Porter & stout
English porter
The original dark British beer: chocolate and light coffee over a nutty malt base, restrained rather than aggressive.
- Strength
- 4–5.4% ABV
- Bitterness
- 18–35 IBU
- Colour
- Dark brown to black, ruby highlights
- Serve at
- 10–13°C
Also known as porter, brown porter.
Porter emerged in early eighteenth-century London and became the first beer brewed at industrial scale. Its modern form is considerably lighter than the historical one, which was aged for months in vats and carried a degree of acidity and Brettanomyces character that would now read as a fault.
Compared with stout, porter is generally softer and more chocolatey, with the roast character rounder and less sharp — though the boundary is genuinely blurred and always has been.
Porter is built on chocolate malt rather than the roasted barley of a dry stout, and that is the single distinction that matters most on the palate: chocolate malt is malted before roasting, which gives a rounder, sweeter, cocoa-like character instead of a sharp coffee bite.
Modern porter is a revival rather than a survival — the style largely disappeared in Britain during the twentieth century and was rebuilt from historical records and brewer's judgement from the 1970s onward. A good one is smooth and moderate, with the roast supporting the malt rather than dominating it, and is far more drinkable than its colour suggests.
Questions this page answers
- what does english porter taste like — How it tastes
- english porter abv — Measurements
- english porter food pairing — What to eat with it
- english porter serving temperature — Serving
- how long does english porter last — Freshness and storage
- styles similar to english porter — If you like this, try
- how to brew english porter — How it is made
- english porter history — How it got here
- what beer is an example of english porter — Beers to try
How it tastes
BeerHQ’s own comparative scale, not a measurement. Each bar is a range because a style is a span of real beers rather than one beer.
Appearance and character
| Colour | Dark brown to black, ruby highlights |
|---|---|
| Clarity | clear |
| Head | Tan, persistent |
| Fermentation | Top-fermented (ale). Fermented warm with Saccharomyces cerevisiae, which collects at the surface. Warmer fermentation produces more esters and phenols, so ales tend to carry more fruit and spice from the yeast itself. |
| Origin | United Kingdom — London (Early eighteenth century) |
| Tradition | London porter brewing |
Measurements
Conventional ranges published by style bodies, not a specification. IBU measures iso-alpha acids in a lab and does not track perceived bitterness — compare it against the sensory scale above rather than reading it as a flavour rating.
| Measurement | Typical range |
|---|---|
| ABV | 4–5.4% ABV |
| IBU | 18–35 IBU |
| Colour | Dark brown to black, ruby highlights — 20–30 SRM, 39–59 EBC. |
| Original gravity | 1.040–1.052 |
| Final gravity | 1.008–1.014 |
| Carbonation | 1–2 vol CO₂ |
Classified by BJCP-2021 as English Porter (exact fit). BeerHQ maintains its own taxonomy and records how it maps onto others rather than adopting any one of them.
What goes into it
| Malt | Maris Otter, Brown malt, Chocolate malt, Crystal malt |
|---|---|
| Yeast | English ale yeast |
| Water | London water — Moderately hard with substantial bicarbonate and low sulphate — suited to porter and brown beer rather than pale ale. |
Serving
| Temperature | 10–13°C |
|---|---|
| Glass | Nonic pint, Tulip glass |
| Dispense | Cask, hand-pulled — Beer that completes fermentation in the cask and is drawn by hand pump without added gas, served at cellar temperature. |
Freshness and storage
English porter shows best within 3–8 months of packaging. After that it declines in quality rather than becoming unsafe.
No benefit from keeping. Sound for its window and then slowly less good. Nothing bad will happen quickly, but nothing good happens either.
- Sound well past its window, but nothing in it improves with keeping. Drink it while it is fresh.
What changes with time
- Oxidation. Reaction with oxygen, producing wet cardboard and sherry notes in pale beer and dark-fruit depth in strong dark beer. Months to years, depending on packaged oxygen and temperature.
- Staling. The general, gradual loss of freshness that affects all beer, accelerated sharply by warmth. Months, and roughly twice as fast for every 10 °C warmer.
