WSET Diploma D5 Cheatsheet: Fortified Wines
A free WSET Diploma D5 cheatsheet: Sherry, Port, Madeira, VDN and Rutherglen, organised around fortification timing, flor, solera and the ageing tiers.
D5 looks like four unrelated regions and is really one question asked five ways: when was the spirit added, and what happened to the wine afterwards. Answer those two things and sweetness, alcohol, style, colour and ageing potential all fall out of them. Every table below works back from that logic rather than listing styles as though they were arbitrary. Drill it against the D5 mock test, check the other units on the Diploma hub, and use the fortified wine guide if a category needs rebuilding from the ground up.
Fortification Timing: The One Idea That Organises the Unit
Adding spirit raises alcohol to a level yeast cannot survive, so fermentation stops at that moment. Whatever sugar is still in the must stays in the wine. That is the entire mechanism, and every style below is a decision about when to pull the trigger.
| Timing of the spirit addition | Sugar remaining | Typical finished alcohol | Styles made this way |
|---|---|---|---|
| Early in fermentation, after roughly two days | High | Around 19 to 22 per cent | Port, sweet Madeira, Vins Doux Naturels, Rutherglen Muscat, Setubal, Commandaria in some houses |
| Partway through fermentation | Medium | Around 17 to 20 per cent | Medium dry Madeira, some Marsala, sweeter Cape fortifieds |
| After fermentation has run to dryness | None to trace | Around 15 to 18 per cent | Sherry, dry Madeira, Vergine Marsala, dry Montilla styles |
| Sweetened after fortification | Added back deliberately | Varies | Cream and Pale Cream Sherry, Rivesaltes blends, most commercial Marsala |
| Spirit added to unfermented must | Very high, since fermentation never begins | Around 16 to 22 per cent | Vins de Liqueur: Pineau des Charentes, Floc de Gascogne, Macvin du Jura, Ratafia |
The second decision is what the wine is then exposed to. Kept away from oxygen it stays fruity and retains colour; deliberately exposed, in partly filled casks or under heat, it moves towards nuts, caramel, coffee and dried fruit while pale wines darken and red wines fade to tawny. Sherry is the exception that makes the rule, because a film of yeast can stand between the wine and the air.
The Spirit Itself
| Region | Spirit strength | How it changes the wine |
|---|---|---|
| Port | A grape spirit of around 77 per cent, added at roughly one part spirit to four parts fermenting must | Lower strength means a larger volume is needed, so the spirit contributes noticeably to aroma and texture; quality of the spirit is a real quality variable |
| Sherry | Grape spirit, taken to 15 to 15.5 per cent for wines destined for flor and 17 per cent and above for wines destined for oxidative ageing | The single number that decides which of the two ageing paths the wine takes |
| Madeira | A neutral grape spirit at around 96 per cent | A small volume, so the spirit stays in the background and the heating dominates the character |
| Vins Doux Naturels | Neutral grape spirit at around 96 per cent, added at a limited proportion of the must volume | Preserves the primary aroma of Muscat, or the fruit of Grenache, rather than adding character of its own |
Sherry: The Place
| Element | Detail |
|---|---|
| The triangle | Jerez de la Frontera, Sanlucar de Barrameda and El Puerto de Santa Maria in Andalucia |
| Albariza | Brilliant white, chalk rich soil that absorbs winter rain, forms a hard crust in summer that seals moisture below, and reflects sunlight back into the canopy |
| Other soils | Barros, heavier clay, and arenas, sand: both far less valued, and the best sites sit on albariza in named pagos such as Macharnudo, Balbaina, Carrascal and Anina |
| Climate | Hot, sunny and dry in summer, with the growing season saved by winter rainfall stored in the soil |
| Poniente | The humid westerly off the Atlantic, which cools the vineyards and keeps bodega humidity high enough for flor |
| Levante | The hot dry easterly out of the interior, which stresses vines and thins flor |
| Grapes | Palomino Fino for effectively all dry Sherry; Pedro Ximenez and Moscatel for sweet wines and for sweetening |
| Bodegas | Tall, thick walled, with high windows and earth floors, designed to hold cool humid air at ground level where the casks sit |
Sanlucar sits on the coast and is cooler and more humid than Jerez all year, so flor grows thicker there and does not thin as much in summer. That single climatic fact is why Manzanilla is more delicate, more saline and more consistently protected than a Fino from inland Jerez, and it is the answer to one of the most predictable questions in the unit.
