☕ Why do we grind coffee?

Grinding: a daily gesture that hides a universe of aromas

Every morning, millions of people repeat the same gesture.

👨👩👧👦 At home, you open the coffee jar, scoop out a few spoonfuls of scented powder, pour it into the moka pot, and place it on the stove. A familiar, almost automatic gesture, with the scent of ritual.

👨🍳 At the bar, however, coffee professionals—baristas—carefully fill the filter holder, measuring out freshly ground coffee from the grinder to the gram. They tampe it precisely, start the extraction, and watch with expert eyes the crema that forms.

Whether it's the hearth of a house or the counter of a bar, there is one thing that unites them all : coffee is ground before being prepared .
But why?
If roasted coffee is already aromatic, fragrant, and full of aromas… why do we have to grind it to obtain the drink?

🔬 Inside the grain: a surprising structure

To understand this, you have to look beyond the surface.

A roasted coffee bean may appear compact and inert, but inside it is a veritable treasure trove of aromas . If we were to observe it under an electron microscope, we would see a network of microcells , like a natural sponge.
Each of these tiny rooms contains:

• aromatic oils , responsible for body and creaminess

• volatile gases , which give fragrance and lightness

• soluble compounds , which define taste, acidity, sweetness

All these elements are trapped in the solid structure of the grain.
Without breaking it, they could not be freed .

🧂 Why grind? A question of surface area

When we grind coffee, we break its natural barrier.
We create thousands of tiny fragments : and on each fragment, a new surface is exposed to water. 💧

Just like with pepper or salt, the larger the surface area, the more easily the aromatic substances spread .
This is the principle of extraction: hot water passes through the powder, dissolves the oils and volatile gases, and transports them into the cup .

This is why coffee is not prepared with whole beans, but only after grinding.

🔥 Heat + water = magic (if everything is calibrated)

Heat also comes into play in the preparation process 🔥.
Whether it's the stovetop at home or the brew group of an espresso machine, temperature is the element that “activates” extraction .

But be careful: if the coffee is too fine, the water has difficulty passing through → the result is bitter, over-extracted.
If it is too coarse, the water passes through too quickly → the taste will be watery, underextracted.

Each method requires its own perfect grinding :

• ☕ Espresso : very fine grind

• 🔲 Moka : medium-fine

• 🫖 Filter or Chemex : average

• 🧊 Cold brew : very large

Baristas know it well: adjusting the grind every day is essential to maintaining consistent quality. Does the climate change? Does the humidity change? The grinder setting changes too.

⏳ Time does not forgive aromas

Once ground, coffee begins to lose freshness .
The more volatile aromas begin to evaporate after a few minutes. Oxygen compromises their complexity. Humidity alters their consistency.
That's why true enthusiasts (and baristas) prefer to grind on the spot .

When this is not possible, conservation comes into play: airtight bags, aroma-preserving valves, protective atmosphere packaging like those of Caffè Di Bernardo , designed to keep the original aroma intact until the moment of preparation .

👨🍳 The fundamental role of the bartender

In the professional world, grinding is one of the key skills of the barista .
Coffee is adjusted based on:

• type of mixture

• environmental conditions

• type of machine

• desired extraction time

The difference between a good espresso and a mediocre one often depends on a few seconds of extraction … and a wheel turned just right on the grinder.

What for some is “a brown powder”, for a bartender is a living matter , which changes and must be listened to.

❤️ A simple gesture, but one that changes everything

Grinding coffee is not just a technical necessity .
It is the step that transforms a bean into a cup full of emotions .

Whether you do it at home, while everyone is sleeping, or at the bar, among customers and fragrances, you are doing something special :
you are releasing the aroma, revealing the story of a plant, of a land, of a roast.

That's why, every time you press that button or turn that crank, you're participating in a ritual that's both ancient and modern .

☕ By Bernardo Caffè
Ground with respect, roasted with art, enjoyed with passion.