Baking with Yeast
Take full control of your homemade breads, pizzas, and rolls. Learn how to keep yeast alive, judge dough rises by sight instead of the timer, and use cold fermentation to coax bakery-quality flavor from simple ingredients.
Like Duolingo, but for Baking with Yeast. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 11 levels across 2 sections, about 22 minutes end to end, roughly 4 days at five minutes a day. It moves through Getting the Rise Right and Flavor and Dough Control. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Baking with Yeast
- Water for activating yeast should feel lukewarm or comfortably warm like a baby's bath
- Yeast is a living organism that dies when exposed to water above roughly 130°F (55°C)
- Dead yeast cannot be revived by cooling the mixture down
- Active dry yeast granules have a protective shell of dead yeast cells that must soften in liquid
- Instant yeast is milled finely enough to hydrate and activate directly in dry flour
- Yeast breaks down the natural starches present in flour into fermentable sugars
- Added sugar acts as a quick booster to speed up rising, but is entirely optional for fermentation
- Active yeast consumes sugars and releases carbon dioxide gas, producing a bubbly, frothy foam
- A flat, murky bowl of water means the yeast is dead and must be discarded
- Direct contact with concentrated salt draws water out of yeast cells through dehydration, killing or stunning them
- Dispersing salt throughout the dry flour keeps it diluted enough that it regulates fermentation without destroying the yeast
- Warm rooms speed up yeast fermentation, while cool rooms slow it down
- Recipe rise times are only general guidelines based on ideal room temperatures
- Dough volume and growth are the true signals of fermentation progress, not the clock
- Dough that pushes back aggressively still has strong elasticity and needs more rise time
- A dough that slowly recovers halfway holds enough gas to bake
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 Baking with Yeast 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 if ye pour water hotter than 130°F (55°C) over your yeast?
Get it right to open this lesson and 10 more in the app.
Where Baking with Yeast takes you
- 1
Getting the Rise Right
- Activating and Feeding Yeast
- Reading the Dough's Fermentation
- 2
Flavor and Dough Control
- Cold Fermentation and Long Rises
- Diagnosing Dough and Bake Problems
2 sections · 4 units · 11 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Baking with Yeast is taught in the The Pirate style: arr, learning be an adventure!. 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.
More Food & Drink on Tomo
Bake Your First Perfect Loaf
Stop guessing and start baking bread that actually tastes good. Master the simple rhythms of dough to turn your kitchen into a professional-smelling bakery.
The Mechanics of Sourdough
Bridge the gap between following sourdough recipes and truly controlling your bake. Master dough tension, open crumb architecture, hydration limits, and fermentation chemistry.
Sourdough Bread: Crumb, Crust, and Ferment
Move beyond dense, unpredictable loaves by mastering dough tension, fermentation cues, and heat physics. Learn to diagnose crumb defects, handle high hydration, and steer microbial activity for explosive oven spring.
Sourdough: Baking with Wild Yeast
Stop following rigid recipes and start understanding the living ecosystem of wild yeast to bake crusty, tangy bread at home.
Proofing Sourdough Bread
Stop guessing your fermentation by the clock. Learn the tactile cues, visual markers, and temperature tricks to bake light, airy sourdough loaves every time.
Mastering Sourdough at Home
Stop buying expensive loaves and start baking your own tangy, crusty bread. Learn to keep a starter alive and bake your first masterpiece using just flour, water, and salt.
Start Baking with Yeast today.
Download Tomo, search Baking with Yeast, and play your first lesson in under a minute.