Food & DrinkThe ProfessorIntermediate
Espresso: Dialing in the Perfect Shot, a free food & drink course on Tomo

Espresso: Dialing in the Perfect Shot

Like Duolingo, but for Espresso: Dialing in the Perfect Shot. 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.

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 Texture and Maintenance. It assumes you already know the basics.

12 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Barney the Bean, the guide who teaches the Espresso: Dialing in the Perfect Shot course
Espresso: Dialing in the Perfect Shot
with Barney the Bean
12
Levels
2
Sections
5
Min/day
What you'll learn

Key ideas in Espresso: Dialing in the Perfect Shot

  • The 1:2 ratio is a baseline for balance, not a universal target for every bean
  • Finer particles create more resistance and slow down the water flow
  • Increasing the yield beyond 1:2 can help extract more sweetness from light roasts
  • Coarser grinds allow water to pass through faster, reducing contact time
  • Sourness often indicates under-extraction that a longer ratio can fix
  • Flow rate directly dictates how much flavor is stripped from the grounds
  • Applying the 1:2 ratio as a starting point rather than a fixed rule
  • Using grind size to control the speed of water flow
  • Fresh coffee produces crema which adds volume but very little actual weight
  • The 'blonde point' signals that the desirable oils have been fully extracted
  • Applying the 1:2 ratio as a starting point
  • The density of crema changes as beans age, making volume an inconsistent metric
  • Continuing the shot past the blonde point introduces watery, bitter tannins
  • Measuring mass in grams ensures the coffee-to-water ratio remains identical
  • Visual flow changes are more important than the timer for flavor balance
  • Understanding why weighing output is superior to measuring volume
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives Espresso: Dialing in the Perfect Shot 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.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Finding the Sweet Spot

If you want to increase the resistance against the water to slow down your shot, what should you do?

Get it right to open this lesson and 11 more in the app.

Course map

Where Espresso: Dialing in the Perfect Shot takes you

Move beyond the basic 'double shot' and learn to manipulate extraction variables like a professional barista. Master the art of dialing in to balance acidity, sweetness, and body in every cup.

  1. 1

    Mastering the Extraction

    • The Dial-In Workflow
    • Precision Puck Preparation
    • The Invisible Variables
  2. 2

    Texture and Maintenance

    • Microfoam and Milk Chemistry

2 sections · 4 units · 12 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Professor

Espresso: Dialing in the Perfect Shot 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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