Why grinding fresh matters so much
Coffee starts losing flavour within minutes of being ground. When you grind beans, you dramatically increase their surface area - which means aromatics and volatile compounds escape into the air almost immediately. Pre-ground coffee has been doing exactly that since it was packed.
Grinding right before brewing is the single highest-impact habit you can build. Even a modest burr grinder used fresh will outperform expensive pre-ground coffee from a bag that’s been sitting open on a shelf.
Burr grinders vs blade grinders
Not all grinders are created equal. There are two types, and the difference is significant.
Burr Grinder
Two abrasive surfaces (burrs) crush beans to a consistent size. You set the distance between the burrs to choose your grind size.
The only real choice for good coffee.
Blade Grinder
A spinning blade chops beans like a blender. You control coarseness by how long you run it.
Fine for spices. Not recommended for coffee.
Grind size by brew method
Grind size is arguably the most important variable in brewing. Too fine and water can’t flow properly - you over-extract and get bitterness. Too coarse and water races through - you under-extract and get sourness. Match your grind to your method:
| Brew Method | Grind Size | Reference |
|---|---|---|
| Espresso | Extra fine | Fine table salt |
| Moka Pot | Fine | Fine sea salt |
| AeroPress | Medium-fine | Regular table salt |
| Pour-Over / V60 | Medium | Sand |
| Drip Machine | Medium | Sand |
| French Press | Coarse | Coarse sea salt |
| Cold Brew | Extra coarse | Rough breadcrumbs |
What kind of burr grinder should you get?
Burr grinders come in two forms - hand (manual) and electric. Both work. Which is right for you depends on budget and how much you value convenience.
You turn a handle to grind. Takes 1 - 2 minutes per dose. Quiet, compact, great for travel. Entry-level options like the Timemore C2 or 1Zpresso Q2 punch well above their price.
Best for: Budget-conscious brewers, travellers, pour-over enthusiasts.
Flat parallel burrs produce a consistent grind with excellent clarity. Popular in specialty coffee for espresso and filter. Brands like Baratza Encore and Eureka are well-regarded.
Best for: Home baristas who want convenience and consistency.
A cone-shaped burr inside a ring. Quieter than flat burr, often with lower retention (less old coffee stuck in the grinder). Very common across all price points.
Best for: General home use, espresso and filter coffee.
Tips for better grinding
- 1.Weigh your beans before grinding, not after. A 0.1g scale makes a real difference to consistency.
- 2.Purge your grinder before each session. Run a small amount of beans through and discard them - this clears out stale grounds from last time.
- 3.Clean your grinder every 2 - 4 weeks. Old coffee oils turn rancid and affect flavour. Most grinders can be cleared with a dry brush or grinder cleaning tablets.
- 4.Never grind wet or oily beans through a fine grinder - they clog burrs quickly. Extra-dark, oily roasts can cause issues with high-precision espresso grinders.
- 5.If your espresso pulls fast and tastes sour, grind finer. If it pulls slow and tastes bitter, grind coarser. The grinder is your biggest flavour tool.
Fresh beans are half the equation.
Find freshly roasted whole beans from specialty roasters - the other half of a great grind.