Opening a new bag of coffee is one of the moments when even a familiar espresso setup can suddenly feel unfamiliar.
The grind setting that worked yesterday may produce a very different shot. The coffee may need a different beverage yield, respond differently to temperature, or simply taste better with a slightly different approach.
That's normal. The goal isn't to find a universal espresso recipe for every bag — it's to establish a sensible starting point, taste the result and make deliberate adjustments without wasting coffee.
Here's a repeatable process you can use whenever you open a new bag.
Before You Touch the Grinder: Read the Bag
Start with the information the roaster has already given you.
Look for:
- Roast date
- Roast style or intended brewing method
- Origin
- Processing method
- Tasting notes
- Any suggested espresso recipe supplied by the roaster
A roaster's suggested recipe isn't a guarantee that the coffee will behave identically on your equipment, but it can provide a useful starting point.
And don't treat the tasting notes as flavours you are required to find. They're better used as clues about the general character the roaster experienced from the coffee.
Step 1: Choose a Sensible Starting Recipe
If the roaster provides an espresso recipe, you can start there and adapt it to your equipment.
If not, use a recipe that already works reasonably well with your machine, basket and grinder.
For example, if you normally use an 18g dose with your basket, keeping that dose initially gives you one less variable to worry about.
The important thing isn't whether your starting recipe matches somebody else's numbers. It's having a repeatable baseline from which you can make controlled changes.
Step 2: Clear Out the Previous Coffee
If there's still old coffee retained in your grinder, the first grounds you use may contain a mixture of the previous beans and the new ones.
How much retention occurs depends on the grinder.
After changing coffee, use enough of the new beans to clear any obvious remnants of the previous coffee according to the way your particular grinder behaves. There's no need to waste an arbitrary quantity simply for the sake of it.
Step 3: Prepare the First Shot Carefully
For the first comparison to be useful, control the things you can control.
- Weigh the coffee dose.
- Distribute the grounds consistently.
- Tamp using your normal repeatable technique.
- Place your cup on a scale.
- Record the beverage yield.
- Record the approximate extraction time.
Time is useful diagnostic information, but it isn't the definition of a good espresso.
A shot doesn't automatically become good because it finishes within a particular number of seconds, and it doesn't automatically become bad because it falls outside somebody else's preferred range.
Step 4: Taste the Espresso
This is the most important step.
Before moving the grinder simply because the shot ran faster or slower than expected, taste it.
Ask yourself:
- Is the acidity pleasant or aggressively sharp?
- Can you detect sweetness?
- Is there unpleasant bitterness or dryness?
- Does the espresso feel thin, balanced or excessively heavy?
- Does the finish disappear quickly or linger pleasantly?
- Do any of the coffee's expected characteristics come through?
You don't need sophisticated tasting vocabulary. “Sweeter than the previous shot”, “less dry” or “too sharp for me” are all useful observations.
Step 5: Check the Flow as Well as the Flavour
Taste tells you where you want to go. Flow can provide clues about what happened.
If espresso races through the puck, stalls, sprays or behaves inconsistently, don't assume grind size is the only possible cause.
Also consider:
- Distribution
- Puck preparation
- Basket dose
- Grinder consistency
- Channelling
If your preparation was obviously inconsistent, repeating the shot carefully may tell you more than immediately changing the grinder.
Step 6: Make One Deliberate Change
Once you have tasted the first shot, decide what you actually want the next shot to do differently.
Grind size is often a useful first adjustment because it affects both resistance and extraction behaviour, but it isn't a universal answer to every flavour problem.
You might instead decide to change:
- Grind size
- Beverage yield
- Temperature, if your machine allows useful control
- Dose, where there is a practical reason to change it
Change one important variable at a time wherever practical.
If you simultaneously change grind, dose, yield and temperature, you may make a better espresso — but you won't know which adjustment produced the improvement.
Step 7: Compare Shot Two With Shot One
Don't judge the second espresso in isolation.
Ask a much easier question:
Did that change move the coffee in the direction I wanted?
For example:
- Is it sweeter?
- Is the sharpness more pleasant?
- Has the drying finish reduced?
- Does it have more clarity?
- Is the strength closer to what you enjoy?
This comparative approach is much easier than trying to decide whether each shot meets some imaginary definition of “perfect espresso”.
Step 8: Repeat Until Further Changes Stop Helping
Continue making controlled adjustments and comparing the results.
You don't need to chase perfection indefinitely.
If you reach a recipe that tastes balanced and enjoyable to you, that's a perfectly sensible place to stop.
There isn't a fixed number of shots that dialling in should take. Sometimes your starting point will be close immediately. Other coffees may require more experimentation.
Step 9: Record the Recipe
Once you're happy, record enough information to reproduce the result.
A simple note might include:
- Coffee and roaster
- Roast date
- Date opened
- Grinder setting
- Dose
- Beverage yield
- Approximate extraction time
- Temperature setting, if relevant
- A short tasting note
You don't need a complicated spreadsheet. The purpose is simply to give yourself a useful reference tomorrow — and the next time you buy a similar coffee.
Don't Assume the Recipe Is Finished Forever
Dialling in isn't necessarily a one-time event at the beginning of a bag.
Coffee changes after roasting and after the bag is opened. Environmental conditions, grinder behaviour and other variables can also affect how espresso flows.
You may therefore find that a recipe that worked well earlier needs a small adjustment later.
If the espresso suddenly tastes different, don't automatically assume something has gone wrong with your equipment. Taste it, observe what changed and make another controlled adjustment if necessary.
Should You Always Rest Coffee Before Making Espresso?
Freshly roasted coffee releases carbon dioxide over time, and the stage after roasting can influence how a coffee behaves during brewing.
But there isn't one universal rule that every coffee must rest for exactly 7, 10 or 14 days before you use it.
The appropriate approach depends on factors including the coffee, roast style, packaging and the roaster's own recommendations.
If the roaster provides guidance about resting the coffee, that's a sensible place to start. Otherwise, pay attention to how the coffee behaves and tastes rather than waiting for an arbitrary date on the calendar.
A Simple New-Bag Dial-In Routine
If you want to remember the entire process, reduce it to six actions:
- READ — check the coffee and any roaster guidance.
- BREW — make a controlled first espresso.
- TASTE — decide what you want to improve.
- CHANGE — adjust one meaningful variable.
- COMPARE — decide whether the second shot improved.
- RECORD — save the recipe once you're happy.
That process is far more transferable than memorising one grind setting, extraction time or brew ratio.
Want to Understand Dialling In More Deeply?
This article is designed specifically for the moment you open a new bag of beans.
If you're still learning how the espresso variables themselves work, start with How to Dial In Espresso: A Practical Step-by-Step Guide. It explains the broader process of using grind, dose, beverage yield, time and taste together.
For a more structured approach to espresso, milk and home coffee skills, Home Barista Masterclass 2026 is a 96-page practical guide built around understanding, practising, tasting, adjusting, comparing and recording your results.