Coffee: Grounds, Brews, and History
Discover how to brew great coffee at home, decode cafe menus with confidence, and trace the global journey of the humble coffee bean from ancient forests to modern cups.
Like Duolingo, but for Coffee: Grounds, Brews, and History. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Brewing Essentials and the Grind, Exploring Coffee Types and Drinks, and History and Coffee Culture. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in Coffee: Grounds, Brews, and History
- Whole beans protect volatile flavor compounds much longer than ground coffee
- Grinding exposes delicate aromatic oils to air, causing rapid flavor loss within minutes
- Grinding immediately before pouring water captures peak aroma
- Water at a full rolling boil can scald delicate coffee compounds and create harsh bitterness
- Waiting roughly 30 to 60 seconds off the boil brings water to the sweet spot for extraction
- Water that is too cool results in weak, sour coffee, while boiling water over-extracts bitter notes
- A 1:15 ratio means 1 gram of coffee for every 15 grams of water
- Ratios with far less water (like 1:10) yield overly strong or muddy brews, while 1:20 tastes thin and watery
- 1:15 provides the classic baseline balance between strength and clarity
- Adding a splash of hot water first lets trapped gas bubble out
- Letting grounds sit for about 30 seconds ensures water can evenly penetrate the bed
- The remaining water should only be poured after the gas escapes
- Cold ceramic or glass pulls heat out of the brew water instantly, dropping the extraction temperature
- A sudden drop in temperature leads to sour, under-extracted coffee flavors
- Drinking coffee from a preheated mug keeps it at the temperature where sweet flavors shine longest
- Crushing beans into smaller bits exposes vastly more total surface area to water
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 Coffee: Grounds, Brews, and History 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.
If you want to keep coffee tasting fresh on the shelf, which form lasts longer?
Get it right to open this lesson and 20 more in the app.
Where Coffee: Grounds, Brews, and History takes you
- 1
Brewing Essentials and the Grind
- Quick Wins for Better Daily Brews
- Mastering Your Coffee Grounds
- 2
Exploring Coffee Types and Drinks
- Bean Varieties and Roast Profiles
- Immersion, Drip, and Pressure Brewing
- Decoding the Cafe Menu
- 3
History and Coffee Culture
- The Global Journey of the Bean
- The Waves of Modern Coffee Culture
3 sections · 7 units · 21 levels. Built to play, not to enroll.
You pick the voice
Coffee: Grounds, Brews, and History is taught in the 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.
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How Coffee Gets Its Flavor
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Decoding the Coffee Menu
Stop guessing at the cafe and start ordering with confidence. Learn to distinguish between classic drinks, describe the flavors you actually enjoy, and master the basics of brewing a better cup at home.
Coffee: From Bean to Cup
Stop being intimidated by the coffee shop menu. Learn to identify flavors, order with confidence, and understand the journey of the bean from a tropical farm to your morning mug.
Start Coffee: Grounds, Brews, and History today.
Download Tomo, search Coffee: Grounds, Brews, and History, and play your first lesson in under a minute.