Good in the morning, sour after lunch
Your head barista dials in at 7am: 18 grams in, a set yield out, in the time window you like, and it tastes great. She finishes at 2pm. The afternoon barista finds shots running fast as the hopper empties and the room warms up, grinds a lot finer to compensate, and the shots choke. A regular who comes in twice a day mentions that the afternoon flat white was bitter.
When a new bag is opened on Thursday, nobody knows what grind setting worked for the last bag of the same coffee, so the dial-in starts from scratch and several shots go in the knock box.
Why dial-in knowledge does not travel
- Recipes, such as dose, yield and time, are known but not written down where the grinder is.
- Grind settings drift with bean age, humidity and temperature, and nobody records the changes.
- Each barista has their own habits and tastes.
- Roast dates and bag changes are not linked to the settings that worked.
- New baristas learn by copying whoever trained them.
This is a craft problem as much as a systems one. We are not going to tell you how your coffee should taste. The aim is to make what your best barista knows available to everyone on shift.
What inconsistent espresso costs
Regulars notice. A flat white that varies from shift to shift is one of the reasons people drift to another cafe, even if they never say so. Dialling in from scratch wastes coffee, sometimes several shots per bag. Sour or bitter shots that go out anyway lead to complaints or silent disappointment. And your best barista becomes the only person who can make the coffee right, which is a problem on her days off.
How we build the dial-in log
- A tablet by the grinder shows the current coffee, the bag's roast date and your recipe targets for dose, yield and time.
- Each dial-in shot can be logged with a few taps: grind setting, dose, yield, time and a quick taste note, such as sour, balanced or bitter.
- When the barista is happy, they mark the setting as the one in use, with their name and the time.
- The next barista sees the last good setting and any notes, such as grinding finer since noon, rather than starting from nothing.
- When a new bag of the same coffee is opened, the log shows the setting that worked on the last bag at a similar age.
- A simple history shows how settings change with bean age, which helps when you talk to your roaster.
| Recorded | Why it helps |
|---|---|
| Recipe targets | Everyone aims for the same shot |
| Grind setting in use | Next shift starts from a good point |
| Roast date and days since | Settings linked to bean age |
| Taste note | A shared language for adjustments |
It works with any grinder and machine, because it is simply a record. If your grinder or scales can send data, it can read that too, but that is optional.
A shift change with the log
At 2pm the afternoon barista looks at the tablet. The last good setting is there, with a note that shots ran a little fast as the hopper emptied, so go one notch finer after a refill. She pulls one shot, tastes it, marks it balanced and carries on. When the new bag goes into the hopper on Thursday, the log suggests the setting from the last bag at the same roast age, and it takes one or two shots to get there.
Does this happen on your bar?
- Espresso tastes different on different shifts.
- Only one or two baristas can dial in with confidence.
- Each new bag starts from scratch.
- Many shots are wasted during dial-in.
- Nobody records grind settings or roast dates.