What you're
actually tasting
Almost every difference between two wines traces back to three things. Learn the chain, and you can reason about a wine you've never met.
One chain explains the whole subject
Wine is fermented grape juice. That sounds reductive, but it's the most useful sentence in this course — because it means everything you taste was decided somewhere along a short, traceable chain.
Three forces, in order, account for nearly every difference between any two wines:
The grape variety sets the raw material — Cabernet Sauvignon arrives with thick skins and high tannin; Pinot Noir arrives pale and delicate. Place — chiefly climate — decides how ripe that fruit gets and how much acid it keeps. And the cellar is where a human makes choices: skin time, oak, whether to stop fermentation early to leave sweetness.
You don't memorize wines one at a time. You learn the chain, then reason: cool place + thin-skinned grape + no oak predicts a light, tart, unoaked red before you taste a drop. That predictive habit is the entire skill.
How the liquid gets made
Fermentation is the engine: yeast eats the sugar in grape juice and excretes alcohol and CO₂. Let it run to completion and you get a dry wine. Stop it early and the leftover sugar makes the wine sweet. That single decision is where sweetness comes from; it is not added.
White, red, rosé — one variable
The difference is mostly skin contact. White is pressed off its skins before fermenting. Red ferments with the skins — the source of its color and tannin. Rosé is red grapes given a few hours of skin contact: enough for a blush, not enough for grip.
Then: maturation
After fermenting, wine rests — in inert steel (which preserves fresh, primary fruit) or in oak barrels (which add texture and notes of vanilla, baking spice, toast). Oak time is a cost and a stylistic choice, and one of the biggest reasons two Chardonnays can taste nothing alike.
Four styles are just this process, modified. Sparkling: trap CO₂ from a second fermentation. Fortified: add grape spirit, locking in strength. Sweet: concentrate sugar or stop fermentation early. Skin-contact "orange": white grapes made like reds. You'll meet each later — they're settings, not exceptions.
The five structural components
Flavor is the part everyone talks about and the part that matters least for identifying a wine. Structure is what a trained taster reads first — five measurable sensations, each on a scale.
1 · Sweetness — the sugar that's left
A faint syrupy roundness, usually on the tip of the tongue. Runs dry → off-dry → medium-dry → medium-sweet → sweet. Don't confuse it with ripe-fruit flavor: a bone-dry wine can smell intensely of fruit and hold no sugar. That confusion is the most common beginner error.
2 · Acidity — the freshness axis
The tartness that makes your mouth water. The backbone of freshness and the best climate-tell: cool climates keep high acid, warm climates lose it. Low-acid tastes flabby; high-acid tastes crisp.
3 · Tannin — grip, in reds
Not a taste but a texture: the drying, furry grip of over-steeped tea. From skins, seeds, and oak — so it lives almost entirely in reds. High tannin feels firm and astringent, and lets a red age.
4 · Alcohol — warmth
Gentle heat at the back of the throat and weight on the palate. Rises with grape ripeness, so it tracks climate too. Most still wine sits between 11% and 15%.
5 · Body — the overall weight
The sum of the above: how heavy the wine feels. The reliable analogy is milk — light-bodied is skim, full-bodied is cream.
Primary flavors come from grape and fermentation (fruit, flowers, herbs). Secondary from winemaking — oak, a buttery note from malolactic conversion, a bready note from time on the spent yeast (lees). Tertiary from age (dried fruit, nuts, leather). Finish is how long the sensation lasts; length is a core quality marker.
Your instrument
The tool you'll use in every tasting — the same scales the WSET exam grades. Click a value on each axis; the brass marker is your reading.
Guided first taste
Pour any wine. The goal isn't to like it — it's to locate the five components. Use the instrument above as you go.
Look
Tilt the glass over something white. Note the color and its depth — plainly: pale lemon? deep ruby? (Session 2 turns this into data.)
Smell — twice
A short sniff, then swirl and return. Name whatever you get in plain words — citrus, cherry, vanilla, grass.
Taste for structure, not flavor
A real mouthful. Hunt the five: mouth-watering (acid)? drying grip (tannin)? throat warmth (alcohol)? sugar? overall weight (body)? Set each.
Wait
Swallow and count the seconds the flavor lasts. Under 10 short; past 20 long. That's the finish.
Log it
Record below. You'll build a library — that's how your palate calibrates.
Record & export the note
Your structure reading is pulled in from the instrument. Notes are saved on your device when possible; export anything you want to keep regardless.
Five questions
Answer before revealing. The explanation matters more than the score.
Term flashcards
Tap to flip. Define each before flipping.
Lock it in
Active recall, not re-reading. Cover the screen and do these from memory:
- Name the three links in the chain, in order, and one thing each contributes.
- List the five structural components — where each comes from and how it feels.
- Explain the sweetness-vs-fruit error in your own words.
- Re-taste your wine after 20 minutes warmer. Did acid, alcohol, or body seem to shift?
- Re-run the quiz until it's instant.
A method,
not a vibe
The Systematic Approach to Tasting turns a subjective experience into a repeatable grid — the same one the exam grades. This session you learn to read color, and to tell medium+ from high.
Why a grid beats an opinion
"I liked it" tells no one anything. The Systematic Approach to Tasting — the SAT — forces every wine through the same four stages in the same order, so two tasters mean the same thing by the same word, and so you can't skip the parts you find hard.
