Perth Coffee Exchange

Home Barista Guide

No café required.

This guide walks you through every step.

From choosing fresh beans to pulling a great shot.

Step 1

Start with fresh beans.

Everything else builds on this.

Fresh coffee tastes better. Full stop.

  • Aim for beans roasted within the last 2–4 weeks
  • Check the roast date on the bag — not the best before date
  • Avoid pre-ground if you can. Grinding fresh means more flavour, more aroma, better crema

Not sure where to start?

Our tasting boxes are a curated way to find your next favourite — a handful of carefully selected coffees, side by side, with no guesswork about what's worth trying.

Once you find one you love, you can keep getting it — or keep exploring.

That's what we're here for.

Step 2

Get the right kit.

You don't need a lot. But these things matter.

Machine

Any home espresso machine

Most use a 54mm or 58mm portafilter. Breville style machines are a great starting point.

Grinder

A burr grinder

Consistent grind size really matters. Blade grinders are unpredictable — avoid them if you can.

Scales

A set of brewing scales

Reads to 0.1g. Fits your portafilter on top. More on this below.

Water

Filtered water

Cleaner tasting espresso. Longer machine life. Or at least maintain your machine regularly.

Using a different brew method?

The same rules around fresh beans and good water apply everywhere. Here's what matters most for your setup.

Step 3

Grind for espresso.

This is where most people go wrong — and the easiest place to improve.

Espresso needs a fine grind.
Finer than filter coffee, but coarser than powder.
Like a fine beach sand.

Small adjustments make a big difference.
Move one click at a time, and taste as you go.

Shot runs too fast

Water through in under 15 seconds

Grind finer

Shot chokes the machine

Barely dripping or no flow

Grind coarser

Not sure where to start

Start medium-fine and adjust

One click at a time

Every new bag of coffee may need a small adjustment.
Roast level, freshness, and humidity all affect how it grinds.

Step 4

Weigh everything

Guessing is the enemy of consistency.

If you want to make the same great coffee twice, you need to measure what goes in and what comes out.

We recommend the Rhino 3kg brewing scale.

It fits your portafilter, reads to 0.1g, and sits neatly on your drip tray.

Quick Reference: Shot Recipe

Dose ~17g in a Breville style basket
Yield ~35–42g of liquid in the cup
Time ~28–32 seconds. Most shots land here
Grind Start a bit coarser than you think. Then go finer, or add a bit more grinds to the basket to slow things down.
Tip: With super fresh coffee. If nothing comes out or it drips slowly, go 2–3 notches coarser straight away.

Step 5

Know your basket.

Single wall or dual wall — they're not interchangeable.

Single wall basket

For fresh beans

One layer of metal. Coffee flows through naturally. This is your everyday basket.

Dual wall basket

For pre-ground or old coffee

Pressurised design that forces a crema. Good for that bag at the back of the cupboard.

It won't give you amazing coffee, but it works.

The dual wall can produce reasonable looking crema from stale coffee, but it's not a substitute for fresh beans or dialling in your grind.

Step 6

Read your extraction.

A good shot shows you exactly what's happening.

Once your dose is right and your grind is dialled in,
watch what happens underneath the basket.

Look for

Droplets everywhere

Coffee extracting from the whole base — not just one spot.

Colour shift

Dark to amber

Flow shifts from deep brown to a rusty amber as the shot develops. Not watery or spluttering.

End of shot

A spot of blonde

A little blonde in the last 1 to 2 seconds is normal and expected.

Step 7

Dial it in.

Every new bag needs a small adjustment. That's normal.

Dialling in just means adjusting until it tastes right.
Roast level, freshness, and humidity all play a part.

Tastes sour or sharp

Under-extracted

Grind finer
or increase dose

Tastes bitter or harsh

Over-extracted

Grind coarser
or reduce extraction time

Tastes weak or watery

Check both together

More dose in
and finer grind

Trust your palate. Write down what worked.
Do the same thing next time.

Step 8

Steam your milk.

Smooth and silky — not stiff and foamy.

For flat whites, lattes, and cappuccinos, you want microfoam — milk that's integrated and glossy, not a stiff cap of bubbles sitting on top.

  1. Start with cold milk — it gives you more time to work with
  2. Submerge the tip just below the surface and introduce air for around 3–10 seconds
  3. Go deeper to heat and spin the milk
  4. Pull off at around 60–65°C. When it's a bit too hot to touch the jug
  5. Give it a firm tap on the bench and a swirl before you pour — this tightens any large bubbles and makes it glossy — the consistency should be like wet paint

Step 9

Making two coffees?
Split your milk.

It changes everything about the second cup.

If you pour two coffees straight from one big jug,
the first cup gets all the foam.
The second gets almost none.

The fix is simple:
steam in a large jug, pour into a small one,
use that for cup one — then refill for cup two.

Both cups. Same foam. Every time.

Know your drinks

What's actually in the glass?

A quick guide to what you're drinking — and why it matters.

Macchiato (traditional)

Two shots. A couple of dollops of foam on top. Very strong. Three visible layers.

Long Mac topped up

The Perth version. Same base, glass filled higher with steamed milk. Halfway between a mac and a flat white.

Short Mac

One shot. Same idea. Smaller glass. Even stronger.

Try both the traditional and topped up versions side by side.

See which one you prefer.

Note: info on other common drinks coming soon!

You're ready.

Better coffee at home doesn't happen all at once.
It happens one bag at a time.

Trying something new. Finding something you love.
Working out how to make it taste its best.

That's what PCX is here for.
Explore when you want to.
Stick with what you love when you've found it.