Amber & dark lager
Märzen
A rich amber lager brewed in March for autumn drinking, with deep toasty malt and a clean, firm finish.
- Strength
- 5.6–6.3% ABV
- Bitterness
- 18–24 IBU
- Colour
- Amber to deep copper
- Serve at
- 7–9°C
Also known as Maerzen, Marzen, Oktoberfestbier, Oktoberfest.
Pronounced MAIR-tsen.
The name records the practice it came from: brewed in March, before the summer brewing ban, and lagered in cold cellars until autumn. Stronger than everyday beer because it had to keep.
It was the Oktoberfest beer until the 1970s, when the Munich tents moved to the paler Festbier. Both remain commercially available, and the naming remains muddled.
Märzen means March, and the name records a practical constraint: before refrigeration, brewing in summer was unreliable, so a stronger beer was brewed in March and lagered in cold cellars through the summer to be drunk in autumn. That is the origin of both the style and its association with Oktoberfest.
What is served at the modern festival is mostly a paler, lighter Festbier rather than a true Märzen, which is a genuine and often-missed distinction. A proper Märzen is amber, firmly malty with toast and light caramel, and finishes drier than it smells — the dryness is what makes a litre of it possible.
Questions this page answers
- what does märzen taste like — How it tastes
- märzen abv — Measurements
- märzen food pairing — What to eat with it
- märzen serving temperature — Serving
- how long does märzen last — Freshness and storage
- styles similar to märzen — If you like this, try
- how to brew märzen — How it is made
- märzen history — How it got here
- what beer is an example of märzen — 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 | Amber to deep copper |
|---|---|
| Clarity | brilliant |
| Head | Off-white, persistent |
| Fermentation | Bottom-fermented (lager). Fermented cool with Saccharomyces pastorianus, which settles out, then conditioned cold. The cooler process suppresses yeast-derived fruitiness, leaving malt and hop character exposed. |
| Origin | Germany — Munich |
| Tradition | Bavarian lager 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 | 5.6–6.3% ABV |
| IBU | 18–24 IBU |
| Colour | Amber to deep copper — 8–17 SRM, 16–33 EBC. |
| Original gravity | 1.054–1.060 |
| Final gravity | 1.010–1.014 |
| Carbonation | 2–3 vol CO₂ |
Classified by BJCP-2021 as Märzen (exact fit); BREWERS-ASSOCIATION as German-Style Märzen (close 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 | Munich malt, Vienna malt, Pilsner malt |
|---|---|
| Yeast | German lager yeast |
Serving
| Temperature | 7–9°C |
|---|---|
| Glass | Stein, Willi Becher |
Freshness and storage
Märzen shows best within 6–12 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
- 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.
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
- Sausages
The Oktoberfest pairing. Toasty malt meets the browned sausage skin, and there is enough carbonation and clean finish to handle the fat over an evening.
- Grilled chicken
Char is the flavour here, not fat — which is what separates this from fried chicken and its answer from fried chicken’s answer. Toasted malt meets the grill marks, and the beer stays light enough not to bury a mild bird.
- Grilled lamb
Lamb fat dripping onto fire sends its own smoke back up, so the char is more pronounced than on grilled beef and the meat is more assertive underneath. Toasted malt meets both, and a Märzen has enough body to stand up without the roast bitterness that would fight the lamb’s own strength.
- Roasted squash
Roasting caramelises the squash sugars, and a Märzen brings the same toasted-caramel note from the kiln rather than the oven. The two meet on the identical chemistry, which is why the pairing reads as one flavour rather than two.
- Adobo
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.
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.
If you like this, try
Vienna lager
The lighter Austrian cousin, from the same amber-malt idea.
Suits you if: You like Märzen but want less malt intensity. Reason not to: The main shift is less malt intensity, which is a small step rather than a change of direction.
Festbier
The paler beer that replaced it at the Munich festival.
Suits you if: You like Märzen but want less caramel & toffee. Reason not to: The main shift is less caramel & toffee, which is a small step rather than a change of direction.
Czech amber lager
Same family — both are Amber & dark lager beers.
Suits you if: You like Märzen but want less dryness. Reason not to: The main shift is less dryness, which is a small step rather than a change of direction.
Bock
A stronger, darker step along the same malt-forward line.
Suits you if: You like Märzen but want more body. Reason not to: The main shift is more body, which is a small step rather than a change of direction.
Munich Dunkel
Same family — both are Amber & dark lager beers.
Suits you if: You want something very close to Märzen without simply repeating it. Reason not to: Very close to Märzen — if you were hoping for a change of direction, this is not it.
Compare with
- Märzen vs International dark lager — The main difference is bread & biscuit: Märzen has far more of it than International dark lager. Märzen also leads on dryness, malt intensity and alcohol warmth.
- Märzen vs Czech dark lager — The main difference is roast: Czech dark lager has noticeably more of it than Märzen. Märzen also leads on bread & biscuit and dryness; Czech dark lager on chocolate & cocoa.
- Märzen vs Schwarzbier — The main difference is roast: Schwarzbier has noticeably more of it than Märzen. Märzen also leads on caramel & toffee and alcohol warmth; Schwarzbier on chocolate & cocoa.
- Märzen vs Czech amber lager — The main difference is dryness: Märzen has noticeably more of it than Czech amber lager. Märzen also leads on alcohol warmth; Czech amber lager on hop spice and hop aroma.
