Espresso Mechanics and Barista Craft
Bridge the gap between pulling basic shots and commanding the espresso bar. Master dial-in variables, diagnose extraction flaws by taste, steam silky microfoam, and understand the physics inside the portafilter.
Like Duolingo, but for Espresso Mechanics and Barista Craft. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
21 levels across 4 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Dialing In the Shot, Tasting and Sensory Calibration, Milk Science and Pour Dynamics, and Hardware and Physics Behind the Bar. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Espresso Mechanics and Barista Craft
- Dry dose determines headspace between the puck surface and shower screen
- Changing dose alters puck depth and shifts basket flow resistance unpredictably
- Locking dose keeps basket geometry constant so grind changes behave predictably
- Beverage yield sets espresso strength (TDS) and overall flavor extraction balance
- Water mass pulled through the bed determines total extracted soluble mass
- Stopping by shot time produces wild swings in yield whenever flow rate drifts
- Shot duration reflects the puck's dynamic resistance against pump pressure
- Cutting a shot early to force target time ruins your intended brew ratio
- Fast or slow run times signal whether grind size needs adjusting
- Grind setting directly alters surface area and interstitial pore spacing
- Changing particle size tunes flow rate while preserving dry-to-liquid ratio
- Locking dry dose establishes basket headspace and puck geometry first
- Setting target liquid cup weight anchors your baseline brew ratio
- Observing total contact time indicates whether grind size must shift
- Water rushes through fissures, over-extracting bitter notes from narrow paths
- The surrounding dense coffee is bypassed, leaving sour under-extracted notes
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 Espresso Mechanics and Barista Craft 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 to the coffee bed when you change your dry dose?
Get it right to open this lesson and 20 more in the app.
Where Espresso Mechanics and Barista Craft takes you
- 1
Dialing In the Shot
- Isolating Extraction Variables
- Puck Preparation and Channeling Prevention
- 2
Tasting and Sensory Calibration
- Diagnosing Extraction on the Palate
- 3
Milk Science and Pour Dynamics
- Steaming Microfoam and Milk Thermodynamics
- Fluid Dynamics and Pattern Pouring
- 4
Hardware and Physics Behind the Bar
- Grinder Geometry and Particle Distribution
- Water Chemistry and Extraction Dynamics
4 sections · 7 units · 21 levels. Built to play, not to enroll.
You pick the voice
Espresso Mechanics and Barista Craft is taught in the The Professor style: clear, structured, thorough. 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 Barista's Craft
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Start Espresso Mechanics and Barista Craft today.
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