Lever espresso machines, renowned for their simplicity and precision, demand a meticulous grind size to extract the most out of your beans. The right grind size not only affects the taste but also the extraction time and crema thickness, ultimately defining the espresso experience. This guide will walk you through the ideal grind size for lever espresso, key brewing parameters, a step-by-step guide, and pro tips to help you achieve the perfect shot.
Overview & Background
Lever espresso machines, like the classic La Pavoni and Jura, are manual devices that rely on the barista's skill to pull shots. Unlike automatic machines, which may vary in grind size due to their built-in burrs, lever machines require a consistent grind size for predictable results. The grind size should be fine enough to allow water to pass through quickly, but not so fine that it results in over-extraction and a bitter taste.
Key Brewing Parameters / Specs
To achieve a balanced espresso shot, consider the following parameters:
- Grind Size: Medium-Fine to Fine
- Dose: 18-20 grams
- Water Temperature: 92-96°C (197-205°F)
- Extraction Time: 20-30 seconds
Step-by-Step Guide
Here’s how to prepare the perfect lever espresso shot:
- Preheat: Preheat your lever espresso machine and portafilter by running a shot of hot water through it. This ensures that the machine is at the right temperature for brewing.
- Dose: Weigh out 18-20 grams of fresh, high-quality espresso beans.
- Grind: Use a burr grinder to grind the beans to a medium-fine to fine consistency. A good starting point is to set your grinder between a Ristretto and Espresso setting.
- Tamp: Distribute the grounds evenly in the portafilter and tamp lightly with a tamper to ensure a level surface. The tamper should apply approximately 30 pounds of pressure.
- Pull: Lock the portafilter into the machine and start the lever, pulling it down to start the brewing process. Aim for an extraction time of 20-30 seconds.
- Clean: After pulling the shot, clean the portafilter and lever to remove any remaining grounds and ensure the next shot is as perfect as the first.
Pro Tips & Common Mistakes
Here are some tips to help you perfect your lever espresso shots:
- Consistency: Always use the same grind size and tamp pressure to ensure consistency in your shots.
- Water Temperature: Ensure your water is at the correct temperature. Using water that is too hot can lead to over-extraction, while water that is too cool can result in under-extraction.
- Grind Fresh: Grind your beans just before brewing to ensure the freshest possible flavor.
Common mistakes to avoid include using an incorrect grind size (too coarse or too fine), not preheating the machine, and inconsistent tamping pressure.
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