Beer 101 is a new series on BrewNoob.com blog which helps answer common questions and breaks down popular topics and trends in the beer industry. As true Brew Noobs, we believe beer is fun because there are always new beers to discover and explore, and that we deepen our appreciation for the craft when we learn more about it. So to kick things off, this week we’re starting with the fundamentals of brewing beer- the 4 main ingredients -and we’ll explore each element in more depth in the weeks to come!
Beer 101: The 4 ingredients that make a Beer!
It’s been said that a beer only requires 4 ingredients: Grain, Hops, Yeast, and Water. In fact, the “German Beer Purity Law” written in 1487 say there can only be 3 of these ingredients, but that was before we had a good understanding of microorganisms like yeast (thanks Louis Pasteur!).To better understand the basic 4 ingredients of beer, let’s break down each element:
Barley is the grain which makes up the “body” of the beer, but really any sugar can be used to make beer (Belgian-style beers often use candy sugar) and some gluten-free beers use alternative grain like spelt, but barley remains the most popular source for brewing beer. Barley is a food common around the world, but when this grain is used in beer it's malted, meaning it has been dried/cracked open using heat so that the sugars and enzymes inside it are prepared to brew beer.
In the malting process, all kinds of different flavors come out of the “roast” in a drying kiln, everything from amber red to chocolate to roasted stout which give a beer its color and flavor profile. Some of these malts have a sweeter taste while others can be smokey, creating a whole spectrum of flavor profiles that help define the beer’s style.
Hops are bitter plant whose lightweight flower-buds provide flavor and aroma to beer. Typically described as a bittering agent added to beer, there are actually dozens of varities of hops with their own flavor profiles: everything from grassy and pine-cone to citrus and herbal, varying in intensity and concentration in each brewing style. Hops also have a natural preservative quality to them which helps protect the beer from bacteria and other microbes (without harming the yeast), making it a key ingredient in all beers, even those which don’t have a heavy “hoppy” taste to them like lagers and stouts.
H20 is often the most overlooked ingredient of beer, but since it makes up most of the brew it may be the most important element. In fact the mineral content of water has a huge impact on a beer’s taste because of how each element interacts with the other ingredients - think of how some people consider New York City pizza and bagels the best in the world because of the water source. Geography plays a strong role in water quality, so it’s no coincidence that some of the best stouts are brewed with mineral-heavy water running through the British Isles while the best lagers are brewed with clear water running down the Rhein River.
Without yeast there is no alcohol in beer, or any other fermented beverage like wine or whiskey for that matter. Yeasts are the microrganisms which eat the starches/sugars extracted from the grain of the beer and transform/digest it into two byproducts: alcohol and carbon-dioxide, which gives beer both its buzz and characteristic bubbles.
One aspect not as commonly understood about yeast is its ability to transform the flavor of a beer during the transformative reaction. Adding differing strains of yeast to the same beer recipe will change the taste of the beer, imparting flavors as diverse as: fruity, tart, sweet, clove-like, sour, and even “funky” flavors. Some styles of beer extract the yeast from the beer after fermentation to keep the bottled/canned beer from becoming skunked or exploding bottles as the yeast continue to eat the sugar, while a few styles keep the yeast active to create a cloudy “unfilitered” style of beer which many drinkers enjoy.
Of course there are lots more ingredients which can be added to any beer, but for the most part all beers share these 4 basic components. In the weeks to come we’ll start to get more in-depth about each ingredient to learn about how each impacts the taste of beer and contribute towards the different beer styles. But for now hopefully this helps bring you up to speed in our Beer 101 series!