Amber & dark ale
Dark mild
A low-strength dark British ale, gently sweet and nutty, built for drinking in quantity after physical work.
- Strength
- 3–3.8% ABV
- Bitterness
- 10–25 IBU
- Colour
- Deep amber to dark brown
- Serve at
- 11–13°C
Also known as mild, mild ale.
Mild was the working drink of industrial Britain and was for a long time the most-consumed beer in the country. Its decline through the twentieth century was steep, and it is now comparatively rare — which is a genuine loss, because a good mild delivers real flavour at 3.2% ABV, something very few styles manage.
"Mild" originally meant young or unaged, in contrast with matured "stale" beer, rather than low in strength or lightly hopped. The modern meaning drifted.
Mild means lightly hopped rather than weak or sweet, and that misunderstanding has done the style more damage than anything else. A good one is remarkably flavourful for its strength — chocolate, light roast and a soft finish at around 3.5% — and it is the clearest demonstration in British brewing that low alcohol need not mean thin. It is a cask beer above all, and bottled examples rarely show it properly.
Questions this page answers
- what is dark mild — Measurements
- dark mild food pairing — What to eat with it
- dark mild serving temperature — Serving
- how long does dark mild last — Freshness and storage
- is undercarbonation normal in dark mild — Characteristics that may be expected here
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 | Deep amber to dark brown |
|---|---|
| Clarity | clear |
| Head | Tan, low, soft |
| 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 |
| Tradition | British cask ale |
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 | 3–3.8% ABV |
| IBU | 10–25 IBU |
| Colour | Deep amber to dark brown — 12–25 SRM, 24–49 EBC. |
| Original gravity | 1.030–1.038 |
| Final gravity | 1.008–1.013 |
| Carbonation | 0.8–1 vol CO₂ |
Classified by BJCP-2021 as Dark Mild (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 | Mild ale malt, Crystal malt, Chocolate malt, Invert sugar |
|---|---|
| Yeast | English ale yeast |
Serving
| Temperature | 11–13°C |
|---|---|
| Glass | Nonic pint, Dimpled mug |
| 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
Dark mild shows best within 3–21 days of packaging. After that it declines in quality rather than becoming unsafe.
Drink fresh. Buy it as young as you can and drink it soon. What makes this beer worth drinking is the first thing to leave it.
- Changes quickly enough that freshness is the dominant quality variable.
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
- Kimchi
Gentle sweetness and modest strength take the edge off the chilli rather than sharpening it.
- Injera and wat
Gentle sweetness and modest strength take the edge off the chilli rather than sharpening it.
- Adobo
Deep malt character matches the savoury weight of the dish instead of sitting apart from it.
- Gyoza
Deep malt character matches the savoury weight of the dish instead of sitting apart from it.
- Ham
Deep malt character matches the savoury weight of the dish instead of sitting apart from it.
- Scallops
Deep malt character matches the savoury weight of the dish instead of sitting apart from it.
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.
- Banks’s Mild
A West Midlands mild, and one of very few surviving examples of a style that was once the default British pint.
- Sarah Hughes Dark Ruby Mild
A 6% dark mild brewed to a 1920s recipe in a restored Victorian tower brewhouse, and the beer that makes the case for the style.
- Timothy Taylor Golden Best
A pale mild — the half of the style that almost disappeared — still in production in West Yorkshire.
If you like this, try
English brown ale
A stronger, slightly drier version of the same nutty malt idea.
Suits you if: You like Dark mild but want more carbonation. Reason not to: The main shift is more carbonation, which is a small step rather than a change of direction.
Ordinary bitter
The hoppier session counterpart in the same cask tradition.
Suits you if: You like Dark mild but want more bread & biscuit. Reason not to: Noticeably more bread & biscuit than Dark mild, which not everyone wants.
Scottish ale
Same family — both are Amber & dark ale beers.
Suits you if: You like Dark mild but want more bread & biscuit. Reason not to: Noticeably more bread & biscuit than Dark mild, which not everyone wants.
London brown ale
Same family — both are Amber & dark ale beers.
Suits you if: You like Dark mild but want more sweetness. Reason not to: The main shift is more sweetness, which is a small step rather than a change of direction.
Irish red ale
Shares a fermentation style with Dark mild, so the underlying character is related.
Suits you if: You like Dark mild but want more carbonation. Reason not to: The main shift is more carbonation, which is a small step rather than a change of direction.
Compare with
- Dark mild vs London brown ale — The main difference is roast: Dark mild has a little more of it than London brown ale. Dark mild also leads on hop aroma and dryness; London brown ale on sweetness.
- Dark mild vs Ordinary bitter — The main difference is bread & biscuit: Ordinary bitter has far more of it than Dark mild. Dark mild also leads on roast and sweetness; Ordinary bitter on bitterness.
- Dark mild vs Scottish ale — The main difference is bread & biscuit: Scottish ale has far more of it than Dark mild. Dark mild also leads on roast and chocolate & cocoa; Scottish ale on body.
- Dark mild vs American brown ale — The main difference is dryness: Dark mild has noticeably more of it than American brown ale. Dark mild also leads on yeast fruitiness (esters); American brown ale on carbonation and citrus.
Characteristics that may be expected here
Each of these is treated as a fault in most beer, and in this style it can be part of the character. Intensity and context decide which: a trace that suits the style and an obvious, dominating version of the same thing are not the same finding. Follow the link where you want to work out which one you have.
