Track the variables that let you repeat a brew and understand what changed: the coffee, method and equipment, coffee dose, water amount and ratio, grind, brew time, sensory result, and your next adjustment. Add temperature, pour details, water, and filter information when they matter to your method or experiment. A simple notebook is enough; a scale with a timer makes dose, water, and time easier to record consistently.
The core brew-journal fields
A useful entry is detailed enough to compare with another brew, but not so elaborate that you stop keeping it. Start with these fields:
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- Coffee: roaster or origin, if known; variety or processing only when stated; roast date; roast level if supplied; and date brewed. Record what the bag says rather than filling in unknown details.
- Method and equipment: brewing method, brewer, filter shape and material, and grinder. Record the recipe or technique you followed.
- Dose and water: dry coffee mass and brewing water mass. Write the ratio in a consistent format, such as grams of coffee per grams of water.
- Grind: grinder make or model and its setting. A setting number is meaningful mainly on that grinder; it does not transfer reliably between grinders.
- Time: total brew or contact time, plus useful method-specific timings such as bloom and drawdown.
- Taste and preference: brief notes on strength, acidity or sourness, sweetness, bitterness, body, clarity, and overall liking.
- Change and next step: note what you changed from the previous attempt and what single adjustment you plan to try next.
For example, a compact entry could read: “Washed Honduran coffee, roast date on bag; pour-over; 15 g coffee, 250 g water (1:16.7); grinder setting 5; 2:45 total; sweet, light body, slight bitterness; next: keep recipe, grind one step coarser.” The details in a real entry should come from your bag, equipment, and brew, not assumptions.
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Water temperature and brew stages
Record water temperature at the point of use when you can, along with bloom water and duration or the timing of other stages. Temperature, grind, flow, and time interact, so it can be useful to know both the setting and what happened during the brew. A Specialty Coffee Association interview about a UC Davis study reports tests of hot drip coffee at 87°C, 90°C, and 93°C with a representative wet-processed Honduran Arabica. Under those experimental conditions, temperature differences had little sensory impact when final brew strength and extraction yield were held constant. The interview also emphasizes that temperature affects extraction speed, and that result should not be generalized automatically to espresso, immersion, cold brew, or every coffee. Read the SCA interview and study discussion.
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Pouring, agitation, water, and filter
For pour-over, note pour count or schedule, bloom amount and time, stirring or swirling, and any other agitation. For other methods, capture the equivalent actions that could affect wetting or flow. Record water source or a water recipe if known, and the filter type. SCA brewing best-practices material identifies ratio, water quality, grind, contact time, temperature, turbulence, and filter media as brewing considerations; the available PDF search extract is the basis for these points. See SCA brewing best practices.
Measured outcomes are optional
Total dissolved solids (TDS) describes the concentration of dissolved material in the brewed drink. Extraction yield describes the fraction of the coffee grounds’ material transferred into the liquid. They are related to brew ratio, but they are not interchangeable. If you use a refractometer, record the measured TDS and use the appropriate calculation for extraction yield; otherwise, leave those numbers out rather than estimating them. SCA’s discussion of brewing measurement and sensory work also cautions against treating descriptive flavor attributes as identical to consumer preference. Read the SCA discussion of brewing charts and measurement.
Use the journal to learn from each brew
- Choose one goal. For example, you might want more strength, less bitterness, or a flavor you prefer.
- Hold the other inputs steady as much as practical. Use the same coffee, method, and equipment when comparing attempts.
- Change one controllable input. A single planned change makes the result easier to interpret, though brewing variables can interact and one change may affect several sensory qualities.
- Record what happened and what you liked. Keep tasting observations separate from your personal preference: “more acidic” describes a quality; “I preferred it” describes your response.
- Choose the next adjustment from your own results. Treat recipe charts as references, not universal quality scores. The SCA notes that classic brewing charts can conflate descriptive taste with liking and compress diverse flavors into a small set of labels.
How much detail is enough?
For a minimal log, record coffee, method, dose, water, grind, time, taste, and next adjustment. Add temperature, pour structure, water source, filter, or measured outcomes when those factors are relevant to the method or the question you are testing. The goal is a repeatable record you will actually use, not a complete laboratory report.
The SCA’s research features describe broad sensory work, including a 2016 flavor lexicon of 105 attributes from World Coffee Research and the SCA, and more than 58,000 sensory descriptive data points from a UC Davis Coffee Center research program reported by the SCA in 2020. Those figures describe research resources, not a checklist a home brewer needs to reproduce. The SCA standards index lists home coffee brewer and grinder certification standards SCA-310 and SCA-320 as member-access items; this journal guidance does not reproduce those specifications or claim compliance with them. Check the SCA standards index.
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