# Dual-phase extraction, an advanced brewing technique worth trying

> Splitting a brew into two phases by particle size sounds fussy. For a serious home setup, it is a genuine way to get more out of the same beans.

By Joey Krosch. Published 2024-07-22, updated 2026-08-17.

Standard brewing treats every particle in your grind the same way, but
different particle sizes extract at genuinely different rates. Fine
particles give up their flavour compounds fast, coarser particles release
theirs more slowly. Dual-phase extraction is a way of brewing that
accounts for that difference directly, rather than accepting whatever
average result a single uniform grind produces.

## The idea

Rather than brewing your whole dose at one grind setting and one
temperature, you split the brew into two targeted phases: one for the
finer particles in your grind, one for the coarser ones, each brewed
under slightly different conditions suited to how fast that fraction
actually extracts.

> **Who this is actually for:**
> This is a technique for people who already have their basic brewing
> dialled in and want to push further, not a starting point. If you haven't
> nailed a consistent single-phase pour-over yet, that's worth mastering
> first.

## The two phases

**Phase one, coarser grounds.** Brew at around 94°C, roughly a 1:10
ratio, for about 100 seconds. This phase targets the brighter acids,
florals and initial sweetness that coarser particles tend to hold.

**Phase two, fine particles.** Using particles under roughly 300
microns, brew at a slightly lower 85°C to 88°C, closer to a 1:7 ratio.
This phase is aimed at body, complexity and the balanced sweetness that
fine particles contribute when they're not extracted alongside the
coarser fraction.

## What you need to actually separate particle sizes

This is the part that makes dual-phase brewing a genuinely advanced
technique rather than a quick trick: you need a way to sift your grounds
into size fractions before brewing. Options range from a high-end grinder
with built-in sifting, to a dedicated sifting tool like a Kruve sifter, to
a simple fine mesh sieve at the budget end. All three work, they just
trade convenience for cost.

## Adjusting for your beans

**Washed coffees** generally suit the standard split described above:
94°C first phase at 1:10, 86°C second phase.

**Naturally processed coffees** tend to do better with a slightly lower
92°C starting temperature and a more even split between the two phases,
since naturals often carry more delicate, easily-overextracted compounds
that benefit from gentler early treatment.

## Is it worth the extra steps?

For a casual morning cup, no, this is genuinely more effort than most
people want on a weekday. For someone who already enjoys dialling in a
single-origin coffee and wants to hear more of what's actually in the
bean, it's a legitimate way to get there, treating the grind as more than
one uniform mass is the whole point.

## The takeaway

Dual-phase extraction isn't a shortcut or a gimmick, it's a genuinely
more precise way of brewing that asks more of your setup and your time in
exchange for pulling more distinct character out of the same coffee.
Worth trying once you've got the fundamentals solid and want to see what
a more deliberate approach actually reveals.