The Craft of the Bar
Discover the shared fundamentals behind exceptional coffee and crafted cocktails. Learn how to balance flavors, manipulate temperature and texture, and work the rail with confidence.
Like Duolingo, but for The Craft of the Bar. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
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 Flavor and Fluid Mechanics and Technique and Service. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in The Craft of the Bar
- A base spirit or concentrated brew provides the body and core flavor of the drink
- Acid from citrus or bitterness from tonic offsets heaviness and keeps the drink refreshing
- Sweeteners like syrups soften sharp edges and tie the base and acid together
- Eyeballing pours leads to shifting ratios that change how sweet or sour a drink tastes from one order to the next
- Tools like jiggers and scales lock in a precise spec so every customer receives an identical drink
- A darker roast or a tighter espresso extraction delivers pleasant bitterness that cuts through dairy fat
- Bitterness provides a crisp finish so a rich beverage does not linger unpleasantly on the tongue
- Tasting with a bar spoon or straw before serving lets you detect imbalances without wasting a finished drink
- A flat or syrupy profile signals a lack of acid or brightness to lift the sweetness
- Baristas use water as a solvent that pulls flavor compounds out of coffee grounds
- Bartenders treat meltwater from ice as a deliberate mixer that softens proof and opens aromas
- Water volume directly dictates whether a drink tastes concentrated and punchy or light and mild
- Water washes out sour, bright fruit acids almost immediately at the start of a brew
- Sugars and aromatic oils follow in the middle of the brew to add sweetness and body
- Shaking introduces rapid melt that adds roughly twenty percent water to blunt harsh spirit burn
- Stirring limits meltwater to preserve a rich, viscous mouthfeel in pure-spirit drinks
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 The Craft of the Bar 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.
What role does citrus juice or tonic water play when building a drink?
Get it right to open this lesson and 9 more in the app.
Where The Craft of the Bar takes you
- 1
Flavor and Fluid Mechanics
- Ratios and Balance: Sweet, Sour, and Bitter
- Extraction and Dilution: The Role of Water
- 2
Technique and Service
- Texture, Aeration, and Temperature
- Station Flow and the Speed of Service
2 sections · 4 units · 10 levels. Built to play, not to enroll.
You pick the voice
The Craft of the Bar 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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Start The Craft of the Bar today.
Download Tomo, search The Craft of the Bar, and play your first lesson in under a minute.