Sherry: Flor and the Two Ageing Paths
Flor is a film of yeast that grows on the surface of the wine in a partly filled cask. It needs a narrow set of conditions: alcohol between roughly 15 and 15.5 per cent, since it cannot survive much above that, moderate temperature, high humidity, and access to air. It feeds on alcohol, glycerol and the remaining nutrients in the wine, and what it does to the liquid beneath it is the whole point.
- It consumes oxygen, so the wine underneath ages without oxidising: colour stays pale and the wine stays fresh.
- It produces acetaldehyde, the green apple, bruised apple and almond note that defines biological ageing.
- It consumes glycerol and acidity, so the wine gets leaner, drier and more angular over time, not richer.
- It reduces volatile acidity, which is one reason a healthy fino is so clean.
- It grows and thins with the seasons, thickest in spring and autumn, thinnest in the heat of summer and the cold of winter, so the wine is never protected uniformly.
| Path | Alcohol at fortification | Cask conditions | Result |
|---|---|---|---|
| Biological | 15 to 15.5 per cent | Butts of around 600 litres filled to roughly five sixths, leaving headspace for the flor | Pale lemon, tangy, saline, bone dry, low glycerol: Fino and Manzanilla |
| Oxidative | 17 per cent and above, which kills flor outright | The same casks, but the wine is exposed to air throughout | Deep amber to mahogany, nutty, dried fruit, higher glycerol and more viscous: Oloroso |
| Biological then oxidative | 15 to 15.5, then refortified to around 17 once the flor is allowed to die | Both in sequence | Acetaldehyde from the first phase and nuttiness from the second: Amontillado |
A Fino that is bottled after years under flor is the palest and driest wine in the unit despite being fortified, and this catches candidates out repeatedly: fortification does not imply sweetness, and dryness is the default in Jerez.
Sherry: The Solera
The criaderas and solera system is a fractional blending method, not a stack of vintages. The oldest wine sits in the solera, the scale on the floor, and successive younger scales, the criaderas, sit above it in age order. Wine is drawn from the solera for bottling in an operation called the saca, that scale is refilled from the first criadera, which is refilled from the second, and so on up to the youngest, which receives the new wine of the year.
Four consequences are worth stating in an answer. Consistency, because no bottle is a vintage and the house style is reproduced year after year. Complexity, because every bottle contains a fraction of very old wine. Flor health, because young wine carries the nutrients and alcohol that keep the film alive in a biologically aged solera. And an average age rather than a stated age, which is why the age designations below are expressed as averages and verified by the regulatory council rather than read off a cask.
