FIX A SHOT / ONE CHANGE AT A TIME
Record what happened. Change one thing. Say if the next cup was Better, Same, or Worse. Then use that result to choose what to try next.
START HERE
Change one thing.FIX A SHOT
SHOT RECEIPT / SAMPLE VALUES
These values are an example. Enter your shot and confirm the details to get one next step.
Save a shot to start a history on this device.
Your first saved shot will appear here with its measurements and next step.
HOW TO USE THE RESULT
Time helps you compare shots when you also measure coffee in and espresso out. Extraction yield means how much coffee dissolves into the drink. Time does not prove even flow or tell you what you will like.
The receipt gives one next change and lists what to keep the same. Better, Same, or Worse tells you whether to keep, undo, or redirect that change.
The tool can calculate the brew ratio and average flow. It cannot see the puck, measure dissolved solids, certify the machine, or confirm channeling from a checkbox. A bottomless portafilter can make flow visible, but its view is still a clue rather than proof.
START WITH WHAT YOU TASTED
Each guide gives the first action, explains what your measurements can show, and opens Fix a shot with the symptom selected.
See all troubleshooting guides →Use taste, flow, and time to choose one next step for sour espresso.
Open the guide →02 / BITTERBitter or harsh espresso: what to change nextUse the flow and taste to choose one next step for bitter or harsh espresso.
Open the guide →03 / CONFLICTING SIGNALSSour and bitter espresso: fix the flow firstSour and bitter together call for a preparation check before another grind change.
Open the guide →04 / FAST FLOWEspresso ran too fast: what to change nextUse one finer-grind test when a measured shot runs too fast.
Open the guide →05 / SLOW FLOWEspresso ran too slow or stopped: what to change nextUse one coarser-grind test when a measured shot runs too slowly or stops.
Open the guide →SOURCES USED
Research, manufacturer guidance, practical guides, and standards context stay separate. None of these sources is a physical test by Espresso Receipt.
Supports the nonuniform-flow warning at very fine settings; it does not diagnose an individual puck.
(opens in a new tab)Supports interactions among flow, particle size, temperature, and brew ratio; it does not provide a universal sensory recipe.
(opens in a new tab)Supports recording dose, beverage mass, time, and taste and using grind as a controlled lever; its time bands are reference bands, not pass-fail standards.
(opens in a new tab)Supports separating strength, extraction, yield, and evenness; it remains a practitioner framework rather than an individual measurement.
(opens in a new tab)Provides standards context only. Espresso Receipt does not perform or imply SCA certification testing.
(opens in a new tab)