Ah, but what if there were some way to achieve two different kinds of beer from one batch? Pitch two different yeasts, you say? True. But I was thinking of parti-gyle.
Floor-malted Warminster Maris Otter - which you've heard about in other posts on this blog - is in stock for the fall at Northern Brewer, and I bought what I think was the first sack we sold (I like it a lot). Add a couple days of staycation and a 1945 slurry and I was well on the way to laying in a barley wine and a bitter.
Parti-gyle brewing is an old technique of brewing successively weaker (lower-gravity) worts with the same grist. Basically it's batch-sparging but instead of blending the runnings they're kept separate. Mash and recirculate as normal, then run off to the boiler without sparging - that high-gravity wort becomes Beer Alpha. Now add more mashout-temp water and run that off into a different vessel - this is low-gravity Beer Omega. The handy parti-gyle gravity chart in The Brewer's Companion takes the guesswork out of anticipating your two divergent OGs.
My vision: a small amount of very strong, very 100% Maris Otter, golden English barley wine. Then cap the mash (another old parti-gyle technique that you can read about in Radical Brewing) with English 55L Crystal and a modicum of Pale Chocolate malt for a larger amount of a session bitter. All East Kent Goldings all the time, and NeoBritannia yeast for both.
- 20 lbs Warminster Maris Otter
|The krauesen ... the krauesen ...|
- 150 F for 75 minutes
- 3 oz EKG pellets @ 90"
- infuse w/ 170 F H20
|DSB in a quasi-open fermentation in a 10 gallon s/s stockpot. |
This is just after the first skimming
- 1 lb Simpson's Medium Crystal
- 1 oz Fawcett Pale Chocolate
- 0.5 lbs Blonde candi sugar
- 1.5 oz EKG @ 60"
- 0.5 oz EKG @ 15"
- 1 oz EKG @ shutdown
DSB fermented quasi-open in a stainless stockpot for 3 days before hitting a racking gravity of 1.014. Warminster MO + NeoBritannia = bready. Overlaid with a nice Goldings hop punch ... this one will be tasty. Skimmed the yeast and saved it for the next batch - a brown ale for fall.
As of Day 4, Old Golden still has a solid 8" of foam on the top and a fairly active airlock. NeoBritannia's nominal abv tolerance is 10%; in a few days we'll see if it can't be coaxed higher.