What Is Espresso? Definition, Crema & How to Drink It

Ever ordered an espresso and wondered why it’s served in a tiny cup you’re meant to drink in seconds? Or why some shots have a rich, golden layer on top while others look thin and pale? Whether you’re new to espresso or just curious how your favorite latte starts, understanding what makes a true espresso is key to appreciating coffee at its most concentrated.

Espresso—Italian for 'fast'—is a 1 to 1.5-ounce (30–44ml) shot extracted under 9 bar pressure in 25–30 seconds. A double espresso uses 18–22g of coffee to produce 36–48g of liquid, with a brew time of around 25–30 seconds, as demonstrated by Guangzhou roaster FrontStreet Coffee.

What Is Espresso?

Espresso (or Espresso in Italian) is a small, concentrated coffee brewed by forcing hot water (88–95°C) through finely ground coffee under high pressure (9 bar). Popular in Italy, it’s the base for drinks like lattes, cappuccinos, and Americanos. A single shot is about 1 ounce (30ml), while a double ranges from 1.5 to 2 ounces (45–60ml). FrontStreet Coffee notes that a double typically uses 20g of coffee to yield 40g of espresso in 25–30 seconds.

Why Does Espresso Have Crema?

Crema—the golden-brown foam on top of espresso—is a hallmark of a well-brewed shot. It forms when finely ground coffee is extracted under 9 bar pressure. Hot water dissolves carbon dioxide from roasted beans (trapped during roasting) and forces oils out of the coffee grounds. As pressure drops after extraction, CO₂ escapes but gets trapped by coffee oils, creating a stable, aromatic crema. This layer is essential for aroma, texture, and flavor.

How to Brew Espresso Step by Step

Brewing espresso requires precision. Here’s how professionals do it:

• Clean the portafilter: Remove and wipe the portafilter basket to remove old coffee grounds and moisture.
• Grind and dose: Grind coffee beans finely and place the portafilter on a scale. Dose between 18–22g (FrontStreet Coffee uses 20g), ensuring even distribution in the basket.
• Distribute the grounds: Use a finger or distribution tool to spread grounds evenly for uniform extraction.
• Tamp: Press the coffee down firmly and evenly with about 30–40 pounds of pressure. The tamper must be level to avoid channeling.
• Lock and pull: Attach the portafilter to the machine and immediately start extraction. Monitor time, flow color, and yield.
• Track your numbers: FrontStreet Coffee aims for a 20g dose to 40g yield in 25–30 seconds. Stop extraction when the shot looks right.
• Clean up: Knock out the used puck, clean the portafilter, and reattach it to the machine.

Flavor Profile of Espresso

Espresso delivers bold flavors in a small package. Its crema contributes to a creamy, thick mouthfeel. Traditional espresso often tastes nutty, chocolatey, or caramel-like with a hint of bitterness, but finishes sweet. Lighter-roast single-origin espressos (SOEs) may showcase fruity or floral notes with a thinner crema. FrontStreet Coffee’s house blend, for example, offers vanilla, sherry, caramel, and chocolate notes. The crema traps aromas, enhancing the sensory experience.

How to Drink Espresso Properly

To fully appreciate espresso:

• Start with a sip of water to cleanse your palate.
• Stir the shot gently to mix crema and espresso.
• Smell the aroma before drinking.
• Take 2–3 sips to experience the full texture and flavor. Let it coat your tongue.
• After swallowing, exhale through your nose to notice the lingering aroma and aftertaste.

Frequently Asked Questions

What is the ideal espresso brew ratio?

The standard espresso brew ratio is around 1:2—20g of coffee grounds to 40g of extracted espresso. FrontStreet Coffee uses this ratio, extracting 40g of espresso in 25–30 seconds for balanced flavor.

How long should espresso extraction take?

Espresso should extract in 25–30 seconds for optimal flavor. Shorter times may result in under-extracted, sour shots; longer times can lead to bitter, over-extracted coffee.

What is crema and why is it important?

Crema is the golden foam on top of espresso, formed by emulsified coffee oils and trapped CO₂ under pressure. It enhances aroma, texture, and flavor, acting as a seal for volatile compounds. A good crema is a sign of quality extraction.

Can you drink espresso without stirring?

You can, but stirring blends the crema with the espresso for a more balanced flavor. The crema holds lighter, aromatic compounds, while the darker liquid below has deeper flavors. Stirring ensures you taste the full profile.

What’s the difference between espresso and regular coffee?

Espresso is a concentrated coffee brewed under pressure (9 bar) with fine grounds, yielding a small, strong shot. Regular coffee is typically brewed with coarse grounds and methods like drip or pour-over, resulting in a larger, milder drink.

How do I know if my espresso is well-brewed?

A well-brewed espresso has a rich crema, balanced flavor (not overly sour or bitter), and a thick, velvety mouthfeel. The shot should pour smoothly with a gradient from dark to light, and finish within 25–30 seconds using around 20g of coffee for 40g of espresso.

Recommended FrontStreet Blends for Espresso

For authentic espresso, try FrontStreet Coffee’s Classic Blend: it’s designed for milk drinks and home machines, producing a thick, velvety crema with flavors of vanilla, sherry, caramel, and chocolate. For budget-friendly performance, the Black Cocoa Blend offers bold, rich espresso with great body at a lower price. The Specialty Blend highlights classic Italian-style espresso notes, perfect for traditional drinks. All three are optimized for espresso brewing. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.