How to Dial In Your Espresso (A Simple Guide for Home Baristas)

It's Simpler Than You Think

If you've recently bought a home espresso machine, you've probably experienced the frustration of pulling a shot that tastes nothing like what your local café produces. Too bitter, too sour, too watery, too intense — it can feel like there are a hundred variables working against you.

The good news is that dialling in espresso is not nearly as complicated as the internet makes it seem. There are really only three things you need to control: dose, yield, and time. Adjust those, and you can turn almost any espresso from mediocre to genuinely good. Here's how.

What Does "Dialling In" Actually Mean?

Dialling in is the process of adjusting your grind size, dose, and extraction to get the best possible flavour from a particular coffee. Every time you open a new bag of beans, you'll need to dial in again — different coffees (and even the same coffee at different stages of freshness) behave differently under pressure.

Think of it like tuning an instrument. You're not rebuilding the whole thing — you're making small adjustments until it sounds right. With espresso, you're making small adjustments until it tastes right.

The Three Numbers That Matter

Professional baristas track three core variables when dialling in. You don't need fancy equipment to do this at home — just a set of kitchen scales (ideally accurate to 0.1g) and a timer (your phone works fine).

1. Dose (How Much Coffee Goes In)

The dose is the weight of ground coffee you put into your portafilter basket. For most home espresso baskets, this is somewhere between 18g and 20g. Check your basket size — most standard double baskets are designed for 18g, while larger "precision" baskets can handle 20g or more.

Pick a dose and stick with it. Consistency is key. If you change your dose every time, you're introducing an extra variable that makes it harder to isolate what's actually affecting the flavour. Start with 18g if you're not sure.

2. Yield (How Much Liquid Comes Out)

The yield is the weight of the espresso in your cup. Place your cup on the scales, tare to zero, and weigh the liquid as it comes out. For a standard espresso, you're aiming for roughly double the dose — so if you put 18g in, you want about 36g out. This is called a 1:2 ratio.

A 1:2 ratio is a great starting point for most coffees. If you want a more intense, concentrated shot (a ristretto), aim for a 1:1.5 ratio. If you prefer a longer, lighter shot, try 1:2.5. But start at 1:2 and adjust from there based on taste.

3. Time (How Long the Shot Takes)

Time your shot from the moment you start the pump to the moment you stop it. For a well-extracted espresso at a 1:2 ratio, you're aiming for roughly 25–30 seconds. This is where grind size comes in — it's the main lever you'll use to control extraction time.

The Grind Size Adjustment

Here's where the real dialling in happens. Your grind size controls how fast or slow the water passes through the coffee puck. It's the single most important variable in espresso.

If your shot runs too fast (finishing in under 20 seconds), the grind is too coarse. Water is passing through the coffee without extracting enough flavour. The result will taste sour, thin, and under-developed. Grind finer — just a small notch on your grinder — and try again.

If your shot runs too slow (taking more than 35 seconds), the grind is too fine. Water can't pass through the tightly packed coffee quickly enough, and over-extraction occurs. The result will taste bitter, harsh, and astringent. Grind coarser — again, just a small adjustment — and try again.

If your shot runs in 25–30 seconds and tastes balanced — sweet, with some pleasant acidity and no harsh bitterness — congratulations, you're dialled in. Don't change anything until you open a new bag.

A Step-by-Step Process

Here's a simple workflow you can follow every time you need to dial in a new coffee:

Step 1: Weigh your dose (18g is a good starting point) and distribute it evenly in the portafilter. Tamp firmly and level.

Step 2: Place your cup on the scales, tare to zero, and start the shot. Time it on your phone.

Step 3: Stop the shot when you reach your target yield (36g for a 1:2 ratio). Check the time.

Step 4: Taste the shot. Is it sour and thin? Grind finer. Bitter and harsh? Grind coarser. Balanced and sweet? You're done.

Step 5: Repeat steps 1–4, adjusting the grind by small increments each time, until you hit the sweet spot.

Most people get there within three to five attempts. It gets faster with practice.

Common Mistakes to Avoid

Changing too many things at once. If you adjust the grind, the dose, and the yield all at the same time, you won't know which change made the difference. Change one variable at a time — usually grind size — and keep everything else constant.

Not using scales. Eyeballing your dose or yield introduces inconsistency that makes dialling in nearly impossible. A cheap set of kitchen scales that reads to 0.1g costs under $30 and makes a massive difference. It's the single best investment you can make for your home espresso.

Ignoring freshness. Coffee changes as it ages. Beans are typically at their best for espresso between 7 and 28 days after roasting. Very fresh beans (under a week) can produce a lot of crema and be hard to dial in. Stale beans (over a month) will taste flat regardless of your technique. Using freshly roasted beans from a good roaster gives you the best chance of a great shot.

Overthinking it. The internet is full of espresso enthusiasts debating water chemistry, pre-infusion profiles, and puck preparation techniques. That's all interesting, but it's advanced stuff. For now, focus on dose, yield, and time. Those three things will get you 90% of the way to great espresso. The remaining 10% is for later.

Which Beans Work Best for Espresso?

Almost any quality coffee can make a good espresso, but some are more forgiving than others — especially when you're still learning. Beans with a medium roast profile, chocolate or nut notes, and lower acidity tend to be the most approachable for home espresso. They're more tolerant of small mistakes in technique and produce a balanced, sweet shot across a wider range of extraction parameters.

Our Brazil Peaberry is a great example — it's smooth, chocolatey, and performs beautifully as espresso without demanding absolute precision. Once you've got your technique down, try something with more acidity and complexity, like our Colombia Tolima, which rewards careful dialling in with bright, fruity shots.

Start Simple, Get Better

Dialling in espresso is a skill, and like any skill, it improves with practice. Don't expect perfection on your first attempt. The goal is to understand the relationship between grind size, dose, yield, and time — and to use that understanding to consistently pull shots you enjoy.

Start with 18g in, 36g out, in 25–30 seconds. Adjust the grind until the time is right, then adjust by taste. That's the whole process.

Get espresso-ready beans and start dialling in at home.