The early start meant we were done brewing by 12:30... but what to do with all that extra time in the day. Brew another beer of course. I hopped on my bike and picked up some grains at Brew and Grow. Now it's time to brew some Berliner Weiss. This is an interesting recipe envolving some microorganisms other than yeastto achieve a nice refreshing tartness. There are several ways to achieve the sourness in this type of beer, but we are taking it old school with a classic sour mash.
This recipe isn't for the faint of heart, however it's pretty easy to brew. Even partial mash brewers can go all grain on this one with no major problems.
Batch size 6 gallons
Boil size 6 gallons (we aren't boiling this one really)
IBUs = <4
5lb German Pilsner
3.5lb Malted Wheat
hops: 1oz hallertau anything low alpha will work for this, old hops are fine too ;)
Yeast - European Ale
Since the grain bill is so small on this recipe, and we will be doing something odd to the mash, I am simply mashing this in an ordinary 6.5 gallon food-grade bucket.
Mash in the grains with 2.5 Gallons water @ 162F to reach a mash temp of 149, let rest 90min
I simply wrapped the bucket, with a lid on, with a sleeping bag, which will keep the temperature well.
After 90 minutes we will infuse 2.25 gallons of near boiling water to bring the temp up to 172, let rest 10 mins
Now's where it get's wierd!!!
I know open the bucket up and let it cool outside to 120F. Usually this is the danger zone for beer spoiling organisms, but it's these that will give us our sour notes in the finished beer. Once the mash is down to 120F I also throw in a handful or two of the same grains I mashed in with. The difference is that these haven't been pasteurized by the mash and are covered in nasty little critters that'll help achieve our sour mash.
Now we lay some plastic wrap right on top of the mash, to prevent to much aceto character from oxygen. I am going one step further here by putting a thermowell into the bucket and a heat wrap around it to maintain a 100F temp. You can do this at ambient room temp, but the warmer the better here for the lactic bacteria to really shine.
Now we are going to let this sit between 3-6 days. This going to turn nasty~!!! what you see and smell in this bucket may haunt you for years to come, but don't worry, the finished beer should help you recover. Taste this soup every day or so to see how sour you're getting... TASTE DON'T SMELL. Yoou may want to do this in the basement if you have loved ones you'd like to keep.
Once the soup is sour enough to your liking, we want to stop the acidification process, collect our acid wort, and of course ferment it.
Now add your hops to the mash... yeah the mash... don't question my authority! Now we are going to heat the mash to 172 again. You can do this in several kettles if you cant fit it into one. Carefully pour the mash into your lauter tun (cooler, false bottomed kettle, even a muslin bag in a bottling bucket) and sparge with about 2.5-3 gallons of water to collect you 6 gallons of wort.
At this point you can just go ahead cool the wort and pitch your yeast or bring the mixture to a brief 1 minute boil before cooling and pitching. Ferment around 67F and in a couple weeks your Berliner Weiss should be ready!
A couple of notes. There is a much easier way of doing this by pitching the un-mashed grains into the finished wort rather than souring the mash. This requires a lot less time and effort and the effects are very similar, we just wanted to try it the ole fashined way is all. You may also choose to only sour a portion of the mash/wort, then blend the two to achieve a nice balanced sour. We really like sour beer, so we are going gung ho... if it is indeed too sour we will brew another batch without the souring steps and blend them to our liking.
For some more info on sour mashing...
An excellent(and easier) Berliner Weiss recipe
Also Check out John Palmer and Jamil Zainasheff's excellent book "Brewing Classic Styles". They have a very good Berliner weiss recipe that uses a lacto culture instead of sour mashing.
Please feel free to ask us any questions.
Gross pics sure to come;)
The Pipeworks Boys