You’ve just brewed the best pale ale of your life. It’s crisp, hoppy, perfectly balanced — and you have no idea how to replicate it. You vaguely remember the malt bill, think the mash temperature was around 66°C, and you’re fairly sure you used Citra hops. Fairly sure. This is what happens when you don’t keep records, and it happens to every homebrewer at least once. The good news is that brew logging is simple, takes five minutes per session, and transforms your brewing from guesswork into a repeatable craft.
In This Article
- Why Keeping Brew Records Matters
- What to Record on Brew Day
- What to Record During Fermentation
- Tasting Notes and Evaluation
- Paper vs Digital: Which Is Better
- Best Homebrew Apps and Software
- Setting Up a Brew Log Template
- How to Use Your Records to Improve
- Common Record-Keeping Mistakes
- Tracking Costs and Ingredients
- Sharing Recipes and Brew Logs
- Building a Personal Recipe Library
- Frequently Asked Questions
Why Keeping Brew Records Matters
Reproducibility
The most obvious reason. If a batch turns out well, you want to brew it again. If it turns out badly, you want to know what went wrong. Without records, every brew is a first attempt. With records, every brew builds on the last one.
Troubleshooting Off-Flavours
Something tastes wrong — buttery, sour, medicinal, cidery. Without notes on your process, you’re guessing at the cause. With records showing your fermentation temperature spiked to 24°C on day three, or your mash pH was 5.8 instead of 5.4, the diagnosis becomes obvious. We’ve tracked down at least four off-flavour issues in our own brewing through nothing more than reviewing brew day notes.
Tracking Improvement
When you start homebrewing, everything is new and inconsistent. After 10-15 batches with good records, you start seeing patterns — your efficiency is consistently 72-75%, your fermentation always takes 10-12 days, your favourite yeast strain attenuates to 78% every time. This baseline knowledge makes you a better brewer because you can spot when something deviates from your normal.
Recipe Development
Creating your own recipes is the most satisfying part of homebrewing. But it requires iteration — brew, taste, adjust, brew again. Records make this process systematic rather than chaotic. “Last time I used 300g of Crystal 40 and it was too sweet — try 200g this time” is vastly more useful than “I think I used less crystal than usual.”
What to Record on Brew Day
The Recipe
This seems obvious, but write down what you actually used, not what you planned to use. Plans change on brew day — the shop was out of Maris Otter so you used Golden Promise, or you only had 45g of Cascade instead of 50g.
Record:
- Every grain — type, weight in grams, and percentage of the total bill
- Every hop addition — variety, weight, alpha acid percentage, and boil time (60 min, 15 min, flameout, dry hop)
- Yeast — strain, manufacturer, form (dry or liquid), batch/expiry date
- Water — volume (pre-boil and post-boil), any water chemistry adjustments
- Other additions — Irish moss, whirlfloc, sugar, fruit, spices
Mash Details
- Mash temperature — target and actual. Check it at 15, 30, and 45 minutes to see how well your system holds temperature
- Mash duration — total time grain is in the mash
- Mash pH — if you’re measuring it (you should be from your 5th brew onwards)
- Sparge method — batch, fly, or no-sparge, and sparge water temperature
- Pre-boil gravity — this tells you your mash efficiency
Boil Details
- Boil duration — standard is 60 minutes, but some recipes call for 90
- Hop addition times — when each hop goes in
- Boil-off rate — how much volume you lose per hour. This varies by system and is useful for future recipe scaling
Post-Boil Numbers
- Original gravity (OG) — the density of your wort before fermentation. Take this reading with a calibrated hydrometer
- Volume into fermenter — how many litres actually made it into the fermenter after trub losses
- Pitch temperature — the temperature of the wort when you add the yeast
What to Record During Fermentation
Temperature Tracking
Fermentation temperature is the single biggest variable affecting beer flavour. Record the ambient temperature and, if you have a stick-on thermometer, the fermenter temperature:
- Day 1-3 — active fermentation. Temperature often rises 1-2°C above ambient from yeast activity
- Day 4-7 — monitor for any spikes or drops
- Day 7+ — note when fermentation activity slows and stops
Gravity Readings
Take gravity readings at key points:
- Original gravity (OG) — brew day
- Mid-fermentation — day 4-5 (optional but useful)
- Terminal gravity — when fermentation appears complete
- Final gravity (FG) — confirm it’s stable (same reading 48 hours apart)
The gap between OG and FG tells you your ABV. Knowing your typical attenuation for each yeast strain helps you predict future brews.