Sherry: The Styles
| Style | How it is made | What it tastes like |
|---|---|---|
| Fino | Fortified to 15 to 15.5 per cent, aged entirely under flor in Jerez or El Puerto | Pale lemon, bone dry, green apple, almond, saline, light bodied |
| Manzanilla | The same process in Sanlucar, where thicker year round flor changes the result | More delicate, more markedly saline, chamomile and sea air |
| Manzanilla Pasada | A Manzanilla aged until the flor thins and a little oxidation begins | Between Manzanilla and Amontillado, with more depth and nuttiness |
| Amontillado | Biological ageing under flor, then refortification to around 17 per cent and oxidative ageing | Amber, dry, hazelnut, dried herbs, acetaldehyde still legible under the nuts |
| Palo Cortado | Classically a wine that lost its flor early or developed unusually, then aged oxidatively | The aroma of an Amontillado with the body and richness of an Oloroso; dry |
| Oloroso | Fortified to 17 per cent and above from the start, so flor never forms; aged oxidatively | Deep amber to mahogany, walnut, dried fig, leather, dry but viscous |
| Palo Cortado and Oloroso, sweetened | Blended with Pedro Ximenez or concentrated must | The Medium and Cream categories |
| Pale Cream | A pale biologically aged wine sweetened, usually with rectified concentrated must | Pale, sweet, simple, and a commercial category rather than a traditional one |
| Cream | Oloroso sweetened with Pedro Ximenez | Dark, sweet, raisined, still carrying oxidative nuttiness |
| Pedro Ximenez | Grapes sun dried on mats before pressing, then the must fortified almost immediately | Opaque, viscous, raisin, molasses and coffee, with sugar levels typically 300 to 500 grams per litre and aged examples often past 400 |
| Moscatel | Made in the same way from Moscatel | Sweet, with orange blossom and grape aroma the PX lacks |
| En rama | A Fino or Manzanilla bottled with minimal filtration | More flor character, more texture, a shorter shelf life |
Sherry: Age and Speciality Designations
| Designation | What it certifies |
|---|---|
| VOS, Vinum Optimum Signatum | An average age of at least 20 years, verified by the regulatory council |
| VORS, Vinum Optimum Rare Signatum | An average age of at least 30 years |
| Twelve and fifteen year indications | Intermediate certified average ages for the oxidative styles |
| Vino de pasto and vineyard bottlings | The modern movement towards unfortified or lightly fortified wines with a named pago on the label, reconnecting Sherry to its vineyards |
30 questions on Sherry, Port, Madeira and the VDNs, drawn from a bank of 40.
Take the D5 Mock TestPort: The Douro
| Subregion | Climate and planting | Role |
|---|---|---|
| Baixo Corgo | The westernmost, coolest and wettest of the three, and the most densely planted | Lighter, less concentrated wine; the volume base for ruby and inexpensive tawny |
| Cima Corgo | The centre, around Pinhao, hotter and drier than the Baixo Corgo | The heart of premium Port, and the source of most vintage wine |
| Douro Superior | The easternmost, hottest, driest and least planted, running towards the Spanish border | Expanding, flatter in places and more mechanisable, capable of powerful wine |
The Douro is shielded from Atlantic rain by the Serra do Marao, which is why it becomes hotter and drier the further east you travel. Soils are schist, which fractures vertically and lets roots drive deep for water. Vineyards are worked on narrow traditional terraces called socalcos, on wider bulldozed patamares that permit machinery, or on vertical rows planted up the slope, each a different trade off between labour cost, erosion and vine density.
The other structural fact is the beneficio. Every vineyard is scored on a points system covering altitude, aspect, gradient, soil, vine age, density and yield, graded from A down to F, and that grade determines how much of its crop may be turned into Port each year. The rest becomes unfortified Douro wine. It is a supply control mechanism, and it is why the finest sites are also the ones permitted to make the most Port.
Port: Making It
Fortification arrives after roughly two days on the skins, which is the constraint that shapes everything. All the colour and tannin the wine will ever have must be extracted in that window, so extraction is aggressive by design:
- Lagares, shallow granite tanks in which the fruit is trodden by foot, still the benchmark for the finest wines because treading breaks skins without crushing seeds.
- Robotic lagares, silicone paddles reproducing the treading action mechanically.
- Autovinifiers, which use the pressure of fermentation gas to push juice up and over the cap without electricity.
- Piston plungers and pumping over, the higher volume options.
The must is then run into a vessel already containing grape spirit, and the wine is settled over winter before moving to the lodges, traditionally in Vila Nova de Gaia across the river from Porto, where the cooler humid air suits long wood ageing. Ageing within the Douro is also permitted, and the warmer conditions there push a wine towards a tawny character faster.
