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Hard seltzer and the limits of the definition of beer

Hard seltzer appeared out of nowhere and in a few years became one of the hottest segments of the alcohol market, especially among younger consumers looking for a light, low-calorie alternative to beer. These fruity, carbonated drinks are sold alongside beer, made by breweries and often subject to the same regulations, and yet in flavour they have almost nothing in common with beer. This raises an interesting question: what actually is hard seltzer and where does the line of the definition of beer run? In this post we will explain how seltzer is made, why it is technically not beer, why breweries make it anyway and what this phenomenon says about the fluid boundaries of categories of alcoholic drinks. It is a fascinating case at the meeting point of production and marketing.

What hard seltzer is

Hard seltzer is, at its simplest, carbonated water with alcohol and an added flavour, most often fruity. It is a drink from the highball family, combining soda water, alcohol and aromas into a light, refreshing drink with low sugar content. Characteristic of it is neutrality: instead of the vivid, grainy flavour of beer or the sweetness of wine, seltzer is a light, clean base with a subtle fruity accent. The alcohol content usually hovers around five percent, similar to beer. It is a product designed for lightness and refreshment, often advertised as low-calorie and gluten-free. Hard seltzer responds to the demand of consumers who want to drink something alcoholic, but avoid the heaviness of beer and calories. It is a modern drink, consciously positioned as a healthier and lighter alternative to traditional drinks.

How it is made

The way hard seltzer is produced is the key to understanding why it is not beer. Instead of mashing malted grain, as with beer, producers most often go straight to fermenting pure sugar, often cane sugar, dissolved in water. Yeast turns this sugar into alcohol, giving a clear, neutral fermentation product. The alcohol thus produced is then thoroughly filtered to obtain a colourless, odourless and flavourless base, acting like a clean canvas. Only then is the drink carbonated and natural or artificial fruit aromas added to it. The result is a light, carbonated drink with a clean profile. The whole process skips two foundations of brewing beer: mashing the malt and hops. That is why hard seltzer, although it is made through fermentation, differs technologically and in flavour from beer in a fundamental way, closer to a neutral base than to a complex beer brew.

Why it is not beer

Beer has a strict definition based on raw materials and process. It is made by mashing malted grain, most often barley, in hot water to extract the sugars that form the wort, which is then boiled with hops and fermented with yeast. It is malt and hops that give beer its characteristic flavour, body, bitterness and aroma. Hard seltzer skips both of these key elements: there is no mashing of malt or hops in it, and pure sugar is fermented. As a result it lacks the grainy character, malty fullness and hop bitterness that define beer. In flavour they are two different worlds. That is why, from the point of view of the traditional definition, hard seltzer is simply not beer, but a separate category of fermented drink. This distinction is not snobbery, but results from fundamental differences in raw materials and the production process.

Yet breweries make it

If it is not beer, why is hard seltzer made mainly by breweries? There are several reasons. First, seltzer is made through fermentation, so breweries already have the relevant knowledge, yeast and infrastructure: fermentation tanks, carbonation systems and bottling lines. Second, in many jurisdictions hard seltzer is subject to similar regulations and licences to beer, which makes it easier for breweries to enter this segment. Third, when craft beer met market saturation, seltzer became an attractive way for breweries to reach new consumers. For many producers it is simply a sensible diversification of the offering using existing equipment and competences. That is why, although in flavour seltzer departs from beer, institutionally and technologically it grows from the same world. It is breweries, and not distilleries or beverage producers, that became the main creators of this new trend.

Profile: light and neutral

The sensory character of hard seltzer is its hallmark and at the same time the main difference from beer. Seltzer is light, crisp, strongly carbonated and neutral, with a subtle fruity accent instead of a complex flavour. The lack of malt and hops means no bitterness, malty fullness or beer body. The advantage is low calorie content: a typical seltzer usually has around a hundred calories, few carbohydrates and very little sugar, and is often also gluten-free. These traits make it attractive for people watching their figure and avoiding heavy drinks. On the other hand, this same neutrality is sometimes a charge: for lovers of vivid flavours, seltzer can be boring and one-dimensional. It is a drink designed for refreshment and lightness, not for tasting depth. Its simplicity is at once its strength and its limitation, depending on the drinker’s expectations.