In the package
- Aluminium can — No light can reach the beer, so lightstrike is impossible in this format.
- Brown glass bottle — No format-specific concerns beyond the general advice above.
- Keg — No light can reach the beer, so lightstrike is impossible in this format.
- Cask — No light can reach the beer, so lightstrike is impossible in this format. This format admits air by design and assumes the beer will be drunk within days rather than months.
Old beer tastes worse; it does not become dangerous. Ethanol, low pH, hop compounds and the absence of oxygen make packaged beer hostile to the organisms that cause foodborne illness. The exception is a compromised package — visible mould at the closure, a pierced or rusted can, a lifted cap — which is a reason to discard the beer regardless of its age.
Guidance, not an expiry date. How a beer is stored matters more than the date printed on it, and staling roughly doubles in rate for every 10 °C. See storage and freshness for the full model.
What to eat with it
- Braised beef
A braise has almost no char and a great deal of gelatin, which is a different problem from a grilled steak: nothing needs matching for char, and something needs to stop the sauce coating the palate. Porter has the depth to meet the reduction and enough roast bitterness to keep the mouth clear.
- Mushrooms
Earthy, savoury depth on both sides. The porter’s chocolate malt picks up the browning on the mushrooms without the bitterness turning them metallic.
- Rogan josh
Kashmiri chilli supplies colour and fragrance rather than burn, so unlike most curries this one leaves room for a bigger beer. Light roast and chocolate meet the braised lamb, and the low heat means the bitterness costs nothing.
- Steak and ale pie
Chocolate and light roast in the porter echo the browned meat and the pastry crust. A slightly heavier answer than bitter, which suits the pie in winter and can overwhelm it in summer.
- Affogato
Chocolate, coffee and caramel notes in the beer are the same flavour family as the dessert, so the two read as one thing rather than two.
- Chocolate
Chocolate, coffee and caramel notes in the beer are the same flavour family as the dessert, so the two read as one thing rather than two.
Beers to try
Widely-known examples BeerHQ carries as reference points for this style. Not a recommendation list and not ranked — these are the beers that make the category concrete.
- Fuller's London Porter
A widely available modern English porter — chocolate, coffee and soft dark fruit — and a useful direct comparison against Irish dry stout.
- Samuel Smith Taddy Porter
A traditional Yorkshire-fermented English porter, drier and more austere than most modern interpretations.
- Titanic Plum Porter
A fruited English porter that turned a novelty format into a standing cask fixture.
If you like this, try
American porter
The American version, stronger and more assertively roasted.
Suits you if: You like English porter but want less dryness. Reason not to: Noticeably less dryness than English porter, which may make it feel thin by comparison.
Dry stout
A drier, sharper cousin built on roasted barley rather than chocolate malt.
Suits you if: You like English porter but want less sweetness. Reason not to: The main shift is less sweetness, which is a small step rather than a change of direction.
English brown ale
The same tradition one step back from real roast character.
Suits you if: You like English porter but want less roast. Reason not to: Noticeably less roast than English porter, which may make it feel thin by comparison.
Oatmeal stout
Same family — both are Porter & stout beers.
Suits you if: You like English porter but want more body. Reason not to: The main shift is more body, which is a small step rather than a change of direction.
Sweet stout
Same family — both are Porter & stout beers.
Suits you if: You like English porter but want less dryness. Reason not to: Noticeably less dryness than English porter, which may make it feel thin by comparison.
Compare with
- English porter vs Dry stout — English porter and Dry stout are closer than the comparison suggests. The measurable differences are small — caramel & toffee is the largest of them — so tradition, strength and what each is brewed for will tell you more than the flavour axes do.
- English porter vs Sweet stout — The main difference is dryness: English porter has noticeably more of it than Sweet stout. English porter also leads on yeast fruitiness (esters) and hop aroma; Sweet stout on sweetness.
- English porter vs Oatmeal stout — The main difference is yeast fruitiness (esters): English porter has noticeably more of it than Oatmeal stout. English porter also leads on hop aroma and caramel & toffee; Oatmeal stout on body.
- English porter vs American porter — The main difference is dryness: English porter has far more of it than American porter. English porter also leads on yeast fruitiness (esters) and nutty; American porter on citrus.