Principal red grapes are Touriga Franca, Touriga Nacional, Tinta Roriz, Tinta Barroca and Tinto Cao, with Sousao valued for acidity and colour; white Port draws on Malvasia Fina, Gouveio, Rabigato, Viosinho and Codega. Field blends of many varieties planted together survive in the oldest vineyards.
Port: The Styles
| Style | Ageing | Character |
|---|---|---|
| Ruby | A short period in large wood or tank, then filtered and bottled | Simple, fruity, no bottle development intended |
| Reserve Ruby | Longer wood ageing from better parcels, approved by tasting | Fuller and more concentrated, still fruit driven |
| Rose | Very short maceration, then chilled and fined for colour | A modern category, pale, sweet, made to be served cold |
| White | From white grapes, dry to sweet, with lagrima the sweetest; some aged oxidatively | Nutty and honeyed when aged, simple and grapey when not |
| Late Bottled Vintage | A single year, bottled four to six years after harvest | Filtered versions are ready on release and throw no sediment; unfiltered, bottle matured versions need decanting and develop further |
| Crusted | A blend of several years, bottled unfiltered and aged in bottle | Vintage character at a lower price, and it throws a crust, so it must be decanted |
| Vintage | A declared single year, bottled between the second and third year after harvest, with all development happening in bottle | Concentrated, tannic and reductive when young; decades of development into dried fruit, spice and cedar |
| Single Quinta Vintage | The same, from one estate, usually in undeclared years | The house style in a lesser vintage, at a lower price |
| Tawny | Extended cask ageing that oxidises and fades the wine | Amber to tawny, nutty, caramel, dried fig |
| Tawny with an indication of age | Blends built to an average age, marketed at ten, twenty, thirty, forty and fifty years | The higher the indication, the more nut, caramel and volatile lift |
| Colheita | A tawny from a single harvest, with a minimum of seven years in wood and often far longer | Vintage specificity with a tawny profile, and the bottling date on the label |
| Garrafeira | Rare: a few years in wood, then many years in large glass demijohns | A distinctive character no other ageing vessel produces |
The distinction candidates fumble is bottle ageing against cask ageing. Vintage and Crusted develop reductively in glass, so they keep their deep colour and gain tertiary complexity slowly; Tawny and Colheita develop oxidatively in wood, so they lose colour, gain nuttiness, and are ready on release. Both are old wines and they do not resemble each other.
Port: The Vintage Declaration
A declaration is a commercial judgement made by each shipper independently, in the spring of the second year after the harvest, and it must be approved by the regulator. Because a declaration commits a house’s best wine to a single year and asks the market to buy it, houses declare only when quality justifies it, which historically means a few times in a decade rather than annually. Undeclared years are not necessarily poor: the fruit goes into single quinta bottlings, LBV and reserve blends.
Madeira: The Island and the Heating
| Element | Detail |
|---|---|
| Site | A subtropical Atlantic island with steep volcanic slopes, high rainfall and high humidity, worked on tiny terraces called poios |
| Fortification | Neutral grape spirit at around 96 per cent, added at the point that gives the intended sweetness |
| Estufagem | The wine is held in stainless steel tanks heated to roughly 45 to 50 degrees Celsius for a minimum of three months |
| Cuba de calor and armazem de calor | Variants using heated tanks or heated rooms, gentler than a direct estufa |
| Canteiro | No artificial heat: casks are stored in the warm upper floors of the lodges and left for years, the method used for all the finest wines |
| The result | Caramelised, nutty, and marked by high volatile acidity and searing acidity that heat cannot destroy, which is why an opened bottle survives almost indefinitely |
Estufagem is fast, cheap and slightly coarse, giving a cooked, caramel character. Canteiro is slow, expensive and far finer, and the difference is one of the most reliable comparisons the unit asks for.
