Say 'lager' to most people and they picture a generic pale yellow can from a global brand. Yet lager — beer fermented at cold temperatures with bottom-fermenting yeast — is one of the most nuanced and technically demanding styles to brew well. Craft lagers and pilsners are a revelation compared to the industrial versions, and they represent one of the most exciting frontiers in modern craft brewing.
What Makes a Lager?
The fundamental difference between a lager and an ale is the yeast and fermentation temperature. Ales use top-fermenting yeast at warmer temperatures (15–25°C), which produces fruity esters and complex flavours quickly. Lagers use bottom-fermenting yeast at cold temperatures (5–12°C) and require extended cold conditioning ('lagering') for weeks or months. The result is a clean, crisp, smooth beer where malt and hop character can shine without yeast-derived fruitiness getting in the way.
Because lager fermentation strips away the fruit and spice notes that ale yeast provides, lager brewers have nowhere to hide — the quality of the ingredients and the technical precision of the process are immediately apparent. A great craft lager is a genuine achievement.
The Story of Pilsner
In 1842, the city of Pilsen (Plzeň) in Bohemia produced something revolutionary: a brilliantly clear, golden, hop-forward beer made with local Saaz hops and soft water. Pilsner Urquell ('Original Pilsner Source') was born, and it changed the world. Before 1842, most beer was dark, cloudy or both. Pilsner offered clarity and gold, and with the spread of railways and refrigeration, it swept the globe.
The Czech and German styles diverged over the following decades. Czech pilsners (like Pilsner Urquell and Budvar) tend to have a fuller body, a slightly sweeter malt character and a rounded bitterness from their distinctive Saaz hops. German pilsners (Pils) are crisper, drier and more aggressively bitter, with a snappy, grassy finish.
Beyond Pilsner: More Lager Styles
The lager family is much wider than pilsner alone:
- Munich Helles — A softer, maltier, less bitter lager from Bavaria. Helles means 'bright' in German. Balanced and approachable, the everyday drinking beer of Munich.
- Märzen / Oktoberfest — Amber, malty and medium-bodied. Traditionally brewed in March (März) and lagered through summer for consumption at Oktoberfest. Rich, toasty and very drinkable.
- Dunkel — Dark lager from Bavaria. Deep amber to brown, with chocolate, bread and caramel malt character but without the roast bitterness of stouts.
- Schwarzbier — 'Black beer' from Germany. Like a Dunkel but darker and drier, with a light roast character. Smooth and surprisingly easy-drinking.
- Vienna Lager — An amber lager with a toasty malt character, originally from Vienna. Making a strong craft beer comeback.
- Kellerbier / Zwickel — Unfiltered lager with a slight haze and a fuller, fresher character. The original before filtration became standard.
Craft Lagers: A New Appreciation
For many years, craft brewers focused on ales because they were quicker and cheaper to produce. Today, the most exciting frontier in craft beer is the craft lager — brewers investing in the time, cold storage and ingredient quality needed to make lager properly. The result is beers that are enormously drinkable but with far more character than any industrial equivalent.