What is Espresso? Essential Things to Know

Key Takeaways:

• Espresso Defined: Espresso is not just a type of coffee but a method of brewing that delivers concentrated, robust flavor.
• Layers Matter: Understanding the anatomy of an espresso shot—the heart, the body, and the crema—helps in appreciating its complexity.
• Brewing Essentials: Proper equipment, precise grind size, and optimal brewing conditions are crucial for consistently excellent espresso.
• Expert Insights: Real-life tips and industry expertise, including equipment recommendations and brewing techniques, enhance your coffee experience.
• Health & Flavor: Enjoy the benefits of espresso while being mindful of ingredients and preparation methods that preserve its natural qualities.

One thing I look forward to every time I get out of bed is a strong cup of espresso. The etymology of the word espresso comes from “express, fast, and pressure.”

Espresso is a coffee brewing method. It forces boiling water using high pressure through finely-ground coffee beans.

I always get a common question in the coffee shop I used to work in. Are espresso and coffee two different things? The line between espresso and coffee can indeed be a bit fuzzy.

Here’s a straight answer: Espresso is a coffee method, but coffee has many types, not just espresso.

This article will answer, “what is espresso?” and share with you what we’ve researched about it. You’ll learn the anatomy of espresso, how to brew, make, and get the most of them.

Let’s go find out!

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Anatomy of an Espresso Shot

• Definition: Espresso is a concentrated coffee brewed by forcing hot water under pressure through finely-ground coffee beans.
• Characteristics: It’s known for its thick consistency, robust flavor, and a creamy layer on top called ‘crema’.

Let’s break down the three layers of an espresso shot to understand it better. The side of an espresso shot may seem to look like it only has two layers. But in reality, it has 3: the heart, the body, and the crema.

Each layer has its distinct attributes in terms of aroma and flavor. But when combined, it reveals its true power that many coffee enthusiasts love. 

The Heart

The first layer of an espresso shot is the heart. It’s the foundation of the shot per se, delivering the initial robust flavor and density. You might notice a few speckles of coffee grounds in this layer. This typically tastes heavy.

The Body

The second layer of the shot is the “body.” It’s the biggest part of the shot, and it’s made up of three unique ingredients: soluble solids, soluble gases, and insoluble solids.

• Soluble Solids: They provide the primary taste from the coffee.

• Soluble Gases: These are responsible for the coffee’s aroma.

• Insoluble Solids: A mixture of coffee oils and cell fragments, they enhance the mouth-feel and texture.

The Crema

Crema is the easiest to recognize among the layers of an espresso shot. It is generally considered a sign of a well extracted espresso shot. Its depth and color tell you a lot about the coffee’s processing, roast, freshness, and preparation.

• Definition: Crema is the golden layer of foam on top of a shot of espresso.
• Significance: It’s a sign of a well-brewed espresso and adds to the overall flavor.
• Factors Affecting Crema: Freshness of beans, grind size, and brewing pressure.

Espresso as a Brewing Method

• It’s essential to understand that espresso refers to the brewing method, not a specific type of coffee bean or roast.
• Any coffee bean, whether light or dark roast, can be used to make espresso.

The Role of Pressure in Brewing Espresso

• Pressure is crucial in extracting the flavors and oils from the coffee grounds.
• Traditional espresso machines use 9 bars of pressure to brew espresso.

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Historical Origins

Angelo Moriondo’s First Espresso Machine

• In 1884, Angelo Moriondo patented the first espresso machine in Turin, Italy. However, it was primarily for bulk brewing.

Luigi Bezzera’s Invention

• Luigi Bezzera improved upon Moriondo’s design, creating the single-serve espresso machine in 1903.
• He introduced the use of high pressure, which became a defining characteristic of espresso brewing.

“Many modern baristas still cite Bezzera’s innovations as the turning point in espresso history, as his approach paved the way for the high-pressure systems we use today,” explains a renowned coffee expert

Commercial Availability

• After showcasing the espresso machine at the 1906 Milan Fair, it gained popularity and became more commercially available.

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Espresso vs. Coffee

Differences in Beans and Brewing Methods

• Beans: Espresso can be made from any coffee bean. The difference lies in the grind size—espresso requires a fine grind.
• Brewing: Espresso is brewed quickly under high pressure, while regular coffee is brewed slowly, often through drip or immersion methods.

