimal balance of bitterness in their beers. Other breweries are also following suit, such as the use of advanced hop extracts or processed hop products to fine-tune bitterness and aroma while reducing unwanted effects.
In summary, early hop additions from high-alpha acid varieties create sharper and more intense bitterness, whereas late or post-fermentation additions from aroma-focused varieties contribute softer, balanced bitterness with distinct flavor notes. The selection of hop variety combined with precise timing controls the bitterness character, intensity, and overall beer flavor profile. As brewers continue to experiment, the world of beer bitterness promises to remain an exciting frontier.
The exploration of hop varieties in beer brewing not only impacts bitterness but also influences the aroma, such as the clean and balanced bitterness with citrus aromatics from Mystic™ hops. Meanwhile, the food-and-drink sector also embraces technology, as breweries like Deschutes use advanced techniques like dry hopping to achieve a desired bitterness profile and flavor notes.