Madeira: Grapes, Sweetness and Ageing Tiers
| Grape | Sweetness level | Character |
|---|---|---|
| Sercial | Dry | Highest acidity, austere, almond and citrus peel |
| Verdelho | Medium dry | Smoky, orange peel, still very fresh |
| Boal, or Bual | Medium sweet | Raisin and coffee with more weight |
| Malvasia, or Malmsey | Sweet | The richest, with toffee, dried fig and coffee, still cut by acidity |
| Terrantez | Between medium dry and medium sweet | Rare, prized, distinctively perfumed |
| Tinta Negra | Any of the four | The majority of plantings, once anonymous, now permitted on the label and capable of high quality |
| Tier | Minimum ageing |
|---|---|
| Three years old | Three years, mostly estufagem wine, often sold as dry, medium dry, medium sweet or sweet |
| Reserva, five years | Five years |
| Reserva Especial, ten years | Ten years |
| Reserva Extra, fifteen years | Fifteen years |
| Colheita or Harvest | A single year, with a minimum period in cask before bottling and the year stated |
| Frasqueira or Garrafeira | A single year with at least 20 years in cask, the pinnacle of the island |
The Vins Doux Naturels
Mutage is the French term for the same operation as Port: neutral spirit added to fermenting must so that sugar remains. The finished wines are typically around 15 to 18 per cent alcohol, and the crucial variable is what happens after fortification.
| Appellation | Grape | Ageing | Style |
|---|---|---|---|
| Muscat de Beaumes-de-Venise | Muscat Blanc a Petits Grains | Reductive, protected from air, bottled young | Grape, orange blossom, rose; pale and intensely aromatic |
| Muscat de Rivesaltes, de Frontignan, de Lunel, de Mireval, de Saint-Jean-de-Minervois | Muscat | Reductive | The same logic across the south: preserve the primary aroma at all costs |
| Muscat du Cap Corse | Muscat | Reductive | Saline edge from the Corsican coast |
| Banyuls | Grenache Noir at a minimum of 50 per cent | Either reductive or oxidative, depending on the style declared | Cherry and cocoa when young, coffee and walnut when oxidised |
| Banyuls Grand Cru | Grenache Noir at a minimum of 75 per cent | At least 30 months in wood | Deeper, more oxidative, more complex |
| Maury | Grenache Noir | Both routes available | Similar to Banyuls, from schist inland |
| Rivesaltes | Grenache Noir, Gris and Blanc, Macabeu, Malvoisie | Predominantly oxidative | The volume appellation, with real quality at the older tiers |
| Rasteau | Grenache | Both routes | The Rhone’s own VDN, made alongside dry red |
| Ageing term | What it means |
|---|---|
| Rimage or Grenat | Bottled young and protected from oxygen; deep red, fresh fruit |
| Tuile | Oxidatively aged red; brick coloured, nutty, dried fruit |
| Ambre | Oxidatively aged white; amber, with dried apricot and walnut |
| Hors d’age | A minimum of five years of ageing before release |
| Rancio | The deliberate character of long oxidative ageing, often in partly filled casks or glass bonbonnes left outdoors: nut, coffee, varnish, walnut skin |
Vins de Liqueur
Spirit added to unfermented must, so no fermentation happens at all and the sugar is the grape’s own.
| Wine | Region | Spirit used |
|---|---|---|
| Pineau des Charentes | Cognac | Cognac |
| Floc de Gascogne | Armagnac | Armagnac |
| Macvin du Jura | Jura | Marc du Jura |
| Ratafia de Champagne | Champagne | Marc or fine de Champagne |
Rutherglen Muscat and Topaque
Grapes are left on the vine well past ripeness to raisin, pressed, fortified early, and then aged oxidatively in old wood in hot sheds, with fractional blending in the manner of a solera. The heat drives concentration and rancio character rather than freshness, and evaporation makes the wines darker, thicker and sweeter with every year.
| Classification | Approximate average age | Character |
|---|---|---|
| Rutherglen Muscat | The youngest tier | Fresh raisin and rose, bright, relatively lighter |
| Classic | Older | More depth, dried fruit, developing complexity |
| Grand | Older still | Richer, more viscous, marked rancio |
| Rare | The oldest tier, blended from very old material | Extraordinarily concentrated, malt, toffee and cold tea, sipped in tiny quantities |
The grape is a red skinned Muscat Blanc a Petits Grains, known locally as Brown Muscat. Topaque, made from Muscadelle, follows the same classification ladder and gives a tea leaf and butterscotch character rather than a grapey one.
