Barista Craft Behind the Bar
Step behind the commercial machine and master professional barista technique. Learn to dial in espresso by taste, texture silky microfoam, execute standard cafe menus, and keep a high-volume bar running smoothly.
Like Duolingo, but for Barista Craft Behind the Bar. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
25 levels across 4 sections, about 50 minutes end to end, roughly 10 days at five minutes a day. It moves through Dialing In and Shot Mechanics, Milk Craft and the Espresso Menu, Sensory Calibration and Filter Methods, and Bar Workflow and Equipment Health. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Barista Craft Behind the Bar
- A prolonged brew time over-extracts bitter and astringent compounds.
- Keeping dose and target yield fixed isolates grind size as the variable.
- Coarsening the grind lowers bed resistance to reduce shot duration.
- Commercial grinders trap grounds between burrs and the exit chute.
- Adjustments do not affect coffee already sitting in the chute chamber.
- Purging a dose clears old grinds so the next shot reflects the change.
- Finer grinds break beans into vastly more microscopic particles.
- Greater total particle surface area increases resistance to water flow.
- Higher puck resistance extends water contact time through the espresso bed.
- Ambient humidity causes coffee grounds to absorb moisture and swell.
- Swelling particles can alter packing density and channel water faster.
- Micro-adjusting the collar finer restores bed resistance and flow time.
- Crema contains trapped carbon dioxide bubbles that inflate visual volume.
- Fresh roasts produce significantly more airy crema than older beans.
- Gram weight measures actual liquid mass unaffected by foam depth.
- Nine bars of water rush through micro-clumps via cracks of least resistance
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 Behind the Bar 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.
Why keep your dose and target yield the same when dialing in espresso?
Get it right to open this lesson and 24 more in the app.
Where Barista Craft Behind the Bar takes you
- 1
Dialing In and Shot Mechanics
- The Daily Dial-In
- Puck Preparation and Channeling
- 2
Milk Craft and the Espresso Menu
- Microfoam Physics and Steaming
- Drink Architecture and Espresso Styles
- 3
Sensory Calibration and Filter Methods
- Diagnosing Extraction by Taste
- Manual Pour-Over Behind the Bar
- 4
Bar Workflow and Equipment Health
- Speed, Rhythm, and Bar Workflow
- Machine Maintenance and Water Chemistry
4 sections · 8 units · 25 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
Barista Craft Behind the Bar is taught in 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.
More Food & Drink on Tomo
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The Barista's Craft
Move beyond basic button-pressing and master the levers of espresso extraction and milk texture. Learn to diagnose flavor flaws by taste, eliminate channeling through deliberate puck prep, and steam glossy microfoam every time.
Coffee Extraction and Barista Craft
Bridge the gap between home brewer and working barista. Master dial-in adjustments, milk thermodynamics, sensory calibration, and water chemistry behind the bar.
Espresso Extraction and Technique
Bridge the gap between pulling erratic shots and consistently crafting cafe-quality espresso. Learn the mechanics of puck prep, extraction diagnosis, flow profiling, and microfoam chemistry.
Start Barista Craft Behind the Bar today.
Download Tomo, search Barista Craft Behind the Bar, and play your first lesson in under a minute.