Dialling in is the process of adjusting your grind until your espresso tastes balanced. It sounds technical but it is really just trial and error with a method. Once you learn it, you can fix any shot in under ten minutes.
The most common problem is people changing too many variables at once. You adjust the grind, the dose and the yield simultaneously and then you have no idea what fixed it. This method changes one thing at a time.
What 'dialled in' actually means
A dialled-in espresso tastes balanced: not sour, not bitter, with sweetness and clarity. It has body but not heaviness. When you taste it, you think 'that is coffee' rather than 'that is a science experiment'.
The three main variables are grind size, dose (how much coffee) and yield (how much liquid). We keep dose and yield consistent and only change the grind. That is the whole trick.
The basic setup
Start with a consistent dose: 18g of coffee in the basket. Your target yield is about 36g of liquid espresso out, in roughly 25-30 seconds. That is a 1:2 ratio, which works for most coffees.
Use the same beans, the same machine temperature and the same tamp pressure every time. Consistency is everything. If you change three things, you cannot tell what worked.
Taste first, adjust second. Pull a shot, taste it, then decide if you need finer or coarser. Do not adjust blindly.
Daniel Mercer, head roaster
The adjustment process
Pull a shot and taste it. If it tastes sour, sharp or thin, grind finer. If it tastes bitter, hollow or ashy, grind coarser. That is it. One variable, one direction.
Make one small adjustment at a time. Move the grind one notch finer or coarser, pull another shot, taste again. Repeat until it tastes balanced. Most people find it in two or three adjustments.
If your shot runs in under 20 seconds, grind finer. Over 35 seconds, grind coarser. Time is a good indicator but taste is the real test.
If you adjust the grind and nothing changes, check your dose. Too little coffee and the shot will be weak regardless of grind.
Common mistakes
The biggest mistake is changing the dose to fix a taste problem. If your shot is sour, do not add more coffee. Grind finer instead. Dose changes affect strength, grind changes affect extraction.
The second biggest mistake is not purging the grinder. Old grounds stuck in the chute will make your next shot taste stale. Purge a gram or two before dosing for a fresh puck.
When to re-dial
You should re-dial when you change beans, when the weather changes dramatically (humidity affects grind), or when the machine has been off for a while. A quick taste test in the morning tells you if you need to adjust.
If you buy beans from us, the bag includes grind settings for common machines. Start there and adjust based on taste. Our baristas are also happy to help if you get stuck.
Dial-in essentials
- Start at 18g in, 36g out, in 25–30 seconds as a baseline
- Sour and thin? Grind finer or dose up. Bitter and hollow? Grind coarser
- Change one thing at a time — grind OR dose, never both
- Weigh everything; eyeballing is how bad shots happen
Common questions about espresso dialing
Taste it. If it is sour, go finer. If it is bitter, go coarser. Time is a secondary indicator: aim for 25-30 seconds for a double shot. If it runs fast and tastes sour, finer. Slow and bitter, coarser.
You really should get one. A $20 scale is the single best investment for home espresso. Without it, you are guessing at dose and yield, which makes dialing in nearly impossible.
No. Different coffees need different grind settings. A light roast usually needs finer than a dark roast. When you change beans, expect to re-dial. It takes about 10 minutes once you know how.
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