Whether you’re a budding barista or a home coffee lover in Australia, understanding the basics of espresso grind and dose is essential for pulling consistently great shots. Espresso is a precise craft where grind size and coffee dose directly influence flavour, extraction, and crema. This guide breaks down these concepts in a warm, accessible way, helping you get the most from your espresso machine without fuss or snobbery.
What Is Espresso Grind and Why Does It Matter?
Grind size refers to how coarse or fine your coffee beans are ground. For espresso, the grind needs to be fine enough to create resistance when hot water is forced through the coffee puck, but not so fine that water struggles to flow.
Think of grind size like sandpaper grit: too coarse feels rough and lets water rush through, resulting in under-extraction — weak, sour, or watery coffee. Too fine can clog the filter, causing over-extraction — bitter, harsh, or burnt flavours.
The ideal espresso grind is typically between powder and table salt texture, but this can vary depending on your machine, coffee type, and freshness.
Common Espresso Grind Types
- Coarse: Granular, similar to sea salt. Too coarse for espresso; usually used for French press.
- Medium: Like sand; generally for drip or pour-over.
- Fine: Powdery, slightly gritty – the sweet spot for espresso.
- Extra fine: Flour-like; sometimes used for Turkish coffee.
What Is Dose and How Does It Affect Your Espresso?
Dose is the weight of ground coffee you use for a single espresso shot, usually measured in grams. The dose impacts the strength and balance of your espresso. Too little coffee means weak extraction; too much can lead to bitter or over-extracted shots.
Most home espresso recipes recommend a dose between 18 and 22 grams for a double shot, but this can vary by blend and machine. For example, Drizzly’s Velvet Reserve suggests a dose of 20 – 21 grams with an extraction volume of 25 – 30 ml.
Why Dose Consistency Is Key
Consistent dosing means each shot starts with the same amount of coffee, making it easier to dial in your grind and extraction time. This improves repeatability and flavour stability.
Practical Steps to Dial In Your Espresso Grind and Dose
- Start with recommended dose: Weigh your coffee beans before grinding using a kitchen scale. Aim for 18–21 grams for a double shot.
- Set your grinder: Choose a fine grind setting. Use a burr grinder for uniform particle size, essential for espresso.
- Pull a test shot: Time your extraction aiming for 25–30 seconds for a double shot. Watch the flow: it should resemble warm honey dripping steadily.
- Taste and observe: If the shot tastes sour or watery, grind finer or increase dose slightly. If bitter or harsh, grind coarser or reduce dose.
- Adjust and repeat: Small tweaks in grind size (one notch at a time) and dose (0.5 g increments) can make a big difference.
Common Mistakes and How to Troubleshoot
- Ignoring freshness: Use freshly roasted coffee beans like Drizzly’s Golden Crest for best results. Stale beans affect flavour and extraction.
- Inconsistent dosing: Avoid eyeballing doses; always weigh your coffee for consistent shots.
- Wrong grind size: Too coarse or fine grind causes under or over-extraction. Adjust grind size gradually and test.
- Not cleaning equipment: Old coffee oils and residue can impact taste. Clean your grinder and espresso machine regularly.
- Neglecting tamping pressure: Apply even 15-20 kg pressure when tamping to create a uniform coffee bed.
Helpful Terms to Know
Extraction
The process of dissolving coffee solubles into water. Ideal extraction balances sweetness, acidity, and bitterness.
Crema
The golden, foamy layer on top of espresso, indicating a good shot.
Tamping
Compressing ground coffee in the portafilter to create resistance for water flow.
Dialling In
Adjusting grind size and dose to optimise espresso flavour and extraction time.
Concise Takeaway
Getting your espresso grind and dose right is all about balance and consistency. Use a quality burr grinder to achieve a fine, even grind. Weigh your coffee dose carefully—around 18 to 21 grams for a double shot is a good target. Pull your shot aiming for a 25 to 30 second extraction and adjust grind size or dose if the taste is off. Keep your equipment clean and use fresh beans for the best flavour. With a bit of practice and patience, your home espresso will be a delicious reflection of your care and skill.
Frequently Asked Questions
What happens if my espresso shot pulls too fast?
If your shot pulls too quickly (under 20 seconds), your grind is probably too coarse or your dose too low. Try grinding finer or increasing your dose slightly to slow the water flow and improve extraction.
How do I know if my espresso is under-extracted?
Under-extracted espresso often tastes sour, sharp, or weak, and the crema might be pale. Typically, a grind that’s too coarse or a dose that’s too small causes this. Adjust by grinding finer or increasing the dose.
Can I use the same grind size for different espresso blends?
Not always. Different blends, like Drizzly’s Velvet Reserve or Golden Crest, may require slight grind adjustments due to bean roast level and density. Always dial in each new coffee.
Why is dosing by weight better than by volume?
Weight measurement is more accurate because coffee bean size and density vary. Measuring by volume (e.g., scoops) can lead to inconsistent shots, while weighing ensures the same amount of coffee every time.
How often should I clean my grinder and espresso machine?
Clean your grinder burrs and espresso machine group heads weekly to remove oils and residue. This keeps flavours fresh and prevents clogging, ensuring consistent extraction.