Roasting Differences

• Espresso beans are typically roasted longer, resulting in a dark roast that brings out a bold and robust flavor.
• Regular coffee beans can range from light to dark roasts.

Brewing Differences

• Espresso uses about 9 bars of pressure and brews in 25-30 seconds.
• Regular coffee uses gravity (drip coffee) or immersion (French press) and takes several minutes to brew.

Caffeine Content

There’s a widespread belief that caffeine content is based on how dark or light the roast is. The truth is, so many factors affect caffeine content:

• Type of Coffee Bean

• Roast Level

• Grind Fineness

• Brew Method

• Extraction Time

It would be beneficial to consider all these factors. Thus, caffeine levels may vary from shot to shot, depending on each element.

• A single shot of espresso has about 63 milligrams of caffeine.
• In comparison, an 8-ounce cup of coffee can have 80-120 milligrams of caffeine, depending on the brewing method and bean type.

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Different Types of Espresso Shots

Do you know the difference between a single shot of espresso, a double shot, and a lungo espresso shot? If you don’t, here’s the easiest way to understand each of these shots of espresso.

Ristretto

The smallest shot is the ristretto. It’s a highly concentrated shot of espresso, typically about 0.75 oz. Ristretto uses the same amount of coffee as a regular ristretto. But its ground is usually finer to produce a smaller beverage using the same extraction timing.

Standard Single Espresso

It’s the basis of the measurement of espresso. It uses about 7 grams of brown coffee and produces a beverage of about one ounce. Standard Single Espresso can also be called a single shot or simply an espresso.

Doppio

The word “Doppio” in Italian means double. That means a doppio is double the size of a single shot of espresso. It can also be called a double shot and contains about 2 ounces of espresso. Doppio uses double the amount of ground coffee, so about 14 grams in the exact shot timing.

Lungo

Lungo means long in Italian. It’s triple the size of either a single or double espresso. That means it’s around three or six ounces (3 or 6 oz.) in volume. Unlike a doppio or double espresso, it does not use more coffee.

It also has a longer extraction time which means it tends to be more bitter. In a few places, Lungo is referred to as “long coffee,” cafe trauma,” or “crema coffee.”

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Espresso-based Beverages

There are various creative beverages based on espresso. And you might have already tried some of it:

• Espresso: The pure, undiluted shot.
• Americano: Americano is a diluted espresso. It’s perfect for those who want to enjoy less intense coffee. It’s made up of 1/3 espresso and 2/3 water and served with a cappuccino cup. 

• Cappuccino: This drink is arguably one of the most loved coffee drinks in the world. It has a single shot of espresso plus foamed milk. Its ratio may vary from cafe to cafe and would highly depend on the cup of their choice. Cups are typically 150ml to 200ml.

• Dry Cappuccino: The wet Cappuccino, which is more common, has a dry counterpart. It is prepared with extra-foamed milk and less liquid. It also has a punchier and slightly more bitter taste.
• Mocha: Are you a fan of chocolates? Then this is perfect for you! Mocha has different variations; it’s up to you how you’re going to make it. But generally, it’s espresso with steamed milk and topped with some chocolate syrup. 

• Flat White: Flat white coffees came from Australia and New Zealand. It mixes a double shot of espresso with a foamed milk in a cappuccino cup or even smaller. It has a stronger kick and a more flavorful coffee cup.

• Latte: Are you more milk, less coffee type? Then latte’s for you. Lattes are served in big cups, around 300ml. It’s mixed with a single shot of espresso and foamed milk.

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Tips for Brewing the Perfect Espresso

• Fresh Beans: Always use fresh coffee beans and grind them just before brewing.
• Consistent Grind: Invest in a good quality grinder to get a consistent fine grind.
• Optimal Pressure and Temperature: Ensure your espresso machine operates at around 9 bars of pressure and a temperature of approximately 200°F (93°C) for the best results.

Choosing the right equipment can elevate your espresso game.

• Espresso Machines: Look for models that offer temperature control and pressure stability.
• Grinders: Burr grinders are preferred for their consistency over blade grinders.
• Maintenance: Regular cleaning of your machine and grinder is essential for consistent flavor extraction.
  “A good espresso machine paired with the right grinder can make a world of difference,” notes an industry expert.

