Mastering the lever espresso technique allows for a unique brewing experience that emphasizes the crema's texture and the balance of flavors in each shot. This method requires precise control over water pressure, making it a fascinating challenge for both beginners and experienced baristas alike.
Overview & Background
The lever espresso machine was first introduced in the 1920s, with notable models like the Gaggia Classica and the La Marzocco Leva. These machines use a lever to manually control the pressure, offering baristas unparalleled control over the brewing process. The lever espresso technique is favored for its ability to produce a rich, velvety crema and a well-balanced espresso shot.
Key Brewing Parameters / Specs
- Water Temperature: 90°C - 96°C (194°F - 205°F)
- Dose of Coffee: 15-18 grams
- Grind Size: Fine to medium-fine
- Pull Time: 25-30 seconds
- Pressure: 9-12 bar
Step-by-Step Guide
- Preheat: Preheat the group head and portafilter by running a small amount of water through it.
- Dose and Tamp: Measure out your dose of coffee and distribute it evenly in the portafilter. Tamp the grounds with a tamper to a depth of approximately 1-2 mm.
- Lock the Portafilter: Lock the portafilter into the group head.
- Pull the Lever: Start the lever pull by depressing it slowly and steadily. As the lever reaches the end of its travel, it should lock into place, allowing you to maintain the pressure.
- Adjust Pressure: If the flow of espresso is too slow or too fast, adjust the pressure by slightly pulling the lever further or releasing it.
- Finish the Shot: Continue pulling the lever until the desired amount of espresso is extracted, typically around 30-35 grams.
Pro Tips & Common Mistakes
- Consistent Grind: Use a burr grinder to achieve a consistent fine to medium-fine grind size.
- Correct Tamping: Ensure even and firm tamping to avoid channeling and uneven extraction.
- Water Temperature: Maintain the water temperature within the specified range to extract flavors properly.
- Avoid Over-Extraction: Keep the pull time under 30 seconds to prevent bitterness.
- Regular Maintenance: Clean and descale your machine regularly to ensure optimal performance.
Gear worth owning
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