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Dial-In Coach: 3 Shots to Sweet Espresso
New bag of beans? Don't waste half of it guessing. Pull a shot, tell the coach how long it ran and what it tasted like, and get the one change to make for the next shot. Three shots, zero guesswork.
0Set your starting recipe
Every dial-in starts from the same safe baseline. Lock these in and don't touch the dose again until the coach says otherwise.
📓 This session's log
Saved on this device only — nothing leaves your browser.
| Shot | Dose | Time | Yield | Taste | Change for next |
|---|---|---|---|---|---|
| No shots logged yet. | |||||
The three rules this coach runs on
1️⃣ One variable at a time
Grind, yield, temperature — pick ONE per shot. Change two and you'll never know which one fixed it. The coach always prescribes exactly one change.
2️⃣ Grind is the steering wheel
Grind size controls flow speed, and flow speed controls extraction. Roughly 80% of dial-in problems are solved with the grinder alone. Yield and temperature are fine-tuning.
3️⃣ Taste beats the timer
25–30 seconds is a guide, not a law. A 24-second shot that tastes sweet beats a 28-second shot that tastes sour. The numbers get you close; your tongue makes the call.
🛑 Know when to stop
Three shots is the budget. If shot 3 still isn't sweet, pick the best-tasting of the three, lock that recipe in, and enjoy the bag. Chasing perfection burns coffee and patience.
Dial-in FAQ
Why only change one thing per shot?
Because dialing in is an experiment, and experiments need a control. If you grind finer AND lengthen the shot and it tastes better, you don't know which change did it — so you can't repeat it next time. One change per shot keeps every result meaningful.
Should I ever change the dose?
Rarely, and not while learning. Dose changes how the puck resists water, which changes everything downstream. Lock your dose (18g is the standard double), dial in with grind and yield, and only touch dose later for basket-size reasons.
My shot 1 already tastes great — now what?
Lock it in! Write down the recipe (dose, yield, time, grind setting) in the shot journal. Dialing in isn't a ritual you owe the coffee gods — if it's sweet, you're done.
The same beans tasted different today. Did I mess up?
Probably not. Beans change as they age off roast, humidity shifts grind behavior, and your grinder retains a little old coffee. Small day-to-day drift is normal — one notch on the grinder usually brings it back. That's exactly what this coach is for.
What does "sour AND bitter" actually mean?
It usually means channeling: water found a weak path through the puck, so some grounds over-extracted (bitter) while the rest under-extracted (sour). The fix isn't the grinder — it's puck prep. Stir the grounds (WDT), level, and tamp straight. The puck prep checklist walks through it.
New to the vocabulary? The shot types guide explains ratios, the brew ratio calculator gives exact yield targets, and diagnose my shot troubleshoots a single bad shot in detail.
The paid shortcut — totally optional
Want the whole process explained with pictures?
This tool is free, and it always will be. If you'd also like the full walkthrough — your first shot from start to finish, a flowchart for when shots taste off, milk basics, and a cheat sheet for the fridge — that's the 15-page Quick-Start Guide. It's $6, it downloads instantly, and there's nothing else to buy afterward.