Choosing a beer these days can be tricky. IPAs, imperial stouts, red ales, blondes… the list is endless. It’s a good thing, of course, with so many new Irish and international offerings. But it can be hard knowing what to try or where to begin.

All beers fall loosely into two categories: lagers and ales. Light lagers have been the dominant beer style over the last 50 years or so, while ales have seen a massive resurgence with the recent craft beer boom. What’s the difference between an ale and a lager? Yeast.

“Lager” means “to store”, and lager yeasts are active at lower temperatures which is why the style originated in cooler climates, such as Germany.

We all know the crisp, light and golden lager; however there are many variations and colours, depending on the malts used. The clean and sweet grainy flavour of the Munich helles (light), for example, comes from Pilsner malt.

The more characterful Bohemian Pils became the template for many mainstream lagers, the archetype being the Czech Pilsner Urquel or “original”.

Ales – which include wheat beers and stouts – use yeasts which ferment at slightly warmer temperatures. While ales have a long history in Ireland and England, the craft beer movement began with the rise of the American pale ale which showcased pungent US hops with citrus and grapefruit flavours – Sierra Nevada among the first.

Cork brewers Cotton Ball do a cracking pilsner called Mayfield 5 – the perfect lager for anyone looking for an intro to craft beer scene. For a tasty light blonde ale with a summery tropical fruit zing try Pass If You Can by Hope Beer. 33 Sticke Alt by Northbound Brewing is an easy drinker, malty with a hint of bitterness, and is a hybrid lagered ale – but that's a whole other story.

beerista@irishtimes.com @ITbeerista