Food & DrinkThe PirateIntermediate
Dialing In Specialty Coffee, a free food & drink course on Tomo

Dialing In Specialty Coffee

Diagnose extraction flaws by taste and take control of brew variables. Learn how particle size, processing methods, and water chemistry transform your daily cup from dull or bitter into vibrant and balanced.

Like Duolingo, but for Dialing In Specialty Coffee. 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 Diagnosing and Controlling Extraction and Calibrating Beans and Chemistry. It assumes you already know the basics.

12 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Barnaby the Bear, the guide who teaches the Dialing In Specialty Coffee course
Dialing In Specialty Coffee
with Barnaby the Bear
12
Levels
2
Sections
5
Min/day
What you'll learn

Key ideas in Dialing In Specialty Coffee

  • Polar fruit acids and salts dissolve almost immediately in brew water.
  • Sugars and complex carbohydrates extract next to provide sweetness and body.
  • Astringent tannins and heavy plant fibers yield only after prolonged water contact.
  • Under-extraction cuts off early, leaving unbalanced tartness and no sweetness.
  • Over-extraction pulls out harsh polyphenols that cause mouth-drying astringency.
  • Balanced extraction marries initial acidity with dissolved sugars to soften the cup.
  • Under-extracted cups leave a hollow, quick finish that drops off immediately.
  • Over-extracted cups leave a sandpaper-like, lingering dryness across the palate.
  • Lingering finish tactile cues resolve confusion when intense flavors mask balance.
  • Channeling forces high flow through cracks while bypassing dense, unextracted pockets.
  • The bypassed coffee grounds contribute hollow, sharp under-extracted sourness.
  • The over-washed channel pathways yield bitter, astringent over-extracted compounds.
  • The first cup captures high acid concentrations, intense aroma, and salty density.
  • The first slice lacks dissolved sugars, making its acidity taste searing and sharp.
  • Sweetness peaks in the middle slice, while woody bitterness dominates the final slice.
  • Fines migrate downward to pack gaps and create hydraulic resistance
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 Dialing In Specialty Coffee 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.

Charting Flavor in the Cup

What dissolves right after fruit acids to give your brew sweetness and body?

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

Course map

How to learn Dialing In Specialty Coffee, step by step

Go in order. 12 short levels across 2 sections, about 24 minutes in all, five minutes a day.

  1. 1

    Diagnosing and Controlling Extraction

    • Diagnosing Extraction by Taste
    • Manipulating Flow Rate and Grind Distribution
  2. 2

    Calibrating Beans and Chemistry

    • Adapting Recipes to Bean Processing and Density
    • Harnessing Water Composition and Temperature

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

Questions

Questions about Dialing In Specialty Coffee

  1. How do I learn Dialing In Specialty Coffee?

    Go in order: start with Diagnosing and Controlling Extraction, then Calibrating Beans and Chemistry. On Tomo that's 12 short levels, about 24 minutes in all, played five minutes a day. Start free and play the first level in under a minute.

  2. Is there a Duolingo-style app for Dialing In Specialty Coffee?

    Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. Dialing In Specialty Coffee is one of its free courses, and you can type any other topic to get a course of your own.

  3. Is the Dialing In Specialty Coffee course free?

    Yes. Dialing In Specialty Coffee is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.

  4. How long does it take to learn Dialing In Specialty Coffee?

    12 levels across 2 sections, about 24 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.

  5. Do I need any background to start Dialing In Specialty Coffee?

    No. It's pitched at an intermediate level, so it starts where you are and builds up. If you can tap a phone, you can start.

New

Tomo is in ChatGPT

Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.

Add Tomo to ChatGPT
How it's taught

You pick the voice

This course
The Pirate

Dialing In Specialty Coffee is taught in the Pirate style: arr, learning be an adventure!. 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.

Keep going

More Food & Drink on Tomo

Dialing In Coffee Flavor course icon

Dialing In Coffee Flavor

Professor

Move beyond static recipes and learn how extraction actually works. Diagnose taste flaws in your cup, master the mechanical levers that fix them, and tailor your brew to different bean origins and water chemistry.

12 levels24mIntermediate
Specialty Coffee: Flavor and Extraction course icon

Specialty Coffee: Flavor and Extraction

Explain Like I'm 5

Move beyond basic recipes by mastering extraction mechanics, post-harvest processing, and origin profiles. Learn to diagnose off-flavors by taste and match your brew method to any bean.

12 levels24mIntermediate
Dialing In Great Coffee course icon

Dialing In Great Coffee

Bestie

Move beyond basic brew ratios and step into true cup control. Learn to diagnose extraction flaws, manipulate thermal and mineral variables, and read green bean processing like a roaster.

12 levels24mIntermediate
Dialing In Your Coffee course icon

Dialing In Your Coffee

Bestie

Move beyond basic brewing by learning how to diagnose extraction, adjust variables intentionally, and unlock the distinct flavor profiles hidden in specialty beans.

11 levels22mIntermediate
Dialing In Great Coffee course icon

Dialing In Great Coffee

Bestie

Step past basic brewing and learn to troubleshoot every cup like a specialty barista. Master extraction variables, train your palate to diagnose off-flavors, and demystify how bean processing and water chemistry shape your cup.

12 levels24mIntermediate
Dialing In Better Coffee course icon

Dialing In Better Coffee

Bestie

Move beyond following rigid recipes and learn how extraction mechanics shape every cup. Diagnose sour or bitter off-notes, tune your grind and flow, and brew coffee with intention.

12 levels24mIntermediate
Start free

Start Dialing In Specialty Coffee today.

Download Tomo, search Dialing In Specialty Coffee, and play your first lesson in under a minute.