Robusta espresso is a bold and rich coffee, often characterized by its robust and earthy flavors, making it a preferred choice for those who enjoy a strong and full-bodied espresso shot. While it can be more challenging to brew due to its higher caffeine content and lower acidity compared to Arabica beans, mastering the technique can lead to a truly satisfying cup. The key to a great robusta espresso lies in proper grind size and water temperature control.
Overview & Background
Robusta coffee beans, scientifically known as Coffea canephora, are grown in warmer climates around the world. They are typically more bitter and have a higher caffeine content than Arabica beans, which are often preferred for their sweeter and more complex flavors. Robusta beans are known for their ability to maintain their flavor profile even when roasted darker, making them a staple in espresso blends.
Key Brewing Parameters / Specs
- Bean Type: Robusta
- Grind Size: Fine to medium-fine
- Water Temperature: 90°C to 96°C (194°F to 205°F)
- Grind Weight: 18-20 grams
- Water Weight: 30-32 grams
- Extraction Time: 25-30 seconds
Step-by-Step Guide
- Grind Your Beans: Use a burr grinder to grind your robusta beans to a fine to medium-fine consistency. This will help ensure a more even extraction.
- Dose Your Coffee: Measure out 18-20 grams of ground coffee into your portafilter.
- Tamp Your Coffee: Tamp the grounds firmly with a tamper to create a level and compact bed. This will help ensure even water distribution during brewing.
- Pull Your Shot: Use a double-shot espresso machine to pull your shot. Start by pouring a small amount of water to wet the grounds and let it sit for about 30 seconds to allow the gases to escape. Then, continue pouring the remaining water in a steady stream, aiming to finish within 25-30 seconds.
Pro Tips & Common Mistakes
- Pro Tip 1: Adjust your grind size based on the specific espresso machine you are using. A finer grind may be necessary for a more robust extraction.
- Pro Tip 2: Monitor the temperature of your water. A slight increase or decrease in water temperature can significantly affect the flavor of your espresso.
- Common Mistake 1: Over-extracting your shot can result in a bitter and harsh taste. Aim to extract within the recommended time frame.
- Common Mistake 2: Not tamping your coffee properly can lead to uneven extraction and a weak shot. Use the right pressure and technique to achieve a level and compact bed.
Gear worth owning
Recommended gear for this recipe.
Two practical upgrades that make this method easier to repeat. We may earn a commission if you buy through these links.
Affiliate disclosure: prices and availability change. BrewVibe Lab is reader-supported and independently edited.