To the novice, brewing can seem a bit daunting, but, as is the case with any hobby, that initial hesitation is replaced by confidence via experience. That same experience makes the task of brewing simpler, even as the process becomes seemingly more complicated. Brewing also gets the intellectual and creative gears turning, opening up a world of endless possibilities that can be taken to the homebrewery. Well-seasoned brewers often craft beer in rather Spartan fashion, relying on the interplay of medium and technique rather than the complication of an extensive list of ingredients. Brewers are now touting single malt and, even more impressively, single malt and single hop (SMaSH) beers. Homebrewers are especially keen to this idea, as it is not only a means to simplify a recipe (and ingredient list) but serves to test one’s brewhouse mettle in several ways. There is a myriad of base malt suitable for this approach and a number of brews that can be cobbled from each. Both classic styles and experimental brews are possible with basic attention to mash and kettle parameters in conjunction with a singular base malt. Minimalist brewing at its finest.
Why Single Malt?
Single malt brewing is not only a challenging and enlightening way to brew, but also has a direct connection to anachronistic ancient brewing practices. Professionals more often than not make historical beer styles as they present a safe perspective and tangible reference point, but most of the brews are based on styles that emerged after the advent of the specialty malts. Single malts capitalize on the properties of a particular malted barley, but also harken to a time when many brews were made from one type of malt. Those from Continental Europe were even given the name of the city in which they were developed, but also came to represent the signature style or characteristics of that city’s beer.
Pilsner, Vienna and Munich malts are examples, all of which are synonymous with the 19th century brews that were developed in each city, each beer bearing a distinctive color. Porters of the 18th and 19th centuries were often made from a single kilning, bringing their dark brown color and rough-hewn character to the brew. The rauchbiers of Bamberg are made with various measures of smoked malt, but some are single malt brews, made to the specifications of the brewery, often in-house.
English pale ale, American pale and mild ale malts are designed to provide a firm backbone in traditional ale recipes, but have plenty of delicate malty flavor to use without augmentation. Of course, from a pure technical point of view, brewing single malts allows the brewer a chance to examine the unique characteristics of the selected base malt while learning to shift the expression of that malt through further manipulation of mash and kettle.
Anyone who does all-grain brewing knows the effect that mash temperature has on the mouthfeel and fermentability of the wort and, ultimately, the balance and texture of the beer. This is especially important with single malts because there are no bodybuilding specialty grains to fall back on. The ratio and interplay of alpha (dextrin) and beta (maltose and other fermentables) amylase is dependent upon the temperature of the mash, and is, next to the malt type, the most crucial brewing decision. Single malt kölsch versus single malt Munich helles may have mash temperature as its only prefermentation variable, with a difference of 4 or 5 degrees Fahrenheit between the two.