Marsala and the Rest of the Fortified World
| Wine | Where and how | Style |
|---|---|---|
| Marsala | Western Sicily, from Grillo, Catarratto and Inzolia for the gold and amber styles and red varieties for Rubino; classified by colour, by sweetness, and by ageing from Fine through Superiore, Superiore Riserva, Vergine and Vergine Stravecchio | Vergine is fortified dry and permits no sweetening; the lower grades may include concentrated or cooked must, which is why the category’s reputation and its best wines diverge so sharply |
| Montilla-Moriles | Inland Andalucia, where Pedro Ximenez ripens so far that many wines reach the required alcohol naturally and are not fortified at all; the same Fino to Oloroso style names, often aged in earthenware tinajas | A shadow of Jerez with the same architecture and lower prices |
| Malaga and Sierras de Malaga | Pedro Ximenez and Moscatel, with cooked concentrated must used for colour and sweetness, and a long ageing ladder | Sweet, raisined, sometimes intensely dark |
| Moscatel de Setubal | Portugal, where the skins are left to macerate in the fortified wine for months | Intense orange peel and grape aroma over an oxidative base |
| Commandaria | Cyprus, from sun dried Xynisteri and Mavro grown at altitude, aged oxidatively | Sweet, raisined and caramelised, with a very long documented history |
| Mavrodaphne of Patras and Muscat of Samos | Greece | Sweet, one red and oxidative, the other grapey and often reductive |
| Cape fortifieds | South Africa, centred on Calitzdorp in the Klein Karoo, using Portuguese varieties under Cape Vintage and Cape Tawny names | Close in intent to Port, with local heat pushing raisin character |
Serving, Storage and Faults
| Wine | Once opened | Why |
|---|---|---|
| Fino and Manzanilla | Days, refrigerated, treated exactly like a delicate white | No sweetness and little oxidative resistance; the flor character is the first thing lost |
| Amontillado and Oloroso | Weeks | Already oxidatively aged, so more air changes them slowly |
| Tawny and Colheita Port | Weeks | The same logic |
| Vintage Port and Crusted | Decant off the sediment and finish within a couple of days | Reductively aged, so exposure to air moves them quickly |
| Madeira | Effectively indefinite | It has already survived heat and oxidation by design |
| Fault | Cause | How it presents |
|---|---|---|
| Volatile acidity | Acetic acid bacteria in a slow ferment or a poorly kept cask | Vinegar and nail varnish; a small lift is normal in old oxidative wines, an excess is a fault |
| Poor spirit | Badly rectified spirit carrying heads and tails | Harsh, solvent, spirity heat that never integrates |
| Heat damage | Storage failure, not deliberate estufagem | Flat, stewed fruit in wines that were not made to be cooked |
| Oxidation in a reductive style | A failed cork or long storage upright | A young Vintage Port or a Rimage Banyuls tasting tired and brown |
| Cork failure in long aged bottles | Decades in bottle exhaust a cork | Seepage and oxidation, which is why old Vintage Ports are recorked |
| Refermentation | Sweet wine with viable yeast and insufficient protection | Spritz and haze in a wine that should be still |
Study This With Sommo
D5 rewards a small number of mechanisms applied consistently, and it punishes anyone who memorises style lists without the logic underneath them. Sommo turns this page into spaced repetition flashcards and typed answer drills that grade the explanation rather than the label, so the flor conditions, the fortification points and the ageing ladders stay retrievable months after you first read them. Take the full Diploma mock test to find the weak blocks, then download Sommo free and keep fortified warm alongside D1, D3 and D4.
