How is beer made?

Beer is made from four ingredients: water, malt, hops, and yeast. Malt provides sugars and flavor, hops provide bitterness and aroma, and yeast converts the sugars into alcohol and CO2. This process is called fermentation, and together with mashing, boiling, and lagering, it forms the basis of every beer you drink.

From barley to malt: the basis of every beer

Everything starts with grain, and in most cases, that is barley. But you can't just use barley as is. It must first be malted, which is a three-step process. First, the grain is soaked in water, then it is allowed to germinate so that enzymes become active which later convert the starch into fermentable sugars, and finally, it is dried and sometimes roasted in an oven.

The temperature and time in that oven largely determine the kind of beer you end up with. Lightly roasted malt gives a blonde or pilsner flavor. Darker roasted malt yields notes of caramel, coffee, or chocolate. That is precisely why a stout tastes so different from a Weizen. Not magic, but malt.

Mashing: starch becomes sugar

The ground malt goes into hot water, around 65 to 70 degrees Celsius. This is called mashing. In that warm bath, the enzymes go to work and break down the starch into fermentable sugars. After an hour or more, you have a sweet, syrupy liquid, the wort.

The temperature during mashing is not random. If you brew a bit warmer, more complex sugars remain that the yeast cannot process. This gives a fuller, sweeter beer. If you brew cooler, almost everything ferments, resulting in a drier, sharper beer. Brewers consciously play with this.

After mashing, the wort is rinsed through the grain bed so that all the sugars are extracted. That liquid then goes to the boiling kettle.

Boiling and hopping: bitterness and aroma

The wort is brought to a boil, and then the hops are added. Hops are a climbing plant, and it is the flowers, actually cones, that are used. Adding them early in the boiling process provides bitterness. Adding them late, sometimes even after boiling, provides aroma. Think of citrus, flowers, resin, or tropical fruit, depending on the hop variety.

Boiling usually takes 60 to 90 minutes. During that time, unwanted substances also evaporate and the wort becomes sterile. Because if wild bacteria get into the tank, your batch is ruined. Hygiene is everything in the brewing process.

After boiling, the wort is quickly cooled. The faster it cools, the less chance of infection and the more unwanted proteins precipitate. Professional breweries do this with a plate heat exchanger. At home, you do it with a copper coil in a tub of ice water. Works perfectly fine too.

Fermentation: the yeast does the real work

Once the wort has cooled, the yeast is added. And then the magic begins. Yeast eats the sugars and produces alcohol, CO2, and a whole range of flavor compounds. Those flavor compounds, the so-called esters and fusel alcohols, partly determine the character of your beer.

There are two major categories of yeast: top-fermenting and bottom-fermenting. Top-fermenting yeast works at higher temperatures, 15 to 24 degrees, and is used for ales, wheat beers, stouts, and Weizen. Bottom-fermenting yeast works cold, 7 to 13 degrees, and is the basis for pilsners and lagers. That is why a pilsner is "lagered"—the beer matures cold in vats for weeks.

After the primary fermentation, which lasts from a few days to a week, a secondary fermentation or maturation period often follows. This rounds off the flavors, lets unwanted substances settle, and ensures the beer becomes clear. Some beers mature for a few weeks, others for months.

Filtering, carbonating, and bottling

After maturation, the beer is filtered or clarified. Not always, because some beers are intentionally cloudy, and that's part of the style. Think of a New England IPA or a Hefeweizen. But if you want a clear pilsner, you have to filter.

Then there is the carbonation. In industry, CO2 is injected from the outside. In smaller breweries and home brewing, a little sugar or wort is often added to the beer before bottling, so the yeast becomes active one more time in the bottle and creates its own CO2. This is called bottle conditioning and gives beer a finer, livelier carbonation.

And then bottling or kegging. After all that work, the beer deserves a good glass, and the right tools around it make the serving moment just as fun as the first sip. With the Wooden Bottle Carrier with Fixed Opener, you can carry six bottles at once and open them immediately as well—handy if you ever share a brew with friends yourself.

Frequently asked questions about how beer is made

How long does it take to make beer? That depends heavily on the type of beer. A simple ale is ready in two to four weeks. A traditional lager or pilsner needs cold maturation and can take six to twelve weeks. Specialty beers like a barleywine or a Belgian quadrupel can mature for months or even a year before they are at their best.

What makes every beer different in taste? Four things determine the taste: the malt type and roasting, the hop choice and timing of addition, the yeast strain and fermentation temperature, and the water. Yes, water. Hardness, mineral composition, and pH all have an influence. Dublin has hard water, ideal for stouts. Pilsen has soft water, perfect for light pilsners. Not a coincidence.

Can I brew my own beer at home? Absolutely. Home brewing is popular and more accessible than you think. With a starter kit from a brewing shop, you are ready for a first batch. You need a large pot, a fermentation vessel, a thermometer, and patience. The first time is rarely perfect, but you learn more from it than from ten brewery tours.

Do you want to keep track of your brewing sessions or just count how many bottles are finished on an evening with friends? The Bottle Opener with Digital Counter does that for you automatically—funny, but also revealing. And for everything else you need to take your beer culture at home more seriously, check out the beer accessories on Bierblij.nl.