The Mechanics of Sourdough
Like Duolingo, but for The Mechanics of Sourdough. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Diagnosing and Controlling Bulk Fermentation; Dough Architecture, Shaping, and Baking; and Starter Kinetics and Flour Chemistry. It assumes you already know the basics.
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Key ideas in The Mechanics of Sourdough
- Sourdough fermentation rate is governed by internal dough temperature rather than recipe clock time
- A few degrees shift dough temperature and exponentially accelerate yeast and bacteria metabolism
- Relying on kitchen timers rather than physical fermentation cues routinely leads to over-proofing
- Warm sourdough ferments rapidly through shaping and chilling, requiring a smaller initial rise
- Dough at 80°F+ often peaks around 30-50% rise, whereas cooler dough needs 75-100% to finish proofing
- Pushing warm sourdough to double in volume leads to enzymatic gluten breakdown in the basket
- A healthy sourdough displays domed, rounded edges where the dough meets the container wall.
- A convex, taut upper surface proves the gluten sheath is actively containing internal gas pressure.
- Flat, concave, or pooling edges reveal that the dough has lost gluten integrity or is under-developed.
- A properly aerated sourdough jiggles uniformly like a bowl of set gelatin from core to edge.
- Surface bubbles can appear early without indicating deep, distributed gas aeration in the mass.
- Dense, heavy sloshing means carbon dioxide remains localized and fermentation needs more time.
- Sourdough fermentation rate is governed by internal dough temperature rather than recipe clock time.
- Ending bulk slightly early leaves gluten bonds elastic enough to pull a tight shaping skin.
- Fully expanded sourdough exhausts gluten extensibility and tears easily during preshaping.
- Extensible gluten requires residual fermentative strength to withstand tight final shaping.
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Mechanics of Sourdough the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What happens when your dough temperature rises by just a few degrees?
Get it right to open this lesson and 20 more in the app.
Where The Mechanics of Sourdough takes you
Bridge the gap between following sourdough recipes and truly controlling your bake. Master dough tension, open crumb architecture, hydration limits, and fermentation chemistry.
- 1
Diagnosing and Controlling Bulk Fermentation
- Reading Bulk Fermentation Beyond the Clock
- Diagnosing Crumb Architecture and Bake Defects
- 2
Dough Architecture, Shaping, and Baking
- Taming High Hydration and Building Structure
- Shaping and Securing Surface Tension
- Steam Dynamics and Oven Spring
- 3
Starter Kinetics and Flour Chemistry
- Manipulating Starter Flavor and Acid Balance
- Flour Chemistry and Hydration Ceilings
3 sections · 7 units · 21 levels. Built to play, not to enroll.
You pick the voice
The Mechanics of Sourdough is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Mechanics of Sourdough today.
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