Faults to watch for
How it got here
Bavarian regulation prohibited brewing through the summer months, because warm-weather brewing before refrigeration produced unreliable and sometimes dangerous beer. Brewers therefore made a stronger, more robust beer in March — Märzen — and stored it in cold cellars to last until autumn.
The autumn festivals where the last of it was drunk are the origin of the style’s association with Oktoberfest, an association that outlived both the brewing ban and, eventually, the beer’s presence at the festival itself.
1553 Bavaria restricts brewing to the cooler months
Regulation confining brewing to the period between autumn and spring, which produced both Märzen and the practice of lagering.
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.
- Decoction mash — Raise a mash to its next temperature step by removing part of it, boiling that portion and returning it — the traditional continental method.
- Diacetyl rest — Raise a fermentation’s temperature near its end so the yeast reabsorbs and reduces the diacetyl it produced earlier.
- Lagering — Store beer cold for an extended period after fermentation to clarify it and produce the clean, rounded character lagers are named for.
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 Decoction mash
Whether decoction mashing produces a malt character that a well-executed step mash with modern malt cannot is genuinely disputed within the trade.
— Many traditional brewers and a substantial body of brewing literature hold that boiling part of the mash develops melanoidin character that cannot be reproduced otherwise.
— Several breweries historically associated with decoction have moved to step mashing without their beers being widely reported as diminished, and blind comparisons have not established a consistent difference.
The practical justifications for decoction — hitting temperature steps without a thermometer, working with undermodified malt — have both disappeared. What remains contested is whether the flavour justification stands alone.
Genuinely contested Credible sources disagree, so both positions are given rather than one.
Sources: Technology Brewing and Malting — print; The Oxford Companion to Beer — print
On Bavarian lager brewing
Bavarian regulation restricted brewing to the cooler months for centuries, which drove the practice of brewing strong beer in March and storing it in cold cellars through summer — the origin of Märzen and of lagering itself.
Backed by a source
Sources: The Oxford Companion to Beer — print; Beer: The Story of the Pint — print
On Diacetyl
The buttery or butterscotch character described as diacetyl is 2,3-butanedione, a vicinal diketone formed outside the yeast cell by oxidative decarboxylation of alpha-acetolactate.
Backed by a source
Sources: Beer: Tap into the Art and Science of Brewing, chapter on flavour — print; Brewing: Science and Practice — print
On Diacetyl
Diacetyl has one of the lowest flavour thresholds of any beer compound, detectable by many tasters at concentrations in the region of 0.1 mg/L or below, with substantial variation between individuals.
Backed by a source
Sources: Beer: Tap into the Art and Science of Brewing — print; Technology Brewing and Malting — print
On Diacetyl
A low level of diacetyl is traditional and accepted in some Czech pale lagers and in some Yorkshire and Scottish ales, where it contributes a rounded buttery softness the brewers are not attempting to remove.
Backed by a source
Sources: Tasting Beer (2nd edition) — print; The Oxford Companion to Beer — print
On Diacetyl rest
Raising a fermentation to 16–20 °C near its end accelerates yeast reuptake and reduction of diacetyl, which is slow at lager fermentation temperatures and is interrupted entirely if the beer is crashed cold too early.
Backed by a source
Sources: Yeast: The Practical Guide to Beer Fermentation — print; Technology Brewing and Malting — print
On Diacetyl
Diacetyl reaches beer by two unrelated routes: as a normal fermentation by-product that healthy yeast subsequently reabsorbs, or from bacterial contamination — chiefly Pediococcus — which produces it continuously and cannot be rested out.
Backed by a source
Sources: Yeast: The Practical Guide to Beer Fermentation — print; Brewing: Science and Practice — print
On DMS
A low level of DMS is accepted, and by some tasters expected, in pale lagers built on pilsner malt, and only reads as a defect when it dominates.
Backed by a source
Sources: BJCP Beer Style Guidelines (2021); Tasting Beer (2nd edition) — print
On DMS
Dimethyl sulphide is generated during wort heating from S-methylmethionine, a precursor formed during germination and progressively destroyed by kilning — which is why it is highest in lightly-kilned pilsner malt and negligible in darker malts.
Backed by a source
Sources: Brewing: Science and Practice — print; Technology Brewing and Malting — print
On DMS
DMS is volatile and leaves wort as vapour during a vigorous uncovered boil, which is why covering the kettle, boiling gently or cooling the wort slowly all raise the level in finished beer.
Backed by a source
Sources: How to Brew (4th edition) — print; Brewing: Science and Practice — print
On Lagering
Carl von Linde’s mechanical refrigeration, first installed in a brewery in the early 1870s, freed lager production from dependence on natural ice and cold cellars.
Backed by a source
Sources: Beer: The Story of the Pint — print; The Oxford Companion to Beer — print
The right to describe beer as Oktoberfest beer at the Munich festival is restricted to a small number of Munich breweries under the festival’s own rules, which is a commercial designation rather than a style definition.
Backed by a source Applies in Germany. Last checked 2026-08-16.
Source: The Oxford Companion to Beer — print
On Lagering
Mechanical refrigeration from the late nineteenth century removed lager brewing’s dependence on cold cellars and natural ice, allowing it to be produced year-round and anywhere.
Backed by a source
Sources: Beer: The Story of the Pint — print; The Oxford Companion to Beer — print