(CNN) -

Seriously endowed, dirndl-straining blonde waitresses at risk of a major wardrobe malfunction ferry armloads of steins from table to table in a sloshy blur.

Manly, thigh-slapping hunks in clingy lederhosen, pound down torrents of weizen beer.

Teutonic endorphins are on parade.

This could only be summer in Bavaria.

Look at any beer ad or wander into any beer garden and you'll realize that Bavarians absolutely revel in the traditional cliches about beer and go to great lengths to live up to them.

Then there's Sister Doris.

A quiet sensation hidden behind monastery walls, she's been turning water into beer at Mallersdorf, a 12th-century abbey in the Bavarian highlands, for more than 40 years.

She's a certified master brewer.

She's also a Franciscan nun.

The local beer culture notwithstanding, Sister Doris is living proof that women are destined for a higher calling than simply serving beer and starring in Germany's retrograde beer ads.

Germany's beer scene is seriously dude-centric.

And Bavaria's is even more so.

The regional trade association doesn't have a single woman in its ranks.

'Ladies who lager'

Only a small handful of women brew beer in Bavaria.

And the notion that "women don't like beer" still holds sway.

Which is why Sister Doris is so important.

She's one of a tiny group of "ladies who lager" -- female brewmasters who are charting their own course and debunking stereotypes about women and beer.

Like many monasteries back in the day, Mallersdorf Abbey became a magnet for pilgrims seeking blessings from saints' relics on display in the abbey church.

With droves of visitors in need of sustenance and an iffy water supply from pathogen-laden streams and wells, beer was one of the few drinks that was safe in the Middle Ages.

This is why beer-making gradually became an important sideline at monasteries throughout Europe.

It flourished at Mallersdorf, as well, but was sidelined by the growth of secular breweries and not revived until 1881, when the current brew house was built.

What sets Mallersdorf apart from the handful of other surviving abbey breweries is that Sister Doris is the only remaining nun brewmaster -- in all of Europe.

On brewing day, she's excused from morning prayers and makes her way to the abbey brew house by 3:30 a.m.

Depending on the season, she can be found crafting a copper-toned vollbier (lager), a dark zoigl, a contemplative doppelbock or spritzy maibock.