Specialty Coffee: Flavor and Extraction
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.
Like Duolingo, but for Specialty Coffee: Flavor and Extraction. 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 Dialing In Your Cup and Selecting and Pairing Beans. It assumes you already know the basics.
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Key ideas in Specialty Coffee: Flavor and Extraction
- Fruity organic acids dissolve rapidly in early brewing before sugars extract.
- Under-extracted brews lack sweet carbohydrates to balance sharp acids.
- A thin, hollow finish signals insufficient total dissolved solids.
- Astringency is a drying tactile sensation caused by polyphenols and tannins.
- Heavy bitter compounds extract late after desirable flavors dissolve.
- Prolonged water contact washes out harsh wood fibers from spent grounds.
- Finer particles create greater total surface area for water contact.
- Coarse grounds have thick cores that slow down water penetration.
- Finer grinds dramatically accelerate the extraction of all coffee solubles.
- Lowering brew water below 90°C slows extraction of bitter roast flavors.
- Dark roasts are highly porous and yield harsh compounds very quickly.
- Cooler water preserves body while curbing pungent, burnt solubles.
- Water exploits cracks, over-extracting paths while bypassing dense pockets.
- Channeling creates muddy flavors with both under-extracted sourness and bitter bite.
- Puck fissures cause fast, uneven flow and blotchy blonde streams.
- Fresh water creates a steep concentration gradient that pulls solubles out fast.
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 Specialty Coffee: Flavor and Extraction 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.
When hot water first touches your coffee grounds, what comes rushing out first?
Get it right to open this lesson and 11 more in the app.
Where Specialty Coffee: Flavor and Extraction takes you
- 1
Dialing In Your Cup
- Diagnosing Extraction by Taste and Flow
- Controlling Extraction Across Brew Styles
- 2
Selecting and Pairing Beans
- How Post-Harvest Processing Shapes Flavor
- Matching Bean Origin to the Right Brewer
2 sections · 4 units · 12 levels. Built to play, not to enroll.
You pick the voice
Specialty Coffee: Flavor and Extraction is taught in the Explain Like I'm 5 style: no big words. promise.. 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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Dialing In Great Coffee
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.
Brewing Specialty Coffee
Learn to taste, dial in, and brew specialty coffee like a seasoned barista. Master the levers of extraction, diagnose flavor flaws, and understand what makes specialty beans unique.
Coffee Extraction and Flavor
Move beyond basic brewing by mastering extraction dynamics, sensory calibration, and origin chemistry. Learn how grind distribution, water minerals, and processing methods transform coffee from ordinary to exceptional.
Crafting Better Coffee
Bridge the gap between basic brewing and craft-level execution by mastering extraction, water chemistry, and bean diagnostics. Learn how to taste defects accurately, adjust brew parameters intentionally, and navigate coffee varieties and roasts with confidence.
Start Specialty Coffee: Flavor and Extraction today.
Download Tomo, search Specialty Coffee: Flavor and Extraction, and play your first lesson in under a minute.