The Espresso Dial-In Process
A step-by-step framework for dialing in your espresso grinder to pull the perfect shot.
Pulling a great shot of espresso is a balancing act. You are balancing dose (how much coffee), yield (how much liquid espresso), and time (how long it takes).
When you get a new bag of coffee, you have to "dial in" your grinder to find the perfect settings for that specific bean. Here is a foolproof, step-by-step process.
Step 1: Lock in your Dose
The dose is the amount of dry coffee you put in the portafilter. Your dose is largely determined by the size of your basket.
If you have an 18g basket, use 18g of coffee. Do not change this. Keep your dose constant throughout the entire dial-in process. Changing too many variables at once will leave you confused.
Step 2: Choose a Target Yield
The yield is the weight of the liquid espresso in your cup. A standard starting ratio for espresso is 1:2.
If your dose is 18g, your target yield is 36g of liquid espresso (18 x 2 = 36).
Step 3: Pull a Shot and Measure Time
Grind your 18g of coffee, prep the puck, and pull the shot. Place your cup on a scale under the portafilter and start a timer when you turn the pump on. Stop the pump when the scale reads 36g.
Note the time it took to reach 36g. Your target time is usually between 25 and 30 seconds.
Step 4: Adjust Grind Size
Now, analyze the time it took to reach your yield:
- Shot was too fast (e.g., 15 seconds): The water flowed through the coffee too easily. The espresso will taste thin and sour (under-extracted). Fix: Grind finer.
- Shot was too slow (e.g., 45 seconds): The water struggled to push through the coffee. The espresso will taste harsh, ashy, and bitter (over-extracted). Fix: Grind coarser.
- Shot was in range (25-30 seconds): You are in the ballpark!
Step 5: Adjust by Taste
Once you are hitting 18g in, 36g out, in about 27-30 seconds, it's time to taste. This is where you make micro-adjustments.
- If it still tastes a bit sour or lacks sweetness, pull the shot a little longer (try a 1:2.5 ratio, yielding 45g).
- If it tastes a bit bitter or dry, pull the shot a little shorter (try a 1:1.5 ratio, yielding 27g).
Remember: Change only one variable at a time (grind size or yield) to understand how it affects the cup!