Espresso Craft and Extraction Science
Move beyond guesswork to dial in espresso with precision. Explore puck preparation, extraction dynamics, microfoam rheology, and the chemistry behind great beans and water.
Like Duolingo, but for Espresso Craft and Extraction Science. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
23 levels across 3 sections, about 46 minutes end to end, roughly 9 days at five minutes a day. It moves through Dialing In the Shot; Milk Physics and Beverage Balance; and Origins, Roasts, and Water Chemistry. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Espresso Craft and Extraction Science
- Yield volume dictates concentration and overall beverage strength directly
- Stopping the shot later at a higher yield dilutes heavy body and stretches flavors
- Timer duration alone does not fix concentration if total liquid yield is uncontrolled
- Shot time reveals how effectively the compressed coffee puck resisted pressurized water
- Targeting liquid weight on a scale ensures a consistent ratio regardless of flow rate
- Abruptly stopping at a set second count leaves final yield and strength unpredictable
- Finer particles expose more bean surface area to extract solids faster
- Tighter interstitial spaces between fine grounds increase resistance and slow flow
- Coarser particles reduce water contact area and widen open voids between grains
- Checking puck prep rules out localized bypass channeling before altering grind settings
- Locking dose and yield ensures that flow rate and grind become the sole moving variable
- Fine adjustments increase extraction yield systematically to convert sourness to sweetness
- Pressurized water flows fastest along paths of least resistance in low-density zones.
- Over-extracting the channeled path yields bitterness, while unextracted dense zones yield sourness.
- A visually smooth surface can still hide deep density pockets that split flow.
- Needles must start at the bottom of the basket to break clumps resting against the filter.
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 Craft and Extraction Science 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 directly controls how concentrated and heavy your espresso feels in the cup?
Get it right to open this lesson and 22 more in the app.
Where Espresso Craft and Extraction Science takes you
- 1
Dialing In the Shot
- The Core Dial-In Loop
- Puck Preparation and Channeling Dynamics
- Extraction Phases and Yield Control
- 2
Milk Physics and Beverage Balance
- Microfoam Rheology and Steaming Mechanics
- Drink Architecture and Espresso Ratios
- 3
Origins, Roasts, and Water Chemistry
- Roast Profiles and Gas Dynamics
- Processing Methods and Solubility
- Water Chemistry and Soluble Extraction
3 sections · 8 units · 23 levels. Built to play, not to enroll.
You pick the voice
Espresso Craft and Extraction Science 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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Bridge the gap between pulling basic shots and commanding the espresso bar. Master dial-in variables, diagnose extraction flaws by taste, steam silky microfoam, and understand the physics inside the portafilter.
Espresso Extraction and Service
Master the science of the perfect shot, from the physics of puck resistance to the nuances of water chemistry and high-volume workflow.
The Barista's Craft
Move beyond basic button-pressing and master the levers of espresso extraction and milk texture. Learn to diagnose flavor flaws by taste, eliminate channeling through deliberate puck prep, and steam glossy microfoam every time.
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Learn the mechanics of dialing in balanced espresso shots, steaming silky microfoam, and constructing specialty coffee shop drinks. Build the palate and technical precision of a craft barista.
Start Espresso Craft and Extraction Science today.
Download Tomo, search Espresso Craft and Extraction Science, and play your first lesson in under a minute.