Sour D’oh!
A cozy, scientific companion for your sourdough journey.
🏠 Welcome to Sour D’oh!
Whether this is your first starter or your 300th loaf, this space keeps your notes, timings, and “oh THAT’S what went wrong” moments in one cozy place.
Prototype – local only
How to use this prototype Beginner & expert friendly
  • Starter Lab: Create profiles for each starter, log feedings, and print a paper log if you’re elbow-deep in dough.
  • Planner: Enter your target dough weight, hydration, and room temp, then let the app suggest a timeline with hover tips for each step.
  • Bakes: Log each bake with fermentation, bake details, and your scoring.
  • Learn & Journal: Save “aha” moments, troubleshoot flops, and stash notes you’ll actually find again.
🫙 Starter Lab
Track each starter like a tiny, bubbly pet with its own habits, history, and flavor.
Multiple starters supported
New starter profile Metadata

This now saves into your browser as a reusable starter profile. You can add as many as you like.

Saved starters
No starters yet. Create one above to see it here.
Log a feeding Connected to a starter

Each feeding you save is stored under the chosen starter. Later we can visualize activity over time.

🧪 Deep Science: What’s happening after a feeding?

After you feed, wild yeasts and lactic acid bacteria wake up and start chewing through sugars. The ratio of flour, water, temperature, and time all affect which microbes “win” and how sour or mild your starter becomes.

  • Warmer temps favor faster activity but can push things more sour.
  • Cooler temps slow everything down but can build complexity.
  • Higher feed ratios (like 1:5:5) give a longer, slower rise.
🧮 Bake Planner
Define your flour mix, hydration, and schedule. Let the app help you hit your bake window.
Formula & timeline
Dough formula Inputs

Levain is just your active starter that goes into the dough. This number says how much of your flour becomes levain. If you’re not sure, 20% is a great place to start.

These inputs drive a mock formula and schedule now. Later we can tie them to your real bake history.

Suggested schedule Preview
Enter a target weight, hydration, levain %, and room temperature above, then click Calculate formula. This area will show a rough timeline with hover tips for each step.
📊 Bake Log & Analytics
Log every loaf with full details: formula, fermentation, bake, and evaluation.
Prototype – unlimited bakes (saved in this browser)
New bake entry Session
Formula & dough
Fermentation
Proof & bake
Evaluation
Saved bakes
No bakes saved yet. Log one above to start your history.
📚 Learn & troubleshoot
Quick, friendly explanations of the weird stuff that happens between flour, water, and time.
Evergreen notes
Common issues Beginner-friendly
  • Flat loaf: Under-fermented, over-proofed, weak shaping, or too low an oven temp are the usual suspects.
  • Gummy crumb: Often under-baked, or cut too soon. Let it cool fully before slicing.
  • Too sour: Long, warm ferments or very old starter. Shorten bulk or use cooler temps.
  • Not sour enough: Increase cold proof time or use a more mature starter.
Glossary Plain language
  • Autolyse: A rest with just flour and water to start gluten formation with little effort.
  • Bulk ferment: The first rise after mixing everything together.
  • Proof: The final rise after shaping, right before baking.
📝 Bake journal
Capture stories, experiments, and “never again” moments that don’t fit neatly into a form.
Free-form notes
New journal entry
Saved journal entries
No entries yet. Start by saving one above.
👨‍👩‍👧‍👦 Family recipes
Keep heirloom formulas, “Grandma’s notes,” and favorite variations in one safe, sharable place.
Heirloom stash
New family recipe
Saved family recipes
No recipes saved yet. Add one above to pin it in place.
⚙️ Settings & tools
Tweak how the app behaves and use quick converters when you’re juggling recipes from different sources.
Local prototype
Units & quick converters Customizable
Weight units

Most sourdough bakers (even in the US) use grams for accuracy. Ounces are available if preferred.

Temperature units

Choose whichever matches your oven and thermometer. Many US ovens are °F even when recipes are °C.

These are just quick tools so you don’t have to leave the page when a recipe is in the “wrong” units.

Beta feedback

How is Sour D'oh! treating you?

While this is in beta, your feedback goes straight into what we fix and build next.

This beta widget sends a lightweight snapshot of your experience to the same feedback log as the full form.

Sour D’oh! – Starter Log

Starter name: ____________________________

Use this sheet at the counter, then transfer the info back into the app when your hands aren’t covered in flour.

Starter profile

Hydration (%)
Flour blend
Usual room temp (°C/°F)
Typical feeding ratio
Notes

Feeding log

Date Time Feed ratio
(starter : flour : water)
Room temp
(°C or °F)
Time to peak
(hours)
Notes (bubbles, smell, hooch, etc.)
           
           
           
           
Data note: Everything you enter here is stored only in this browser for now. Clearing browser storage will wipe it. Sour D’oh! prototype · v1 – educational & utility demo