The limits of the legal definition

Hard seltzer reveals how fluid and conventional the legal boundaries of alcohol categories can be. In some legal systems, especially for tax and licensing purposes, some seltzers are made on a malt base or classified as flavoured malt beverages, so they fit within more favourable frameworks of regulations concerning beer. Others are made on a fermented sugar base and are classified differently. This shows that the definition of what is and is not beer does not always coincide with flavour or intuition, but can be a matter of regulations, taxes and the producer’s convenience. Hard seltzer balances on the edge of categories, sometimes legally treated like beer, while in flavour being something completely different. This case illustrates well that the boundaries of the world of alcohol are more conventional and flexible than they might seem, and definitions keep up with the market only with difficulty.

A market phenomenon

The rise of hard seltzer is one of the fastest successes in the history of modern alcoholic drinks. In just a few years sales in the United States shot up from the level of hundreds of millions of dollars to billions, at a lightning pace. This rapid growth was fuelled by changing consumer tastes, especially of younger generations, looking for lighter, low-calorie and convenient options. Marketing emphasising a healthy lifestyle, low calories and refreshment hit a sensitive spot in the market. Hard seltzer became a symbol of a certain style, associated with summer, the beach and carefree fun. Although the initial explosion eventually slowed somewhat, and the market stabilised, seltzer became a permanent part of the alcohol landscape. Its success also forced large and small breweries to include this category in their plans, changing the offering of shop shelves for good.

Hard seltzer versus beer

Let us set both drinks side by side, to see the differences clearly:

The table shows that, although both drinks are made through fermentation and are sometimes covered by similar regulations, their raw materials, process and flavour are fundamentally different. That is why, despite a shared production lineage, hard seltzer is a separate category, and not a variety of beer.

Criticism and place in culture

Hard seltzer has both enthusiasts and critics. Supporters value its lightness, low calorie content, convenience and refreshing character, ideal for hot weather or for people avoiding heavy drinks. Critics, especially craft beer lovers, charge it with a lack of depth, artificiality of flavour and being a product more of marketing than craft. For purists, seltzer is a symbol of simplification and commerce, far from the culture of beer. The truth is that hard seltzer and craft beer respond to different needs and do not have to compete. One is about lightness and convenience, the other about flavour and complexity. Seltzer’s place in drink culture is now well established, though it stirs emotions. It is a good example of how a new product can divide audiences and provoke a discussion about what we value in what we drink.

Is seltzer worth tasting

Is hard seltzer worth tasting at all in the sense in which beer or whisky is tasted? The answer depends on expectations. Seltzer is by design simple and neutral, so it does not offer the layers of aroma and complexity we look for in craft beer or wine. You can, however, assess its quality: the cleanliness of the base, the naturalness and balance of the fruit aroma, the level of carbonation, the absence of artificial, chemical notes. Different seltzers do indeed differ in quality of execution. If you like this style, it is worth comparing brands and flavours, noting which come across as natural and which artificial. Treat this as an assessment of refreshment and aroma quality rather than a deep tasting. Seltzer is a drink for pleasure and lightness, not contemplation, but even here a conscious choice makes sense. We write more about how beer is made in our post how beer is made.

The key points in a nutshell

Hard seltzer is carbonated water with alcohol and a fruity flavour, made through the fermentation of pure sugar, rather than mashing malt. It skips two foundations of beer, malt and hops, which is why technically and in flavour it is not beer, even though it is made mainly by breweries and is often subject to similar regulations. Its advantage is low calorie content and a neutral, light profile, which fuelled its lightning market success. The case of seltzer shows how fluid the legal boundaries of the definition of beer can be, sometimes based on taxes rather than flavour. It is a separate category, not a variety of beer. Want to compare seltzers and beers and record your impressions? Keep notes in the GustoNote app. See also our posts on how beer is made and craft versus macro beer.