The ingredients of beer: water, grain, hops, and yeast

Beer is a beverage that has fascinated humanity since ancient times, and its production remains an art form that combines history, tradition, and innovation.

To fully understand this beverage, it is essential to know its basic ingredients: water, grain (usually barley), hops, and yeast. These four components are the basis of any beer, and their correct selection and combination determine its quality, flavor, and authenticity.

Below, at Beer Republic, we invite you to discover the ingredients in beer and the importance of each one in its production.

What the ingredients of beer are

Since antiquity, brewing has been an art passed down from generation to generation, with each region contributing its own unique touch and adapting recipes to local resources.

Although the technique has evolved, the combination of water, grain, hops, and yeast forms the foundation of this ancient beverage, showcasing the brewers' skill and their connection to history and the land of origin.

Curiosity about what ingredients are in beer leads us to explore its essential components:

• Water: this is the main component of beer; its quality and mineralization are fundamental to the final flavor.
• Grain: malt is made from barley (grain) that is germinated, dried, and roasted. The way it is roasted determines the color and flavor of the beer.
• Hops: these flowers provide bitterness and aroma, in addition to acting as natural preservatives, ensuring the freshness of the beverage.
• Yeast: this single-celled organism is responsible for fermentation, transforming the sugars in the malt into alcohol and carbon dioxide.

The selection of these ingredients not only determines the beer's flavor profile, but also reflects the quality and authenticity of the product. Transparency in the ingredient list builds consumer trust and highlights breweries' commitment to excellence.

Next, we will develop each of these ingredients in more detail and explain their importance in the brewing process.

Beer ingredients: water

This ingredient accounts for about 90% of beer. Its quality is essential and can influence various aspects such as flavor, aroma, and even the color of the beer. The concentration of minerals like magnesium and calcium, known as water hardness, directly affects how the beer is perceived on the palate.

For example, harder waters can enhance the flavors of dark beers, while soft waters are ideal for light beers. This is one of the reasons why many wonder what goes into beer in terms of its composition.

In the past, breweries were built in places where there was water suitable for the type of beer they wanted to produce. A good example is Burton-on-Trent, famous for its water rich in calcium sulfate, which is ideal for Pale Ales that are known for being strong and very aromatic.

Beer ingredients: grain

Barley is the preferred grain for brewing, partly due to the robustness of its husks, which make it easier to filter after mashing (a process within beer production that we will discuss in another post). Wheat, oats, and rye have the same tradition in brewing; however, they have the drawback that their grains disintegrate easily.

Many brewers experiment with using older grains like spelt, buckwheat, farro, and others because of the different flavors they provide and, in some cases, for use in the growing gluten-free beer market. But, in general, barley remains king.

In the world of beer, it is important to distinguish between the grain and the malt. The grain, usually barley, is the initial ingredient. Malt, on the other hand, is the result of the malting process, where the grain is transformed through three phases: germination, kilning, and roasting.

Beer ingredients: hops

Scientifically known as Humulus lupulus, it is a perennial climbing plant that can grow over five meters in height. There are several types of hops, such as Cascade, Magnum, Saaz, Amarillo, Citra, Simcoe, and Nelson Sauvin, each with unique characteristics that provide bitterness, aroma, and flavor to the beer.

To brew beer, only the cones of the female plants are used before they are fertilized. These contain resins, essential oils, and tannins. In the case of resins, they represent between 10% and 20% of fresh hops and are key in craft beer as they provide bitterness, balancing the sweetness of the malt.

In addition, hops act as a natural preservative, helping to maintain the freshness of the beer by preventing the growth of unwanted bacteria and yeast. They also contribute to the formation and retention of the head; furthermore, they provide unique aromas and flavors that can be floral, citrusy, earthy, or resinous.

Beer ingredients: yeast

Yeast is a single-celled fungus responsible for fermentation within the brewing process, converting the sugars in the malt into alcohol and carbon dioxide.

But its function goes further: it also provides flavor and aroma. There are different strains of yeast, each with its own characteristics; some yield fruity aromas, while others provide spicy or earthy notes.

Today, there are two main types of yeast used in brewing: Saccharomyces carlsbergensis for bottom fermentation and Saccharomyces cerevisiae for top fermentation. These yeasts are vital not only for their ability to ferment, but also for their richness in vitamins and proteins.

Other components of beer

In addition to basic ingredients like water, grain, hops, and yeast, the world of beer offers endless possibilities. The brewing guild is very innovative, and many breweries experiment with spices, fruits, honey, and other additives, creating unique and exciting beers.

Moreover, in other parts of the world, various traditional ingredients are used to brew beer. For example, in Europe, America, and Australia, barley is commonly used; in Africa, beer is made with millet; in Japan, rice is used; and in pre-Columbian America, it was made with corn (known as chicha), cassava, and potato.

There are also beers made with rye, sorghum, ginger root, and hearts of palm. In Rwanda and Uganda, beer is even produced based on green bananas. Likewise, in ancient recipes, ingredients such as poppies, mushrooms, aromatic plants, honey, sugar, bay leaf, butter, and breadcrumbs were added.

This diversity of ingredients and brewing methods further enriches the fascinating world of beer.

Resources

• Brewers Association. (2023). Draught Beer Quality Manual. Brewers Association. Retrieved from: link.
• EBC (European Brewery Convention). (2020). The Beer Quality Handbook. EBC. Retrieved from: link.
• Mallett, A. (2019). Water: A Comprehensive Guide for Brewers. Brewers Publications. Retrieved from: link.
• McGinnis, J. (2018). The Complete Joy of Homebrewing. HarperCollins. Retrieved from: link.
• Palmer, J. J. (2017). How to Brew: Everything You Need To Know To Brew Beer Right The First Time. Brewer's Publications. Retrieved from: link.
• White, C. & Zainasheff, J. (2010). Yeast: The Practical Guide to Beer Fermentation. Brewers Publications. Retrieved from: link.