Observations
Note anything unusual:
- When the airlock started bubbling
- When activity peaked and slowed
- Any strange smells from the fermenter
- Krausen height and colour
- Whether you cold crashed, dry hopped, or added any post-fermentation ingredients
Tasting Notes and Evaluation
When to Taste
Taste your beer at three points:
- After carbonation (2-3 weeks post-bottling or kegging) — first impressions
- At peak (4-6 weeks for most ales) — how does it taste at its best?
- Aged (3+ months, if any survives) — how has it changed over time?
What to Note
- Appearance — colour, clarity, head retention, carbonation level
- Aroma — what do you smell? Hops, malt, fruit, yeast character, off-flavours?
- Flavour — sweet, bitter, sour, roasty, fruity, spicy? Rate the balance between malt and hops
- Mouthfeel — thin, medium, full? Carbonation level? Smooth or sharp?
- Overall — would you brew this again? What would you change?
The Honest Assessment
Be brutal with yourself. “It’s fine” isn’t useful for future reference. “Malt backbone is too thin, needs 200g more Munich, hop aroma fades by week 3, consider dry hopping with Amarillo instead of Cascade” — that’s a note you can act on.
Paper vs Digital: Which Is Better
Paper Notebooks
- Advantages: No battery, no software to learn, satisfying to write in, won’t crash mid-brew-day
- Disadvantages: Can’t search, can’t calculate, hard to share, gets beer-splashed
A dedicated A5 notebook with a waterproof cover is the classic approach. Many homebrewers still prefer it, and there’s something genuinely appealing about a shelf of brew journals spanning years of brewing.
Spreadsheets
- Advantages: Searchable, can include calculations (ABV, efficiency, IBU), free, easy to back up
- Disadvantages: Fiddly on a phone during brew day, needs discipline to maintain format consistency
Google Sheets works well — accessible from any device, automatically backed up, and shareable if you brew with others.
Dedicated Brewing Software
- Advantages: Built-in calculations, recipe scaling, ingredient databases, water chemistry tools
- Disadvantages: Monthly costs for premium features, learning curve, locked into one platform
Best Homebrew Apps and Software
Brewfather — Best Overall
Brewfather is the most popular brewing app in the UK homebrew community, and for good reason. The recipe builder handles everything from grain bills to water chemistry, the fermentation tracker logs temperature and gravity over time, and the equipment profiles let you calibrate for your specific setup.
- Price: Free tier (limited recipes), £20/year for premium
- Platform: Web app, iOS, Android
- Best for: All-grain brewers who want thorough tracking
BeerSmith — Best for Desktop
BeerSmith has been the standard for serious homebrewers for over a decade. The desktop software is powerful but has a steeper learning curve than Brewfather. It includes detailed water chemistry, yeast performance tracking, and inventory management.
- Price: About £25 one-off (desktop), £10/year (mobile)
- Platform: Windows, Mac, iOS, Android
- Best for: Experienced brewers who want maximum control
Brewer’s Friend — Best Free Option
Brewer’s Friend offers a solid free tier with recipe building, brew session logging, and basic calculations. The community recipe database is extensive, giving you access to thousands of tested recipes with full brew logs.
- Price: Free (with ads), £20/year for premium
- Platform: Web app
- Best for: Beginners who want to start logging without spending money
Setting Up a Brew Log Template
Whether you use paper or digital, your template should capture these categories:
Header
- Brew date
- Batch number
- Beer name and style
- Target OG / FG / ABV / IBU
Ingredients
- Grain bill (type, weight, percentage)
- Hops (variety, weight, alpha acid, timing)
- Yeast (strain, form, quantity)
- Water (volume, any additions)
Process
- Mash temperature and duration
- Mash pH
- Pre-boil gravity and volume
- Boil duration and hop schedule
- OG, pitch temperature, volume into fermenter
Fermentation
- Fermentation temperature (daily or every other day)
- Gravity readings with dates
- Dry hop or other additions
- Packaging date and method (bottle or keg)
Evaluation
- Tasting notes at 2 weeks, 4 weeks, and 3 months
- Rating (1-10)
- Changes for next time
How to Use Your Records to Improve
Calculate Your Efficiency
After 5+ batches, average your mash efficiency (actual extract vs theoretical extract). Knowing your typical efficiency — say 72% — lets you accurately predict your OG from any grain bill. This transforms recipe development from guesswork into science.
Spot Recurring Problems
If three out of your last five batches have been under-attenuated, your records might reveal a pattern — maybe your mash temperature is consistently running 2°C higher than you think, producing more unfermentable sugars. Without records, you’d just think you’re bad at brewing.
Track Ingredient Performance
Different malt brands and hop varieties perform differently across batches. Records help you identify which ingredients produce the results you want — maybe Simpsons Maris Otter gives you better efficiency than Crisp, or Galaxy hops lose their tropical character after three weeks in the bottle.
