Specialty coffee, acidic, and commercial coffee, bitter?

One of the most common reactions from those who taste specialty coffee for the first time is surprise. Especially in Portugal, where for decades coffee has been associated with "intense", heavily roasted, and bitter flavors, a lighter, more citrusy, or fruity espresso can seem very strange at first. Many people immediately describe it as “acidic.”

But is specialty coffee really more acidic? And why does commercial coffee tend to taste more bitter?

The answer lies mainly in the roast, the quality of the raw material (green coffee), and how each sector views coffee.

Coffee, which comes from a fruit, naturally already contains dozens of acidic compounds. This is neither a defect nor something exclusive to specialty coffee. Just like in wine, fruit, or chocolate, acidity is part of the product's natural complexity. The coffee bean contains organic acids such as citric, malic, phosphoric, and tartaric acids, responsible for sensations that can evoke citrus, green apple, red berries, or a certain freshness in the cup. The Specialty Coffee Association states that these compounds contribute directly to the clarity, vibrancy, and aromatic perception of coffee. (sca.coffee)

What changes between commercial coffee and specialty coffee is mainly how these compounds are treated during roasting.

A large part of commercial coffee is roasted much darker. There are several reasons for this. A more developed roast creates a profile that is easy to reproduce on a large scale. Additionally, it helps to standardize coffees of variable quality and to hide defects in the green bean. When coffee is roasted longer and at higher temperatures, many of the compounds associated with acidity and fruit degrade. At the same time, flavors linked to very developed caramel, smoke, roast, and bitterness increase.

That is why many traditional coffees have that heavier, more bitter profile that so many people in Portugal still associate with the “true taste of coffee.”

In specialty coffee, the goal is usually different. Instead of standardizing the flavor, the aim is to preserve the natural characteristics of the origin. A washed Ethiopia might present floral and citrus notes. A Kenya might evoke red berries. A Colombia might show ripe fruit and more evident sweetness. For these differences to survive the roast, many roasters opt for lighter or medium profiles, which preserve more aromatic compounds and more of the coffee's natural acidity.

This does not mean that specialty coffee is automatically “acidic” in the negative sense of the word. There is an important difference between pleasant acidity and unpleasant sourness. An underextracted or poorly roasted coffee can taste aggressively acidic, sour, or unbalanced. And this also happens in specialty coffee. For some years, part of the industry ended up associating extremely light roasts with higher quality, creating coffees that were difficult for many people to drink. It's a frequent discussion in international coffee communities, and even within specialty coffee itself, there are criticisms of excessively acidic and unbalanced profiles. (reddit.com)

At the same time, bitterness is not necessarily a defect. The problem arises when it completely dominates the cup. Many commercial coffees use higher percentages of robusta, a naturally more bitter and "intense" species. Adding this to dark roasts and often aggressive extractions, the result is that short, very roasted, and persistent espresso that is part of the old coffee culture in several Southern European countries, including Portugal.

In practice, the biggest difference between commercial coffee and specialty coffee is perhaps philosophical. Commercial coffee seeks consistency and price above all. Specialty coffee seeks expression. One tries to ensure that the flavor is always the same and cheap. The other tries to show that different coffees can taste radically different from each other.

Interestingly, taste also changes significantly with exposure. Many people who initially find specialty coffee “too acidic” later begin to better distinguish sweetness, fruit, and balance.

In the end, there is no universal answer as to which is “better.” But understanding why specialty coffee tends to seem more acidic, and commercial coffee more bitter, helps to taste coffee more consciously. Often, what we call “acidic” is simply a coffee where the quality of origin can still shine through, combined with a good roast.