Behind the Bar
Learn the essential mechanics, flavor ratios, and service habits that make a great bartender. From perfecting your shake and stir to building drinks with speed and balance, this course gives you the core skills to step behind any bar with confidence.
Like Duolingo, but for Behind the Bar. 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 The Glass and Shaker and Flavors and the Rail. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in Behind the Bar
- Cocktails with citrus, cream, or egg whites need shaking to aerate, emulsify, and give a frothy, light texture
- Spirit-forward cocktails made purely of liquors and syrups should be stirred to maintain a crystal-clear appearance and a silky, heavy body
- Shaking introduces tiny air bubbles that make a drink look cloudy and feel frothy
- Undiluted spirits often burn the tongue with pure ethanol, masking subtle botanical or barrel flavors
- Melted ice lowers alcohol percentage to roughly 20–25%, which softens harsh burn and allows aromatic notes to bloom
- A cocktail served without planned water dilution tastes overly aggressive and unbalanced
- Large, dense ice cubes have less surface area relative to their volume, melting slowly while providing steady chilling
- Crushed or small ice melts rapidly due to high surface area, adding water much faster than desired
- Wet ice already sitting in pool water melts almost instantly when stirred, over-diluting the cocktail
- The curved back of the bar spoon must stay flush against the inner wall of the mixing glass
- Stirring is powered by a gentle push-and-pull motion of the fingers rather than stirring from the whole arm
- Keeping the spoon against the wall smoothly spins the ice column in one silent block without trapping air
- Pushing the Hawthorne strainer forward closes the gate, forcing the spring tightly against the shaker wall to block fine ice slivers
- Leaving the gate open allows tiny broken ice shards to tumble into the coupe, altering the surface texture
- A Hawthorne strainer's spring flexes and compresses depending on finger pressure against the strainer tab
- The classic sour is built on a simple balance of three parts: a base spirit, a sour component (typically lemon or lime juice), and a sweetener (typically simple syrup)
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 Behind 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 is the main reason to stir a drink made only of spirits and syrups?
Get it right to open this lesson and 11 more in the app.
How to learn Behind the Bar, step by step
Go in order. 12 short levels across 2 sections, about 24 minutes in all, five minutes a day.
- 1
The Glass and Shaker
- Shaking, Stirring, and Temperature
- The Architecture of the Sour
- 2
Flavors and the Rail
- Spirit-Forward Drinks and Aromatics
- Station Setup and Round Building
2 sections · 4 units · 12 levels. Built to play, not to enroll.
Questions about Behind the Bar
How do I learn Behind the Bar?
Go in order: start with The Glass and Shaker, then Flavors and the Rail. 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.
Is there a Duolingo-style app for Behind the Bar?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. Behind the Bar is one of its free courses, and you can type any other topic to get a course of your own.
Is the Behind the Bar course free?
Yes. Behind the Bar is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn Behind the Bar?
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.
Do I need any background to start Behind the Bar?
No. It's pitched at a beginner level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Behind the Bar is taught in 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 Behind the Bar today.
Download Tomo, search Behind the Bar, and play your first lesson in under a minute.