Two Burrs, One Language

The Grinder Series

On conical and flat geometries — and the quiet philosophy behind each cup.

There's a conversation that happens at the counter more than any other. Someone leans in, points at the grinder, and asks: "Flat or conical — which one's better?" I always take a breath before I answer, because the honest reply is that neither is better. They just speak different dialects of the same language.

The conical burr is the older voice. Coffee passes through a cone nested inside a ring, tumbling a longer path before it lands in your portafilter. That journey matters — it produces what grind scientists call a bimodal distribution: a mix of fines and slightly coarser particles living together in the same dose. In the cup, those fines act like tiny flavour sponges, soaking up body and sweetness, while the coarser pieces carry aromatics through. The result is something you feel before you taste — syrupy, velvety, cosy. The kind of espresso that settles into you like a familiar armchair.

The flat burr is a newer ambition. Two parallel discs face each other and shear the bean in a single, decisive plane. There is almost no variation in particle size — grinders call this a unimodal distribution — and that uniformity changes everything about how water moves through the bed. Each grain extracts at roughly the same rate, pulling flavour in clean, separate waves. The cup becomes a kind of high-definition portrait: tea-like, delicate, and bright, with each origin note arriving with its own distinct voice. If the conical whispers warmth, the flat speaks in crystal.

Both designs today are electric, precise, and built to honour the bean — not to overpower it. Modern engineering has made reliability a given on both sides; what's left is purely a question of intention. What feeling are you chasing in the morning?

Some mornings I want texture, roundness, that hug-in-a-cup quality. On those days, conical. Other mornings I want to audit the terroir of a washed Ethiopian — to taste the altitude and the process separately. On those days, flat. The grinder doesn't decide the ritual. You do.