Faults to watch for
- Astringency — A drying, tannic harshness from over-extracted grain husk — the classic sign of sparging too hot, too long or at too high a pH.
- Oxidation — The universal ageing fault: oxygen degrades beer into papery, cardboard-like staleness, and dulls everything that made it good.
How it got here
Porter was the first beer brewed at industrial scale, and much of what a modern brewery is follows from it: it kept well, so it could be aged in enormous vats and sold far from where it was made, and the capital that made it profitable concentrated London brewing into a handful of very large firms.
Its character changed twice over. The introduction of black patent malt in 1817 let brewers get the colour from a small proportion of intensely roasted malt rather than from brown malt throughout, which changed both the flavour and the economics. The style then declined through the twentieth century in Britain to the point of near-extinction, and what is brewed now largely descends from its American revival.
The usual account is disputed. The familiar story — that porter was invented in 1722 by a brewer named Harwood to replicate a three-way blend called "three threads" — comes from an account written decades after the fact and is not supported by contemporary records. Historians working from brewing logs and excise records describe a gradual development of London brown beer rather than an invention.
1700–1750 Porter emerges in London
A dark, aged London beer becomes the first mass-market industrial product, though how and when it appeared is disputed.
A porter vat at the Horse Shoe Brewery failed, releasing hundreds of thousands of litres into the surrounding streets and killing several people.
1817 Daniel Wheeler patents black malt
A drum-roasting patent that let brewers produce dark beer from a mostly pale grist, changing how porter was made.
See the whole sequence on the beer history timeline.
Common misconceptions
“Porter and stout are two clearly different styles.”
The line between them has never been firm. Stout began as an adjective — stout porter meant the stronger version of the same beer — and the two only separated gradually. Modern usage is a convention rather than a definition: brewers put either word on beers that overlap in strength, colour and roast, and the Irish reading of stout differs from the English reading more than porter and stout differ from each other.
How it is made
The steps that shape this style in particular, rather than the ones every beer goes through.
- Roasting — Take malt or raw grain to high temperature in a rotating drum to produce the deep colours and roast flavours of porter, stout and dark lager.
- Infusion mash — Reach and hold a single conversion temperature by mixing grain with water at a calculated strike temperature, without further heating.
- Cask conditioning — Complete fermentation and carbonation inside the cask the beer will be served from, so it arrives at the drinker alive.
- Blending — Combine beers of different ages or batches to produce a consistent or more complex result than any single batch would give.
Questions
What is the difference between porter and stout?
Less than most people expect, and the boundary is contested. "Stout" started as an adjective meaning strong — a stout porter was a brewery’s strongest porter — and only became a separate category over the nineteenth century. In modern usage porter tends to be softer, sweeter and more chocolatey, while stout tends to be drier and sharper, often using unmalted roasted barley rather than chocolate malt. But there are stouts weaker than some porters and porters roastier than some stouts, and no single property reliably separates them.
Sensory levels are BeerHQ’s editorial abstraction, described as None–Very high on a six-point scale. Measurements are conventional style ranges. Last reviewed 2026-08-15.
Evidence
What BeerHQ knows about this, and how. Every statement carries the state of the evidence behind it rather than being presented flatly as fact.
The account that porter was invented at a single moment by one London brewer as a ready-made substitute for a three-way blend is not supported by the contemporary record.
— The traditional account credits Ralph Harwood of Shoreditch with creating "entire butt" around 1722 to replace a publican’s blend of three beers.
— Historians working from period sources find the Harwood story appearing only decades later, and describe porter instead as a gradual evolution of London brown beer, driven by aged-and-fresh blending practice and by the scale economics of large London breweries.
The Harwood attribution is repeated widely enough to be worth addressing directly rather than omitting.
Genuinely contested Credible sources disagree, so both positions are given rather than one.
Sources: Beer: The Story of the Pint — print; Historical brewing log transcriptions and analysis
On Astringency
Astringency is a tactile sensation caused by polyphenols binding salivary proteins, and is distinct from bitterness, which is a taste detected by chemoreceptors rather than felt.
