"Dialing in" is the process of adjusting your espresso variables until you're pulling a consistently excellent shot. It sounds technical, but it's really just a feedback loop: pull a shot, taste it, make one change, pull another. Repeat until it's great.
Most beginners overcomplicate it by changing multiple things at once and losing track of what made the difference. The key is changing one variable at a time.
The three variables you control
Grind size
The most powerful lever. Finer = slower shot, more extraction. Coarser = faster shot, less extraction. This is usually the first thing to adjust.
Dose
How many grams of coffee go into the basket. More coffee = more resistance = slower flow. Start at 18g for a double and keep it fixed while you dial in grind first.
Yield
How many grams of espresso come out. A 1:2 ratio (18g in, 36g out) is the standard starting point. A shorter yield tastes richer; a longer yield tastes lighter.
Time (how many seconds the shot takes) is an outcome, not a variable you set directly. It tells you whether your grind size is in the right range. Target 25–35 seconds for a 1:2 ratio — but always stop by weight, not by time.
Where to start
Lock in your dose and yield first, then work on grind size. Here's the baseline recipe to use every time you start with a new bag of coffee or a new grind setting:
The baseline recipe
Dose: 18g in · Yield: 36g out · Target time: 25–35 seconds
Don't change the dose or yield while you're dialing in grind size. Changing two things at once makes it impossible to know which one fixed (or broke) your shot.
If you're on a new grinder or new bag, start at the finest setting your grinder allows and work coarser. It's easier to coarsen a shot that's too slow than to fine-tune one that's already running too fast.
Reading your shot
After each shot, you have two signals: what you taste and how long it took. Use both.
| What you observe | What it means | Fix |
|---|---|---|
| Shot runs in < 20 sec | Under-extracted — too fast | Grind finer |
| Shot runs in > 40 sec | Over-extracted — too slow | Grind coarser |
| Tastes sour or sharp | Under-extracted | Grind finer |
| Tastes bitter or harsh | Over-extracted | Grind coarser |
| Watery or thin body | Yield too high or grind too coarse | Reduce yield or grind finer |
| Overwhelmingly intense | Yield too low | Increase yield slightly |
| Sweet, balanced, full-bodied | Dialed in | Write it down and repeat |
How much to adjust
Grinder adjustments for espresso are small. On most grinders, moving one or two "clicks" is enough to meaningfully change shot time. Beginners often make adjustments that are too large and swing from too slow to too fast without finding the sweet spot.
The one-click rule
Change your grind by one click, pull another shot, and evaluate before changing again. If you're way off — say, your shot ran in 15 seconds — two or three clicks is fine. But once you're in the 20–40 second range, go one click at a time.
After you nail grind size
Once your shot is running in the right time window and tasting balanced, you can explore dose and yield. Try 17g in / 34g out for a slightly cleaner cup, or 36g in / 54g out for a longer, lighter style. Each change will require a small grind adjustment to maintain your target time.
Keep a shot log
A shot log sounds obsessive but it saves time. Without one, you'll find yourself rediscovering the same grind setting every time you switch coffee bags — or forgetting what worked last week.
You don't need an app. A notes file on your phone is enough. Record: coffee name and roast date, grind setting, dose, yield, time, and a one-line tasting note. After a few bags you'll start to see patterns — certain origins tend to need finer grinds, certain roast levels behave differently, and so on.
Coffee: Onyx Monarch, roasted 6/1. Grind: 8 clicks from finest. 18g in / 36g out / 28 sec. Tastes: sweet, chocolatey, slight citrus finish. Keep.
Struggling with consistency?
Check our list of the most common beginner mistakes — most dialing-in problems trace back to one of these.