Barista Craft and Calibration
Bridge the gap between basic espresso brewing and professional sensory control. Learn how to diagnose extraction flaws by taste, eliminate channeling through puck prep, and texture silky microfoam with precision.
Like Duolingo, but for Barista Craft and Calibration. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 12 levels across 2 sections, about 24 minutes end to end, roughly 5 days at five minutes a day. It moves through Mastering the Extraction and Milk Physics and Integration. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Barista Craft and Calibration
- Under-extraction releases fast-dissolving acids that taste sharp and salty
- Over-extraction pulls heavy bitter compounds that dry out the palate
- Balanced shots balance upfront organic acids with sweet mid-palate lipids
- Premature blonding indicates water has carved cracks through the coffee puck
- Sudden flow acceleration reveals localized puck erosion rather than uniform grind drift
- Channeling produces simultaneously sour and bitter notes from uneven flow paths
- Increasing liquid yield pulls more sweet and bitter compounds to cut sharp acidity
- Grind adjustments directly change surface area and alter total contact time
- Dialing yield shifts flavor balance faster than recalibrating grinder burrs
- Bright organic acids and salty flavors dissolve first in early flow
- Caramelized sugars and sweet solubles extract during the middle third
- Heavy plant fibers, polyphenols, and dry bitter notes exit the puck last
- Dense light roasts need higher thermal energy around 93°C–96°C to dissolve sugars
- Low brew temperatures stall extraction in light roasts, leaving astringent vegetal notes
- Darker roasts require lower water temperatures to avoid burning fragile solubles
- Grinders eject micro-clumps that create uneven density pockets inside the bed.
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 Barista Craft and Calibration 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 kind of mouthfeel and taste does an over-extracted espresso leave behind?
Get it right to open this lesson and 11 more in the app.
Where Barista Craft and Calibration takes you
- 1
Mastering the Extraction
- Diagnosing Extraction by Taste and Flow
- Precision Puck Preparation
- 2
Milk Physics and Integration
- Microfoam Hydrodynamics and Milk Chemistry
- Pour Mechanics and Latte Integration
2 sections · 4 units · 12 levels. Built to play, not to enroll.
You pick the voice
Barista Craft and Calibration 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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Espresso: Craft and Technique
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Start Barista Craft and Calibration today.
Download Tomo, search Barista Craft and Calibration, and play your first lesson in under a minute.