Data logging for espresso
How to use data logging to track espresso variables, improve consistency, and support recipe development.

- Coffee Basics Nerds
- 2 min read
Article 9 of 12 in Espresso Fundamentals/

Why Data Logging Matters
- Espresso is highly sensitive to small changes in grind, dose, yield, and time.
- Logging ensures repeatability, supports troubleshooting, and accelerates dialing-in.
- Provides evidence for quality control in cafés and competitions.
Key Variables to Log
- Dose: grams of coffee in basket.
- Yield: beverage weight (g).
- Time: shot duration (s).
- Brew Ratio: ratio of dose to yield.
- Grind Setting: burr position or grinder reference.
- Temperature: grouphead or PID setpoint.
- Pressure / Flow Profile: preinfusion, ramp, hold, decline.
- Sensory Notes: acidity, sweetness, bitterness, balance, body.
- Equipment Notes: machine type, burr condition, basket size.
Tools for Logging
- Manual Logs: notebooks, spreadsheets, recipe cards.
- Digital Tools: apps (e.g., Barista Hustle, Roast World), café POS integrations.
- Advanced Systems: machines with built-in shot profiling and cloud data sync.
Benefits
- Faster recipe replication across shifts and baristas.
- Easier troubleshooting when shots run too fast, slow, or taste imbalanced.
- Supports training by showing patterns between variables and flavor.
- Creates historical database for seasonal coffees.
Best Practices
- Standardize the format (dose/yield/time always written the same way).
- Record both objective metrics (grams, seconds, pressure) and subjective notes (flavor, mouthfeel).
- Review logs weekly to refine recipes and track consistency.
Summary
Data logging transforms espresso from guesswork into a measurable, repeatable process. By consistently recording key brew parameters and taste notes, baristas can achieve precision, improve training, and ensure quality across every shot.