Undercarbonation
Cask-conditioned British ale is deliberately low in carbonation, and sahti is essentially still. What would be flat in a pilsner is correct there. The fault is carbonation below what the style intends, not low carbonation as such.
Faults to watch for
- Oxidation — The universal ageing fault: oxygen degrades beer into papery, cardboard-like staleness, and dulls everything that made it good.
- Dirty dispense lines — Beer spoiled between keg and glass by microbial growth in the lines — a venue problem rather than a brewery one.
- Undercarbonation — Too little dissolved CO₂, leaving the beer flat and dull — carbonation carries aroma as well as providing texture.
How it got here
"Mild" originally meant unaged — fresh beer as opposed to matured stock ale — and said nothing about strength or colour. Mild was for much of the nineteenth century a strong and widely-drunk beer, and the dominant style in many British breweries.
Wartime grain restriction and gravity-based duty cut it down, and it emerged from the twentieth century as a weak dark beer associated with heavy industry. When those industries went, most of its drinkers went with them, and it is now among the most endangered British styles.
1914–1950 British beer strength collapses through two wars
Wartime restriction and gravity-based taxation drove British beer strengths down sharply, and they never returned to nineteenth-century levels.
See the whole sequence on the beer history timeline.
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.
- Open fermentation — Ferment in a vessel open to the air, allowing krausen to be skimmed and yeast to be cropped from the surface.
- Cask conditioning — Complete fermentation and carbonation inside the cask the beer will be served from, so it arrives at the drinker alive.
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.
On British cask ale
The Supply of Beer (Tied Estate) Order 1989 required any brewer with interests in more than 2,000 licensed premises to divest, stop brewing, or come within a ceiling of 2,000 premises plus half the excess above that, by 1 November 1992.
Checked against the source Applies in United Kingdom. In force from 1989-12-19. Last checked 2026-08-16.
Source: The Supply of Beer (Tied Estate) Order 1989 (SI 1989/2390), Article 2(1); Schedule, paragraph 3(1) (As made, 19 December 1989)
On British cask ale
The Beer Orders are widely held to have separated pub ownership from brewing in Britain: rather than the tied estates dispersing, large parts of them were sold into newly formed pub companies, and several national brewers left brewing altogether. How much of that the Orders caused, as against a consolidation already under way, is a matter of historical interpretation rather than an established finding.
BeerHQ’s own reading
On British cask ale
BeerHQ addresses widely-held beer myths directly rather than omitting them, because a reader who arrives holding one and finds no mention of it concludes the site simply does not cover the topic.
BeerHQ’s own reading
On British cask ale
British brewing consolidated sharply in the mid-twentieth century into a small number of national groups, which replaced cask beer with keg products across large tied estates — the change CAMRA was founded to resist.
Backed by a source
Sources: Campaign for Real Ale; Beer: The Story of the Pint — print
On British cask ale
A large share of the popular history of beer originates in brewery marketing and centenary publications rather than in independent research, which is a substantial part of why so many origin stories are both vivid and unsupported.
Backed by a source
Sources: Historical brewing log transcriptions and analysis; Beer: The Story of the Pint — print
On Undercarbonation
The prickle of a carbonated beer is a chemical sensation rather than a physical one. Dissolved CO₂ is converted to carbonic acid at the oral surface by carbonic anhydrase, and the acid stimulates trigeminal nerve endings — so the bite is felt even when no bubbles form at all.
Checked against the source
Source: Wise et al., "The Influence of Bubbles on the Perception of Carbonation Bite" (2013), abstract, and Experiment 1 results (PLoS ONE 8(8):e71488)
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 Dirty dispense lines
Cleaning a beer line on schedule does not clear it. Resilient biofilms persist through routine cleaning and re-establish the spoilage community quickly, which is why line contamination recurs rather than being solved once.
Checked against the source
Source: Bose et al., "Microbial Communities in Retail Draft Beers and the Biofilms They Produce" (2021), discussion and Importance (Microbiol Spectr 9(3):e01404-21)
On Dirty dispense lines
The organisms living in retail dispense lines are far more varied than the handful of named beer spoilers: one survey identified over a hundred contaminant bacteria and close to twenty wild yeasts across retail draft systems.
Checked against the source
Source: Bose et al., "Microbial Communities in Retail Draft Beers and the Biofilms They Produce" (2021), abstract and results (Microbiol Spectr 9(3):e01404-21)
On Dirty dispense lines
Line contamination belongs to the venue rather than to the brewery: the same organisms turn up in beers brewed at different breweries and served through the same system, which places them in the dispense equipment rather than in the kegs.
Checked against the source
Source: Bose et al., "Microbial Communities in Retail Draft Beers and the Biofilms They Produce" (2021), discussion (Microbiol Spectr 9(3):e01404-21)
On Dirty dispense lines
What line contamination does to the beer is chiefly acid and texture: the organisms found produce acetic and lactic acid, and some cause a slimy, thickened mouthfeel.
Checked against the source
Source: Bose et al., "Microbial Communities in Retail Draft Beers and the Biofilms They Produce" (2021), discussion (Microbiol Spectr 9(3):e01404-21)
"Mild" originally meant young or unaged rather than weak or dark, and described beer sold fresh in contrast to matured stock ale; the modern association with low strength and dark colour is a twentieth-century development.
Backed by a source
Sources: Historical brewing log transcriptions and analysis; Beer: The Story of the Pint — print
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