Beginner's Guide to Espresso Coffee: Essential Knowledge and Standard Extraction Tutorial

As coffee becomes part of everyday life, more and more enthusiasts are buying their own equipment. In the third wave of specialty coffee, home pour-over gear keeps selling, and it is now common for coffee lovers to keep an espresso machine on the kitchen counter. FrontStreet Coffee has noticed, though, that while many people own an espresso machine, far fewer understand how to pull a proper shot - how much coffee to dose, how long extraction should take, and how the variables fit together. This article walks through the essentials of extracting espresso at home.

What Coffee Beans Should Be Used for Espresso?

Espresso pulled on an espresso machine normally wears a layer of crema on top, and crema is a key part of a proper shot. Carbon dioxide is the main source of crema, with a smaller contribution from emulsified coffee oils, which is why FrontStreet Coffee recommends beans roasted within days or weeks - not beans that have been sitting on the shelf for months.

The longer beans are stored, the more of the carbon dioxide produced during roasting they lose. Grinding breaks open the cell walls that hold carbon dioxide and other volatile compounds, releasing them; carbon dioxide and aroma then dissipate steadily and oxidation sets in quickly. For the best flavor and crema, grind and tamp immediately before brewing, and use only fresh, freshly ground coffee.

Beans used for espresso are generally espresso blends. Every bean has its own strengths and weaknesses: if a bean yields too little crema through the machine, it can be complemented with a bean rich in crema; if a bean pulls too acidic, too bitter, or too sweet, a complementary bean can be blended in to reach the target flavor.

FrontStreet Coffee currently uses its own house-roasted beans for its blend. This blend carries a comforting aroma like warm sunshine and a flavor profile that catches the eye. It is built primarily on FrontStreet Coffee's Honduras Sherry beans, with their rich fermented wine aroma, complemented by the acidity of FrontStreet Coffee Yirgacheffe Red Cherry for a rich, aromatic cup. FrontStreet Coffee named the result "FrontStreet Coffee Sunflower Warm Sun Blend Espresso Bean."

What Kind of Coffee Grinder Should Be Used for Espresso?

For standard espresso, FrontStreet Coffee recommends a burr grinder. Burr grinders produce more uniform particles than blade grinders and let you control particle size through the setting. Whether manual or electric, choose a burr grinder.

Not every burr grinder suits espresso. Many conical or flat burr grinders are designed for coarser styles such as pour-over, siphon, French press, or moka pot, while ghost tooth burr grinders are mainly built for pour-over and siphon. Espresso calls for finer grounds, because the greater surface area raises extraction yield - the share of all soluble solids in the grounds that ends up dissolved in the cup - and those grinders may not reach the fineness a standard espresso shot requires. When choosing a conical or flat burr grinder, confirm that it is rated for espresso.

How Should You Adjust Grind Size for Espresso?

If you are unsure how to judge coarseness, you can use FrontStreet Coffee's reference. FrontStreet Coffee's grind size standard sieve pass rates run as follows:

Cold drip > Pour-over, Siphon 80% > Moka pot, American drip 75-80% > Cupping 70-75% > French press 65-70%.

Standard espresso requires pressure during brewing. On semi-automatic or fully automatic machines, the machine controls that pressure. On a general semi-automatic machine, dial in to a fineness where roughly 16-18 grams of coffee yields about 32-36 grams of espresso in about 20-30 seconds. On a lever machine, where you control the pressure yourself, adjust the grind so that brewing meets 6-9 BAR of resistance and completes within 20-30 seconds. Whenever you change beans, you may need to readjust coarseness to hit the ideal pressure and time.

How to Distribute and Tamp Coffee Grounds

When loading grounds into the portafilter basket, use a sound distribution method to remove clumps and air pockets, which prevents channeling during brewing - for example, the WDT (Weiss Distribution Technique) or lightly tapping the portafilter on a soft pad. Before tamping, first level the grounds in the basket. This avoids uneven extraction of the whole puck, because if the bed is not level, tamping compresses one side more than the other and the puck extracts unevenly. Tamping also does not require great force: its purpose is to level the coffee bed and remove the remaining air pockets.

