Coffee: Flavor and Form
Like Duolingo, but for Coffee: Flavor and Form. 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 The Espresso Foundation, Navigating the Global Menu, and The Science of the Bean. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in Coffee: Flavor and Form
- Crema is composed of trapped CO2 and suspended coffee solids
- A 1:2.5 or 1:3 ratio increases clarity by diluting the heavy oils
- The crema layer is intensely bitter and often stirred in or skimmed
- Lower ratios like 1:1.5 create higher strength but muddy the flavor
- Applying the brew ratio to achieve a specific flavor profile
- 9 bars of pressure emulsify insoluble oils into the liquid
- Pressure forces tactile 'colloids' into the cup for a heavy mouthfeel
- The first drops are the most concentrated and acidic
- Understanding the sensory tradeoff of crema
- Blonding signals that the desirable solids have been depleted
- Recognizing the visual and flavor progression of a shot
- Channeling occurs when water bypasses the puck through cracks
- Identifying the cause of espresso's unique mouthfeel
- A level tamp ensures the water meets uniform resistance
- Stretching introduces air into the milk to create the initial volume
- The 'chirp' sound indicates air is being pulled in to form microfoam
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 Coffee: Flavor and Form 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.
You know that beautiful foam on top of your shot? What is actually inside those tiny bubbles?
Get it right to open this lesson and 20 more in the app.
Where Coffee: Flavor and Form takes you
Go beyond the menu to understand how ratios, milk textures, and bean origins create the diverse world of coffee flavors.
- 1
The Espresso Foundation
- The Anatomy of an Espresso Shot
- Milk Chemistry and Texture
- 2
Navigating the Global Menu
- The White Coffee Spectrum
- Short, Strong, and Concentrated
- Cold Brew and Modern Extractions
- 3
The Science of the Bean
- Terroir and Processing Styles
- The Physics of Extraction
3 sections · 7 units · 21 levels. Built to play, not to enroll.
You pick the voice
Coffee: Flavor and Form 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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The Science of the Perfect Cup
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Start Coffee: Flavor and Form today.
Download Tomo, search Coffee: Flavor and Form, and play your first lesson in under a minute.