Food & DrinkThe StorytellerIntermediate
Precision Coffee Brewing, a free food & drink course on Tomo

Precision Coffee Brewing

Like Duolingo, but for Precision Coffee Brewing. 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: 10 levels across 2 sections, about 20 minutes end to end, roughly 4 days at five minutes a day. It moves through The Extraction Loop and The Science of the Cup. It assumes you already know the basics.

10 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Barney the Bean, the guide who teaches the Precision Coffee Brewing course
Precision Coffee Brewing
with Barney the Bean
10
Levels
2
Sections
5
Min/day
What you'll learn

Key ideas in Precision Coffee Brewing

  • Acids extract first
  • Acids dissolve most easily
  • Tannins and heavy compounds extract last
  • Sugars follow acids
  • Sweetness peaks at balance
  • Bitter plant fibers dissolve last
  • Identifying sensory markers
  • Extraction sequence
  • Changing one variable like grind size isolates the cause of flavor shifts
  • Identifying the sensory markers of extraction levels
  • Adjusting multiple factors at once makes it impossible to map results
  • A coarser grind specifically slows extraction to reduce bitterness
  • The sequential extraction of flavors in a brew
  • Strength refers to the concentration of coffee solids in the water
  • Applying the rule of isolating variables to fix a brew
  • Brew logs track the relationship between input settings and taste
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 Precision Coffee Brewing 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.

The Anatomy of a Sip

In the story of a single brew, which flavor group is the first to make an appearance?

Get it right to open this lesson and 9 more in the app.

Course map

Where Precision Coffee Brewing takes you

Move beyond the recipe and learn to 'dial in' your coffee by mastering extraction theory, water chemistry, and the mechanics of the brew bed.

  1. 1

    The Extraction Loop

    • Dialing In by Taste
    • Mastering the Grind
  2. 2

    The Science of the Cup

    • Water Chemistry and Heat
    • Managing the Brew Bed

2 sections · 4 units · 10 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Storyteller

Precision Coffee Brewing is taught in the The Storyteller style: every lesson is a story. 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.

Start free

Start Precision Coffee Brewing today.

Download Tomo, search Precision Coffee Brewing, and play your first lesson in under a minute.