Hey coffee friends, ever wonder what makes espresso espresso? From its bold flavor to its syrupy texture, it’s a different animal from your regular cup of drip coffee, and the reasons why come down to simple physics.
Pull a shot, grab a chair, and join us as we answer all your espresso questions: what makes it different from other brewing methods, what high-pressure extraction actually does, and how those factors create its unique flavor, acidity, and body.
What Makes Espresso, Espresso?
People often think espresso is a specific type of coffee bean, but in actuality, any coffee bean can be made into espresso. Why? Because it’s neither a type of bean nor even a specific roast; rather, it’s a type of brewing method.
Making espresso requires a particular machine that creates a rapid, high-pressure, concentrated extraction. The word "espresso" comes from the Latin verb exprimere, meaning "to press out" or "to squeeze out," referencing the water that’s forced through the fine grounds under pressure.
It's All About Extraction
Extraction is the process of pulling soluble compounds out of ground coffee using water, and it’s what makes this coffee beverage so unique. An espresso machine forces a small amount of nearly boiling hot water through finely ground, tightly packed coffee under pressure.
The combination of high pressure, hot water, and a fine grind creates just the right amount of resistance for a rapid, concentrated brew. If the grind is too coarse, you’ll get channeling and a weak, uneven cup.
Pressure Changes Everything
Unlike drip and other coffee brewing methods that rely on gravity, espresso relies on force, pushing hot water through the coffee at about 9 bars of pressure (roughly six to nine times what the atmosphere exerts on you right now), combined with a fine grind, for a rapid extraction that takes only about 25 to 30 seconds per shot.
But those 9 bars do more than speed things up. They also force more insoluble substances, like the natural oils found in coffee and minute, microscopic coffee particles, into the cup rather than leaving them behind in a paper filter, producing a thick, flavorful shot.
That same force is also responsible for one of our favorite features of espresso, the crema: the thick layer of delicious golden foam that forms on top.
Why the Taste of Espresso Is Amplified
The flavors of espresso taste amplified because it’s a concentrated brew, with a 1:2 dry coffee to liquid output ratio, or for every 18g of ground beans, you would get 36g of liquid output. That concentration intensifies the coffee tasting notes as well as the perceived acidity, sweetness, and bitterness all at once. The high-pressure emulsification of natural oils, carbon dioxide gas, and tiny coffee particles can also lock in additional flavors and aromas, further heightening the taste.
Because espresso concentrates flavors, roasters have traditionally built their blends around dark roasts, which have a lower perceived acidity because longer roasting breaks down the bean’s natural acids into other flavor compounds, mellowing the brightness you’d taste in a lighter roast. Using a dark roast in a concentrated shot makes it easier to find a pleasant balance, keeping your shot from tasting too sour or sharp. That’s likely why so many people assume espresso is less acidic than drip coffee: the darker roast makes it taste less acidic, even if the actual acid content isn’t necessarily lower.
We designed our certified organic, Fair Trade Italian Espresso Roast with balance in mind. It blends dark roasted coffees from different origins with a touch of quality Robusta from our farmer partners at the Prasanna Ganapathi Farmer’s Foundation in India to produce a well-balanced shot that’s not too acidic tasting or too bitter, with plenty of flavor and a rich, golden crema.
From Our Roastery
Pull our Italian Espresso Roast
These high-grown Central American beans (and some robusta) provide a rich, hearty flavor, analogous to a good burgundy. Pungent acidity and a robust, full body.
Shop Italian Espresso RoastUnderstanding Body: Why Espresso Feels So Rich
You’ve probably noticed espresso feels thicker and more substantial on your tongue than a cup of drip coffee — that’s what coffee folks call body.
So what is body, exactly? It’s the mouthfeel that comes from the dissolved solids, oils, and fine particles suspended in your cup. Drip coffee typically has a lighter body, and light roasts can sometimes feel almost tea-like in consistency. Espresso tends to have a thick, syrupy body with a smooth mouthfeel due to the additional dissolved and suspended particles and natural oils, which espresso machines retain more than a drip machine does, thanks to a metal basket instead of a paper filter.
A 2025 chemistry study on coffee oil emulsification found that when the extreme pressures used in the machine force the natural coffee oils to emulsify into highly concentrated microscopic droplets, the complex sugars and proteins further stabilize them. The result is a rich, syrupy mouthfeel with a stronger, but not unpleasant, aftertaste—that coating you feel on your tongue.
While other brewing methods can also produce a heavier body, this particular effect only occurs under high pressures, which is one reason espresso feels richer than drip coffee. The concentration plays a role too — if you don’t dilute your shot with water or milk, it will naturally feel more substantial than a drip coffee diluted with more water.
How Roast Level Shapes Espresso
Traditionally, the best coffee beans for espresso were considered to be dark-roasted Arabica beans, combined with a touch of Robusta to boost the crema.
This preference is because dark roasts tend to have a more muted acidity than lighter roasts, depending on the origin, which prevents the perceived acidity from getting too concentrated and producing sour shots. Roasting longer to create a dark roast also breaks down more of the bean’s structure, making its flavors easier to dissolve. When the high-pressure water hits the finely ground dark-roasted coffee, the grounds easily yield that thick, syrupy body with rich notes of chocolate and smoky flavors these beverages are typically known for.
The world of espresso has changed recently. Nowadays, people are experimenting with medium- and light-roasted coffees as a way to concentrate the flavors from the origin, the coffee’s terroir. Our shade-grown beans from these regions pick up distinct character from where they’re grown, and these lighter roasts can produce shots with more flavors from the origin, like notes reminiscent of blueberries, citrus, florals, or stone fruits, that you won’t often get from a dark roast, which tends to be dominated by more roast-forward notes.
Lighter roasts are more dense and harder to extract under pressure, making them prone to underextraction and sour tastes. While more challenging, this doesn’t mean it can’t be done; it just may require more precise burr grinders, higher water temperatures, or brew ratios in the 1:2.5 to 1:3 range to coax out the bean’s natural sweetness.
Frequently Asked Questions
Why Does My Espresso Taste Horrible?
Espresso isn’t a particularly forgiving brew method, so shots can easily end up underextracted (sour flavors) or overextracted (bitter flavors). To get the shot you want, start with a fine grind and good-tasting water, and take time to learn your machine, develop your barista skills, and experiment with different beans to find what works best.
How Do I Get My Espresso To Taste Stronger?
If you want your espresso to taste stronger, try adding more coffee. Espresso typically has a ratio of 1:2, or one part dry ground coffee to 2 parts liquid output. If your machine makes 36g shots, use at least 18g of ground coffee. Also, use a fine grind, not a medium grind size, to avoid underextraction.
Taste the Difference Pressure Makes With Our Italian Espresso Roast
If you’re new to exploring the world of espresso, you have an exciting journey ahead as you learn your machine, develop your barista skills, and explore different beans, origins, and roasts, tasting the different flavors they produce.
As a worker-owned cooperative and certified B Corp, we build long-term, direct relationships with farmer cooperatives, and using beans sourced that way can improve your shots whether you’re a beginner or an experienced barista. Our certified organic, Fair Trade Italian Espresso Roast is a great blend to help ensure you get delicious shots with relative ease.