The four stages, always in this sequence:
Appearance → Nose → Palate → Conclusions
Appearance: clarity, intensity (how deep the color), and the color itself. Nose: condition (is it clean or faulty?), intensity, the aromas, and development (young or aged?). Palate: the structural scales from Session 1 — sweetness, acidity, tannin, alcohol, body — plus flavor intensity, the flavors themselves, and finish. Conclusions: a quality judgment and a readiness-to-drink call.
The discipline that makes it work: write the note before you look at the label. The label is a spoiler. Naming the structure blind is the only way to find out whether you can actually read a wine or are just reciting what the bottle told you.
Color is data
Appearance feels decorative. It isn't. Color reliably narrows age, and hints at climate and winemaking before you've smelled a thing. Both whites and reds move along a predictable track as they age — but in opposite directions.
Two rules do most of the work: whites darken with age and oak (lemon-green → lemon → gold → amber → brown), while reds lighten and brown with age (purple → ruby → garnet → tawny). A deeply colored red also suggests a thick-skinned grape from a warm place; a pale one suggests a thin-skinned grape from somewhere cool. You'll lean on this constantly from Block B on.
Calibration: telling the levels apart
Anyone can say "it's acidic." The skill is placing it: medium, medium+, or high? Calibration means anchoring each scale to a physical reference so your "high" matches everyone else's.
Acidity — time the salivation
After you swallow, count how long and how hard your mouth waters. A brief trickle is medium; a sharp, lasting flood is high. Anchor the poles at home: a sip of water (low) and a sip of lemon juice (high). Everything real sits between.
Tannin — locate the grip
Notice where it dries you and how coarse it feels. Gums and front teeth, fine and quick = lower. Whole mouth, cheeks, lingering and chalky = high. Cold over-steeped tea is your high-tannin reference.
Body — how far it coats
Hold the wine, then swallow. Does it feel like skim milk (light), whole milk (medium), or cream (full)? Alcohol and sugar push the weight up; acid pulls it down.
The "medium-plus" habit
The exam rewards a fifth tick between medium and high — medium+ — and most real wine lives in that crowded middle. Train yourself to commit to it rather than defaulting to "medium" for everything. Now build a full note on a real wine:
Calibration flight
Two wines, side by side, to feel the poles of each scale. A crisp unoaked white (Sauvignon Blanc or Pinot Grigio) and a soft warm-climate red (Merlot or Garnacha) work well.
Appearance, both
Rank them on the color scale above. The white is probably pale lemon; note whether the red reads more purple (young) or garnet (older).
Acid: white vs. red
Taste the white, then the red. The white's higher acid is your anchor for "high"; the red's softer acid anchors "medium" or below. Feel the difference, don't guess it.
Tannin: red only
The white has none — that's your zero. Whatever grip the red has, place it against the over-steeped-tea reference.
Body: feel the gap
The white likely sits light–medium, the red medium–full. Holding both in memory is how the scale becomes real.
Write one full note
Pick the wine you find harder to read and complete the SAT builder, blind to the label if you can.
Record & export
Pulls your full reading from the builder. Saved on-device when possible.
Five questions
SAT flashcards
Lock it in
From memory:
- Recite the four SAT stages in order and what each assesses.
- Which way do whites move with age? Which way do reds move? Why opposite?
- Give the physical anchor for high acidity and for high tannin.
- Re-taste yesterday's leftover wine: has the color or structure shifted overnight?
- Write one more full SAT note, faster this time — aim under four minutes.
The white
grapes
Six varieties carry most of the world's white wine. Learn each as a structure-plus-aroma fingerprint, and you can name a white blind more often than not.
Two axes sort almost every white
Before the names, two questions place a white wine most of the way to an identification.
Aromatic, or neutral?
Aromatic grapes shout — you can name the smell across the room (Sauvignon Blanc, Riesling, Gewürztraminer). Neutral grapes whisper, taking their character from place and winemaking instead (Chardonnay, Pinot Grigio). A loud, distinctive nose points you straight at the aromatic camp.
Oaked, or unoaked?
Oak adds color (deeper lemon/gold), texture (rounder, fuller), and aromas of vanilla, toast, sometimes butter. An unoaked white is paler, leaner, and tastes of fruit alone. Chardonnay is the grape where this fork matters most: the same grape gives steely Chablis and rich, buttery Napa.
Aromatic + high acid + unoaked, smelling of lime and green apple → think Riesling or Sauvignon Blanc. Neutral + full body + vanilla → oaked Chardonnay. You're running Session 1's chain backwards from the glass.
The major whites, as fingerprints
Click any grape to see its structure profile, signature aromas, the regions that define it, and the one-line tell that gives it away. The mini-bars use the same scale you've been setting all along.
Two-glass identification
If you have an unoaked and an oaked white, taste them blind against the cards above.
Loud or quiet?
Smell both. Decide aromatic vs. neutral before anything else. That alone halves the field.
Acid check
High, racy acid favors Sauvignon Blanc or Riesling. Softer acid with body favors Chardonnay or Viognier.
Oak check
Vanilla/toast and a rounder, fuller feel = oak = most likely Chardonnay. Pure fruit and leanness = unoaked.
Name it, then check
Commit to a grape out loud, then look at the label. Being wrong with a reason beats being right by luck — note which clue misled you.
Five questions
Grape flashcards
Front: the tell. Back: the grape and why.
Lock it in
From memory:
- Sort the six major whites into aromatic vs. neutral.
- Name the one grape where the oaked/unoaked fork matters most, and the two regions at its extremes.
- Give the signature aroma tell for Sauvignon Blanc, Riesling, and Gewürztraminer.
- Which white can range from bone-dry to lusciously sweet — and why does climate let it?
- Re-run the grape cards; cover the profile and recall it before clicking.