Buying Coffee Beans for Espresso

The golden rule when buying coffee grounds is: purchase fresh. But what exactly does fresh mean? After roasting coffee, its freshness declines over time. It loses its aroma, and it can also develop unpleasant flavors. They begin to oxidize and go stale.

Specialty coffee typically comes with a roast date. But if you’re buying from the supermarket, you may see a “best-before date.” Best-before dates are usually 18 to 24 months after the roast date. 

When it comes to espresso, in particular, fresher doesn’t always mean better. Fresh coffee beans contain a lot of CO2. When you try to brew them as espresso, gas comes out, disrupting the brewing process.

Coffee experts let it rest for a couple of days up to 10 days to make it a little easier to brew it for espresso.

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Common Mistakes in Espresso Preparation

Failing to Distribute Before Evenly

This is a common mistake among baristas. The coffee must fall in the filter basket evenly. This is to create an equal density inside the filter basket of the coffee. 

Reheating Milk

Another mistake baristas make in the cafe is they tend to reheat leftover milk. Bacteria can grow in milk once it’s exposed to the environment. It can also lead to having a grainy and rough texture which becomes unpleasant to drink. 

Not Using A Scale

A massive part of making great espresso is consistency. A scale allows you to get consistent inputs and outputs for every brew. 

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The Benefits of Espresso

Did you know that drinking freshly brewed coffee in the morning is excellent for your health? Research states just how beneficial a cup of espresso or coffee is in the morning. It can prevent some diseases such as the following: 

Heart Health

Caffeine affects people in different ways. Caffeine can disrupt sleep for some people. But for some people, it helps boost their energy.

According to research, the right amount of caffeine can improve cell functionality. It can lower the risk of dying from cardiovascular diseases and stroke.

Depression

Caffeinated and decaffeinated drinks have polyphenols that act as antioxidants. It helps reduce risky oxidative stress and cell inflammation. Coffee may also serve as an antidepressant in some people.

Caffeine can also increase alertness and attention, reduce anxiety, and improve mood. Moderate caffeine intake (fewer than 6 cups a day) has also been associated with a lower risk of depression and suicide.

Although coffee is beneficial to people with depression, higher amounts may be detrimental. It can increase anxiety, restlessness, and insomnia. Also, suddenly withdrawing from caffeine intake may result in stress, fatigue, headache, and low energy for a few days.

Brain Boosting

A morning dose of caffeine can quickly boost your brain receptors. It can immediately increase your alertness.

Drinking caffeine that’s roughly equal to 300 milligrams is excellent! It can increase a person’s level of concentration and mental sharpness. But drinking in excess may dull the intended effect.

Drinking a cup of espresso a day can indeed be beneficial to your health. But, you should note that adding some sweeteners can rob you of its positive effects.

For example, many busy professionals and students find that a well-timed espresso shot jump-starts their day, enhancing productivity and mood.

Frequently Asked Questions

Conclusion

Today you learned what espresso is espresso and how it works! Are you amazed yet at how beautiful and complicated brewing espresso is? Well, that’s just a glimpse of what espresso is all about. If you want to learn different techniques on how to make your coffee taste better, check our brewing tips. 

References

1. Hendon, C. H., & Colonna-Dashwood, M. (2020). Systematically Improving Espresso: Insights from Mathematical Modeling. Retrieved from Cell.com
2. Poole, R., Kennedy, O. J., Roderick, P., Fallowfield, J. A., Hayes, P. C., & Parkes, J. (2017). Consumers’ Perceptions of Coffee Health Benefits and Motives for Coffee Consumption and Purchasing. Retrieved from NCBI
3. Hendon, C. H., & Colonna-Dashwood, M. (2020). Systematically Improving Espresso: Insights from Mathematical Modeling. Retrieved from ScienceDirect
4. Poole, R., Kennedy, O. J., Roderick, P., Fallowfield, J. A., Hayes, P. C., & Parkes, J. (2017). The Impact of Caffeine and Coffee on Human Health. Retrieved from NCBI
5. Navarini, L., Nobile, E., Pinto, F., & Scholz, M. B. (2019). Espresso – an overview. Retrieved from ScienceDirect Topics