One of the enjoyable things about making small batches of beer is being able to split the wort and try different ingredients. Its often difficult to discern what a certain ingredient does to a beer until you have something else to compare it too. For this batch I brewed 50L of a standard pale ale wort and the only thing I changed was the yeast. US-05 for the pale ale and Wy3726 for the Saison. The results are really interesting as the beers taste so different on so many levels. There are the obvious esters form the Farmhouse yeast however the hop aromatics are what really surprised me. Wy3726 has taken the hop compounds and transformed them into something quite different. Rather than the straight up citrus and pine which I get form the pale ale, the saison shows off a big tropical nose and you'd be forgiven for thinking that more exotic American hops were in the mix. This difference is down to what we call bio-transformation. Where by the yeast an an alcohol molecule here and and acid there and literally transform the aroma compounds from the hops into something totally new
When you have a powerful lust for fruit beers sometimes its hard to stop thinking about them. For a long time Ive been wanting to make a boysenberry beer and one sunday morning I had a fresh pitch of WY3726-PC Farmhouse yeast ready and enough malts for something new so I decided to throw it all together. In my mind I was looking for a jammy kind of saison, something sweet and not too tart, and definitely not sour. The yeast makes enough fruity esters to compliment the boysenberry but my only concern is that it would leave the beer too dry. Boysenberries are very tart and the concentrate I have from Berry Fruit is very acidic. So Ive thrown in a reasonably big mix of crystal malts to try and balance the beer. Im hoping that with a high mash temp and the added crystal the beer will finish somewhere in the 1.014 range and be just right. The grist is actually a scaled down version of one of my barley wine recipe's. The barley wine showed off some amazing dark fruit notes that would compliment the boysenberry. Its a little counterintuitive when working with a Saison yeast but what can I say, I had boysenberry jam on the brain!
As my main concern is just how tart this beer may end up, Ill keep the hopping low, just 5 IBU for the boil. The acidity can replace the bitterness to balance this beer. Im going to add the boysenberry at the beginning of fermentation so the yeast can get access to the acids and hopefully create something new. How much to use is anyones guess. I have 1 litre of concentrate which is equivalent to about 7 litres of puree so 500ml of concentrate sounds like a good place to start... We will see.
70% Galdfield Ale Malt
9% Gladfield Vienna
4% Weyermann Carabelg
4% Weyermann Caramunich II
2% Briess Special Roast
1% Thomas Fawcett Crystal Dark
5 IBU Northern Brewer at 60 minutes
Yeast Nutrients and Koppafloc at 10 minutes
Chill and add 500ml boysenberry concentrate along with 6ppm of O2
Ferment with Wy-3726-PC (1.5L starter from smack pack)
A slight throw back to summer with this one. There are few things I enjoy more than a low alcohol sour beer in summer. The addition of fresh fruit and hops is a great combo, you won't find many people that don't enjoy this style if its done well.
I must have guzzled at least 100L of Good George Kiwifruit Sour to my self over summer. It was my go to beer while out and about and it always seemed to fill either the beginning or the end of a pub session. Ive taken what I can from those many litres quaffed and made my own version that pays homage to the legends at Good George. The beauty of this style is its relatively fast and cheap to make at home! The low alcohol >4% means your grain bill is small and simple. The souring bugs abundant and easy to grow and the boil kills any bugs that might otherwise infect your equipment down the line
There are three main rules to consider for a light sour beer. Oxygen exposure, temperature and cell counts. The latter is an easy one and here's my method.
I use a handful of whole Gladfield Pilsner Malt kernels in 500ml of 1.030 starter wort. Keep this at 40 C for 24 hours. You should see a lot of bubbles and activity after this time. Then transfer the starter into 1L of fresh 1.30 wort (you can sieve out the grain at this point). After 12 hours transfer this into another 3L of wort. If you keep it at 40 C in 12 more hours you will have a raging lacto starter that will go to town on 20L of wort and it will work very quickly.
By keeping the temperature high and stepping up the starter frequently you are selecting the most thermophilic and vigorous bacteria. There is a lot of wild yeast, pedio and all sorts of other bugs on the grain but none of them are capable of reproducing as fast as Lactobacillus. I find that when I finally pitch the 4.5L starter into my batch and hold it at 40 C, it sours to a PH of 3.6 in under 7 hours and its super clean!!!
Mash and run off your wort into the boil kettle. The number one thing to avoid from here on out is oxygen. In a nut, all foul smelling things concerning bacteria are a product of oxygen exposure (acetobacter being the main culprit) so do everything in your power to remove oxygen from the wort. I like to do a quick 15 minute boil to burn out some oxygen and sanitise the wort. Then chill and hold it as close to 40 C as you can, then pitch your starter. If you have an oxygenation system (a sintered stone) you can run the wort into the kettle and blast CO2 into it at the same time stripping out oxygen, but Ive found that thoroughly purging the headspace of the kettle and then sealing the lid is sufficient to stop the foul aromas associated with aerobic bacteria. I let the PID's take control of the temperature and leave mine overnight then check the PH in the morning.
Riwaka Peach Sour
50% Gladfield Pilsner
50% Gladfield Wheat
5.2 IBU Riwaka at 60 minutes
Yeast nutrients and Koppafloc at 10 minutes
Ferment with US-05. Just before its terminal add the fruit puree and let it ferment out.
5KG of Peach Puree
3g/L Riwaka Dry Hop
Force carbonating at 15PSI for 7 days.