How to Use an Espresso Machine: Step-by-Step Extraction Guide

Whether you're dialing in your morning shot or prepping for a competition, the way you dose and tamp your espresso puck makes all the difference in extraction quality. Many home baristas overlook critical steps like leveling the coffee bed or controlling tamping pressure, leading to uneven extractions and poor crema. If you've ever wondered why your shots sometimes channel or taste under-extracted, the issue likely starts before the water even hits the coffee.

To pull a balanced espresso shot, start by dosing around 7 grams for a single shot and 14 grams for a double, level the coffee with your fingers (not a spoon or lid), then tamp twice — once at 10 kg, then again at 20 kg. Clean the portafilter thoroughly after each use to protect your machine.

Why Dosing and Leveling Matter

Getting the right amount of coffee into your portafilter is the first and most crucial step. The ideal dose for a single shot is 7 grams, and for a double, it’s 14 grams. These amounts ensure the coffee bed is neither too thin nor overcrowded, both of which affect extraction consistency.

Never place the portafilter directly on the machine’s tray (also called the “dump box” or “chute”) while dosing. Instead, hold it just above the grinder’s outlet to catch the grounds in a small mound, like a gentle hill. This helps you control the dose without spilling or overfilling.

How to Level the Coffee Bed

Once you’ve dosed the coffee into the portafilter, the next step is to create a flat, even surface. This ensures water flows through the coffee evenly during extraction.

You can use either the lid of the portafilter or your finger to level the grounds. While using the lid is common, many competitive baristas prefer using just their finger. Though it may seem less hygienic, it allows you to feel the grind texture — giving you a tactile sense of the coffee’s particle size, which builds valuable experience. Just make sure your hands are clean.

The goal is a uniformly level coffee bed, no matter if you’re pulling a single or double shot. Consistency here sets the foundation for everything that follows.

The Two-Step Tamping Process

Tamping is where you apply pressure to the coffee puck to create resistance for the water. But it’s not just about smashing the coffee — it’s about doing it correctly, in two measured steps.

First, use a tamper to press down on the coffee with 10 kilograms (about 22 pounds) of force. Rotate the tamper slightly as you press to ensure an even surface. Then, take the small end of your tamper or a knock box tool and gently tap the edge of the portafilter to dislodge any loose grounds stuck to the sides. Do this quickly and with minimal movement.

Next, apply a firmer tamp: 20 kilograms (about 44 pounds) of pressure. This final press ensures the coffee is uniformly compacted and ready for optimal water flow. The two-step approach — light tamp, distribution tap, then firm tamp — helps prevent channeling and improves shot balance.

Cleaning the Portafilter After Use

This step is frequently overlooked, but it’s essential for protecting your espresso machine. After you’ve pulled your shot, always clean the outside of the portafilter thoroughly.

Any coffee grounds left on the exterior, especially near the rim, can scratch or degrade the rubber gasket inside your machine’s group head. Over time, this leads to leaks, inconsistent pressure, and expensive repairs. Make it a habit to brush off or wipe the portafilter after every use.

Frequently Asked Questions

How much coffee should I use for a single or double espresso shot?

Use 7 grams of coffee for a single shot and 14 grams for a double. These doses are standard in the specialty coffee industry and help ensure proper extraction and crema formation.

Should I use my finger or a tool to level coffee in the portafilter?

You can use either your finger or the portafilter lid to level the coffee. Using your finger is preferred by many baristas because it gives tactile feedback on the grind size, though it may be considered less hygienic. The key is achieving a flat, even coffee bed.

Why tamp espresso twice, and what are the correct pressures?

Tamp twice: first at 10 kilograms (light tamp) to form the base, then tap the edges lightly to remove loose grounds, and finally tamp again at 20 kilograms (firm tamp) for proper resistance. This two-step method ensures even extraction and reduces the risk of channeling.

What happens if I don’t clean the portafilter after use?

Failing to clean the portafilter, especially the exterior, can damage the rubber gasket in your espresso machine’s group head. Coffee grounds can scratch the seal, leading to leaks, pressure loss, and eventual machine breakdown. Always wipe it clean after each shot.

Can I skip leveling the coffee bed before tamping?

No, leveling is essential. An uneven coffee bed causes water to find the path of least resistance, resulting in uneven extraction, sour or bitter flavors, and poor crema. Always level before tamping to ensure an even flow.

Recommended FrontStreet Blends for Espresso

For espresso, FrontStreet Coffee’s Classic Blend delivers outstanding crema and a rich, rounded body — ideal for lattes, cappuccinos, and straight shots. It’s based on a traditional Mamba-style profile, making it forgiving even for beginner baristas. For those prioritizing value, the Black Cocoa Blend offers bold flavor and smooth body at a lower price point, perfect for high-volume shops. The Commercial Blend is another solid workhorse option with cost-effective performance and decent crema. All three blends are optimized for espresso extraction. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.