Backed by a source
Sources: Beer: Tap into the Art and Science of Brewing — print; Tasting Beer (2nd edition) — print
On Astringency
Tannin extraction from grain husks rises sharply when sparge water is too hot, too alkaline or continued to very low runnings gravity, which is why brewers stop sparging at a target gravity rather than rinsing the bed dry.
Backed by a source
Sources: How to Brew (4th edition) — print; Brewing: Science and Practice — print
BeerHQ is sceptical of single-inventor and single-moment origin stories in beer, because almost every one that has been checked against contemporary records has turned out to describe a gradual commercial evolution instead.
BeerHQ’s own reading
On Cask conditioning
Cask-conditioned beer completes its fermentation in the container it is served from, retaining live yeast and residual fermentable material, and is dispensed without added carbon dioxide.
Backed by a source
Sources: Campaign for Real Ale; Institute of Brewing & Distilling technical publications
On Crystal malt
Crystal malt is produced by stewing wet germinated grain so that starch converts to sugar inside the husk, then kilning so that sugar caramelises in place — which is what distinguishes it from ordinary kilned malt.
Backed by a source
Sources: Malt: A Practical Guide from Field to Brewhouse — print; Brewing: Science and Practice — print
On Crystal malt
Crystal malt contributes sugars that brewing yeast largely cannot ferment, which is why it adds residual sweetness and body rather than alcohol.
Backed by a source
Sources: Malt: A Practical Guide from Field to Brewhouse — print; How to Brew (4th edition) — print
On Tulip glass
An inward-curving rim concentrates volatile aromatics in the headspace above the beer, which is a real and measurable effect and the only glassware mechanism with a straightforward physical basis.
Backed by a source
Sources: Tasting Beer (2nd edition) — print; Institute of Brewing & Distilling technical publications
On Oxidation
In strong dark beer the same oxidative chemistry produces sherry, port and dried-fruit character that many drinkers actively seek, which is why oxidation is a defect in a fresh pilsner and part of the appeal of an aged barley wine.
Backed by a source
Sources: Tasting Beer (2nd edition) — print; The Oxford Companion to Beer — print
On Oxidation
The wet-cardboard character of stale beer is attributed principally to trans-2-nonenal, a carbonyl formed from lipid precursors and perceptible at extremely low concentrations.
Backed by a source
Sources: Beer: Tap into the Art and Science of Brewing — print; Journal of the Institute of Brewing
On Oxidation
trans-2-Nonenal, a product of lipid peroxidation, is the compound behind the cardboard or papery flavour characteristic of stale beer.
Checked against the source
Source: Wu et al., "Identification of a Protein with Antioxidant Activity that is Important for the Protection against Beer Ageing" (2011), Introduction (Int J Mol Sci 12(9):6089–6103)
On Oxidation
Staling reactions in packaged beer are strongly temperature-dependent, with the conventional working figure being that the rate roughly doubles for every 10 °C increase in storage temperature.
Backed by a source
Sources: Beer: Tap into the Art and Science of Brewing — print; Technology Brewing and Malting — print
On Blending
London porter brewing routinely blended aged, lightly-soured stock beer with fresh beer, so a degree of Brettanomyces and lactic character was a normal part of the style rather than a fault.
Backed by a source
Sources: Historical brewing log transcriptions and analysis; Beer: The Story of the Pint — print
Porter was the first beer brewed at genuinely industrial scale, because it aged well in very large vats and could be produced in consistent quantity — which made London’s porter brewers among the largest manufacturing enterprises of their era.
Backed by a source
Sources: Beer: The Story of the Pint — print; Historical brewing log transcriptions and analysis
BeerHQ treats the porter/stout boundary as a convention rather than a fact: modern usage separates them largely by roasted barley and by dryness, and there is no point in the historical record at which a clean division appears.
BeerHQ’s own reading
Eighteenth and nineteenth-century London porter breweries matured beer in vats holding thousands of barrels, and the structural failure of one such vat at the Horse Shoe Brewery in 1814 killed several people.
Backed by a source
Sources: Beer: The Story of the Pint — print; National Brewery Heritage Trust archive