How to Grind Coffee Beans for Espresso? | Dial In Your Shot

Getting the grind right is the single biggest step between bitter, sour, or truly excellent espresso. The target is a fine, consistent grind that slows water just enough to extract flavor under pressure, without choking the machine. You’ll dial in by taste and shot timing, making small adjustments until it clicks.

The Espresso Grind Size You’re Aiming For

Espresso needs a fine grind—think table salt or fine sand. Many guides narrow the practical sweet spot to roughly 200–400 microns. If it looks powdery like flour, it’s likely too fine.

Because espresso brews under pressure, the grind must slow water flow without stalling it. A balanced double shot typically uses an 18–20g dose, pulls 36–42g of liquid, and runs 25–30 seconds. Use these three numbers as your starting benchmark, then adjust from taste.

How to Grind: Step-by-Step

Start with a burr grinder—both Sage and Breville identify burr grinding as the method for consistent espresso. Blade grinders produce uneven particles that cause channeling and sour shots.

1. Set the grinder to fine. Breville notes fine grind is “perfect for Turkish coffee and espresso.” Sage advises starting with the size recommended for your brew method and adjusting from there.
2. Weigh your beans. Start at 18–20g for a double shot.
3. Grind in small batches. Grind only what you need and use short bursts if your equipment heats up, since overheating alters flavor.

Sweet Maria’s recommends using extraction time as your feedback signal: if the shot runs too fast, grind finer; if it drips slowly or chokes, grind coarser. Adjust in small steps rather than big jumps.

Dialing In and Common Mistakes

Espresso grind settings are grinder-specific—the numbers on one machine won’t match another. Re-test whenever you change beans, roast level, or even humidity. Lighter roasts often need finer dialing; darker roasts extract more easily slightly coarser.

• Grinding too coarse gives a fast, weak, under-extracted shot. Go finer.
• Grinding too fine chokes the machine and over-extracts. Go coarser.
• Skipping the scale—grind size alone can’t fix a mismatched dose or yield.
• Skipping cleanup—old oils and residue ruin flavor. Keep the grinder clean.

For a machine recommendation, our tested roundup of the best bean grinder for espresso covers models that hold their settings shot after shot. Adjusting your grind by taste is the real skill, but starting with dependable equipment removes a variable.

FAQs

Can I use a blade grinder for espresso?

You can, but results will be inconsistent. Blade grinders chop beans unevenly, producing both powder and chunks, which leads to bitter and sour flavors in the same cup. If you’re serious about espresso, a burr grinder is worth the investment—it crushes beans to a uniform size for even extraction.

Why is my espresso shot running too fast?

A shot that finishes in under 20 seconds is usually ground too coarse. The water flows through quickly without extracting enough flavor, producing a thin, sour shot. Move your grinder one or two clicks finer and pull another shot. Keep adjusting until you approach the 25–30 second benchmark.

What does over-extracted espresso taste like?

Over-extracted espresso tastes bitter, harsh, and dry, often with a burnt or ashy aftertaste. It happens when the grind is too fine, water passes too slowly, or the yield is too high. Grind coarser or reduce your yield slightly to bring back sweetness and balance.