Espresso Extraction and Service
Like Duolingo, but for Espresso Extraction and Service. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
59 levels across 8 sections, about 118 minutes end to end, roughly 24 days at five minutes a day. It moves through The Perfect Pull, Puck Physics and Preparation, Sensory Mastery, Advanced Variables, The Milk Component, Water and Chemistry, Professional Workflow, and The Science of Why. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Espresso Extraction and Service
- The 1:2 ratio means the weight of the liquid espresso should be double the weight of the dry coffee grounds.
- Using a scale to measure yield in grams provides more consistency than measuring by volume in ounces.
- Blonding occurs when the desirable oils are exhausted and the stream becomes watery and pale.
- Stopping at the blonding point prevents thin, ashy, and overly bitter flavors from entering the cup.
- Recognizing the visual transition that indicates extraction should end
- The 25-30 second window is a diagnostic tool to check if your grind size is in the right ballpark.
- Purging clears overheated water and stale coffee oils from the group head dispersion screen.
- Applying the 1:2 ratio to determine a target yield based on dose
- Flavor is the ultimate authority; a shot can be delicious even if it flows slightly faster or slower than the guideline.
- A quick flush ensures the brewing temperature is stabilized for the incoming coffee puck.
- The correct sequence for preparing the group head for a fresh shot
- Residual moisture creates a path of least resistance, leading to uneven extraction or 'channeling'.
- Understanding the relationship between time and flavor quality
- A dry basket ensures the coffee grounds adhere evenly to the walls, forcing water through the center of the puck.
- Identifying the impact of moisture on water flow through the puck
- Changing multiple settings masks which adjustment actually fixed the flavor
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 Espresso Extraction and Service 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.
Why do pro baristas prefer using a digital scale over a measuring glass with ounce lines?
Get it right to open this lesson and 58 more in the app.
Where Espresso Extraction and Service takes you
Master the science of the perfect shot, from the physics of puck resistance to the nuances of water chemistry and high-volume workflow.
- 1
The Perfect Pull
- The Quick Win Shot
- The Dial-in Feedback Loop
- Grinder Mechanics and Burr Geometry
- 2
Puck Physics and Preparation
- Distribution and Channeling
- Tamping Dynamics
- 3
Sensory Mastery
- Identifying Extraction Faults
- Roast Profiles and Espresso
- 4
Advanced Variables
- Pressure and Flow Control
- Temperature Management
- 5
The Milk Component
- Microfoam Science
- Alternative Milk Dynamics
- 6
Water and Chemistry
- The Chemistry of Extraction
- 7
Professional Workflow
- High-Volume Consistency
- Machine Anatomy and Maintenance
- 8
The Science of Why
- The Physics of Percolation
8 sections · 15 units · 59 levels. Built to play, not to enroll.
You pick the voice
Espresso Extraction and Service 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.
More Food & Drink on Tomo
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The Art of the Espresso Shot
Move beyond the button-press and master the variables that define a perfect extraction. Learn to diagnose flavors, manipulate brew ratios, and maintain professional-grade equipment.
Espresso: The Perfect Shot
Master the art of the god shot using your ECM Classika and Eureka Zero. From PID temperature management to stepless grind precision, learn to diagnose and perfect every extraction.
Espresso: Dialing in the Perfect Shot
Move beyond the basic 'push-button' espresso and learn to manipulate variables like a professional barista. Master the physics of the puck, the chemistry of water, and the sensory skills required to diagnose any shot.
The Science of the Perfect Cup
Move beyond the basics of brewing to master the chemical and physical variables that define world-class coffee. Learn to manipulate extraction, analyze complex flavor profiles, and understand the journey from terroir to the final sip.
The Home Barista's Craft
Move beyond the basic shot. Learn to manipulate extraction variables, master microfoam chemistry, and build a professional-grade cafe menu using your home setup.
Start Espresso Extraction and Service today.
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