Grinding
Burr Grinder vs Blade Grinder for Espresso
This is one of the few genuinely settled debates in home espresso: burr grinders are the standard, and blade grinders are not recommended for espresso specifically.
How each works
A burr grinder crushes beans between two burrs set to a specific gap, producing a consistent particle size. A blade grinder chops beans with a spinning blade, producing a wide range of particle sizes with no real size control — closer to how a food processor works than a precision tool.
Why that difference matters for espresso specifically
Espresso needs both a fine and highly consistent grind to build proper resistance against the pump's pressure. A blade grinder's inconsistent, uncontrollable particle size makes a proper, even espresso extraction essentially impossible — some particles will be reduced to dust while others remain coarse chunks, extracting at wildly different rates within the same shot.
What this looks like in the cup
Unlike a burr grinder's adjustment dial, a blade grinder gives you only grind time as a control, and even a longer grind time does not converge on a consistent size — it just shifts the average while the spread stays wide. The resulting shots are typically both bitter (from the over-fine dust) and sour (from the under-extracted chunks) at once, a signature combination that is difficult to fix through technique alone.
The practical takeaway
Every grinder reviewed on this site, and every grinder worth considering for espresso, is a burr grinder. A blade grinder is fine for drip coffee in a pinch, but budget for even an entry burr grinder like the Baratza Encore ESP if espresso is the actual goal.
If you already own a blade grinder
A blade grinder you already own is still useful for drip coffee or French press, where particle-size consistency matters far less — it just is not a reasonable substitute for espresso specifically. Rather than throwing it out, keep it for other brew methods and budget separately for a dedicated burr grinder if espresso is genuinely the goal, instead of trying to make the blade grinder work through longer grind times or repeated passes.
Why this is not just brand snobbery
It is tempting to assume "burr grinders are recommended" is just enthusiast preference rather than a real mechanical constraint — but the espresso method itself (forcing pressurized water through a tightly packed, fine, even bed of grounds) does not work at all with a blade grinder's output, regardless of price or brand. This is one of the few places in home espresso where the "settled debate" framing is genuinely accurate rather than marketing.