The Coffee-to-Water Ratio for Espresso

The espresso ratio is the ratio of dose to yield. FrontStreet Coffee most commonly uses 20 grams of coffee grounds to produce 40 grams of espresso, a ratio of approximately 1:2. FrontStreet Coffee adjusts this as needed; espresso ratios vary widely with personal preference and regional style, from 1:1 to 1:4. Italians give the different concentrations different names, such as Ristretto, Normale, and Lungo.

During extraction, the higher the ratio, the more liquid ends up in the cup. Extraction rate rises, but the coffee tastes weaker. The most common range is about 1:2 to 1:3. Different concentrations of espresso change in different ways once water, milk, milk foam, or cocoa is added. FrontStreet Coffee currently uses a latte ratio of 1:6.5, meaning 40 grams of espresso mixed with 260 grams of steamed milk.

FrontStreet Coffee believes that to make a standard espresso, beyond the beans themselves, you also need to control grind size, distribution, tamping technique, and ratio, along with pressure, temperature, and time. Espresso is generally extracted at 6-9 BAR. Pressure is not the only factor that shapes extraction rate, and higher pressure does not automatically mean better-tasting espresso.

Espresso Extraction Temperature Control

Making espresso relies on water temperature, pressure, and time to dissolve soluble solids out of the grounds. If the water is too hot or the time too long, the shot over-extracts and tastes bitter. If the water is too cool or the time too short, it under-extracts and tastes weak and acidic. Espresso is generally extracted at about 91-96 degrees Celsius, but darker roasts should use lower temperatures, since dark-roasted beans already tend toward bitterness, while lighter roasts should use higher temperatures, since they naturally tend toward acidity.

Every espresso machine, whether fully automatic, semi-automatic, or manual, also needs to be preheated to working temperature. Water temperature has a large effect on taste, so FrontStreet Coffee suggests experimenting with brew temperature and with preheating time and method until you reach the cup you personally want.

Once these parameters are clear, you can start pulling shots yourself. If the puck comes out wet or muddy, don't worry: as long as extraction was even, that will not affect the quality of your espresso. Below, FrontStreet Coffee shares its own method and parameters for making a latte.

FrontStreet Coffee's Latte Ratios and Method

FrontStreet Coffee's espresso method is 20 grams of coffee grounds to extract 40 grams of espresso liquid in 27 seconds, which serves as the base for a latte.

FrontStreet Coffee uses the Fiema E98 espresso machine with the following extraction parameters:

Pressure: 9 bar
Temperature: 90.5~96 degrees Celsius
Time: 20~30 seconds
Coffee-to-water ratio: 1:1.7~1:2
Dose: 12g (single shot espresso) 20g (double shot espresso)
Extraction amount: 20ml (single) 40ml (double)

With the espresso pulled, it's time to steam the milk. FrontStreet Coffee's simple approach: pour half a cup of milk into the steel pitcher, hold the steam wand perpendicular to the milk in the center or at the edge of the pitcher, and let the steam tip just touch the milk's surface. Open the steam to half power and keep the pitcher still. Close it slowly once the milk reaches 50 degrees, and fully at 60 degrees, so the final temperature settles at 66 degrees. This produces a good milk foam.

Then combine the espresso and the milk foam. If you can pour latte art, create whatever pattern you like; if you can't, that's fine too - latte art has no effect on the taste of the latte.

FrontStreet Coffee Recommendation

When you are choosing beans to run through an espresso machine at home, FrontStreet Brazil Queen Estate is one of the most forgiving places to start. Its low acidity and balanced cup bring out dense nut and cocoa aromas with clear caramel sweetness, and because it holds up equally well in a pour-over, a moka pot, or an espresso machine, it works as a daily base for americanos and lattes alike.

For a bolder single-origin shot, FrontStreet PWN Golden Mandheling is a classic choice. Roasted dark, it carries very little acidity and a long, thick body, with herbal and dark chocolate notes layered over a faint earthy undertone - a natural fit for anyone who likes a heavy, bitter-leaning espresso.

If you want an espresso that stays balanced from the first sip to the last, FrontStreet Jamaica Blue Mountain No. 1 is the one to try. It avoids the sharp fruit acidity of some African coffees and the heavy bitterness of a deep roast, instead holding acidity, sweetness, bitterness, and aroma in careful balance, with cream, caramel, chocolate, nut, honey and a light fruit complexity. Soft and round on entry, generous sweetness in the middle, and a clean, long finish.