Seasonal Patterns
UK brewing changes with the seasons. Summer fermentation temperatures run higher (potentially producing off-flavours), winter mash temperatures drop faster. Records spanning a full year reveal these patterns and help you plan accordingly.
Common Record-Keeping Mistakes
Only Recording the Recipe
The recipe is 30% of the information. Process details — temperatures, timings, pH, gravity readings — are where the real diagnostic value lives. Two identical recipes brewed at different mash temperatures produce noticeably different beers.
Forgetting to Take Gravity Readings
This is the most common omission. OG and FG are fundamental to understanding your beer — ABV, attenuation, efficiency all derive from these two numbers. Get into the habit of taking readings every single time, even on brew days when you’re tired and just want to clean up. Your future self will thank you.
Not Recording Failures
Failed batches are the most valuable entries in your brew log. A successful brew confirms what works. A failure reveals what doesn’t — and prevents you from making the same mistake twice. Don’t skip logging a batch because it didn’t turn out well.
Inconsistent Detail Level
Your first few logs are thorough — every temperature, every timing, meticulous notes. By batch 15, you’re writing “brewed a pale ale, tasted fine.” Maintain the same level of detail on every batch. Discipline with logging is what separates brewers who improve steadily from those who plateau.
Tracking Costs and Ingredients
Why Track Costs
Homebrewing isn’t always cheaper than buying craft beer — especially once you factor in equipment, ingredients, and the occasional batch that goes down the drain. Tracking costs per batch gives you an honest picture of what your hobby actually costs. The HMRC beer duty guidance confirms that homebrewing for personal use is duty-free, which is at least one cost you don’t need to worry about.
Cost Per Pint
A simple calculation:
- Total ingredient cost for the batch
- Divided by the number of pints produced
- Typical range: £0.40-1.20 per pint for most homebrew
Tracking this over time helps you identify where money goes and where savings are possible — buying grain in bulk, reusing yeast, growing your own hops.
Ingredient Inventory
If you brew regularly, keeping a simple inventory of your grain, hops, and yeast stock prevents emergency trips to the homebrew shop and ensures ingredients are used before they deteriorate. Note the purchase date and storage conditions alongside quantities.
Sharing Recipes and Brew Logs
Why Share
The homebrew community thrives on shared knowledge. Publishing your recipes and brew logs — including the failures — helps other brewers and often generates feedback that improves your own brewing. Most brewing apps include a sharing feature with one-click export.
Where to Share
- Homebrew forums (e.g., Jim’s Beer Kit, The Homebrew Forum)
- Reddit (r/homebrewing, r/UKhomebrew)
- Brewing app communities (Brewfather and Brewer’s Friend both have recipe databases)
- Local homebrew clubs — many UK towns have active clubs that meet monthly
What to Include
When sharing a recipe, include the full brew log — not just the ingredient list. Other brewers need to see your mash temperature, fermentation temperature, water profile, and tasting notes to meaningfully replicate or adapt your recipe.
Building a Personal Recipe Library
After 10-20 batches, you’ll have a collection of recipes that you’ve refined and documented. Organise them by style, season, or occasion:
- House pale ale — your go-to recipe, dialled in over 5+ iterations
- Winter warmer — a strong ale for cold months
- Summer session beer — light, crushable, under 4% ABV
- Experimental — one-off batches testing new ingredients or techniques
Each recipe should have version numbers and notes on what changed between versions. “Pale Ale v3: dropped Crystal from 8% to 5%, increased Citra dry hop by 10g, much better” is the kind of evolution that turns a decent recipe into your signature beer.
Frequently Asked Questions
What’s the minimum I should record for each brew? At absolute minimum: recipe (grains, hops, yeast, water volume), OG, FG, fermentation temperature range, and a brief tasting note. This takes five minutes and gives you enough to reproduce or troubleshoot the batch.
Is a dedicated brewing app worth paying for? If you brew monthly or more, yes. The calculations, recipe scaling, and organised logging save time and reduce errors. Brewfather at £20/year is excellent value. For occasional brewers (4-6 batches per year), a free spreadsheet works fine.
Should I record every fermentation temperature reading? Daily readings during active fermentation (days 1-7) are ideal. After that, every 2-3 days is sufficient. If you use a temperature controller, recording the set point and any deviations is enough — you don’t need to check hourly.
How do I calculate mash efficiency from my records? Divide your actual extract (measured OG converted to points per pound per gallon) by the theoretical maximum extract from your grain bill. Most brewing software calculates this automatically. Typical homebrew efficiency ranges from 65-80%.
What should I do with records from bad batches? Keep them. Bad batches are your most valuable learning material. Compare the process notes from a failed batch with a successful one and you’ll often find the variable that caused the problem — a temperature spike, a different yeast, a shorter boil.