After a week delay, thanks to my not-so-local homebrew shop, I brewed up another fun experiment. This time I am bringing the funk to a darker level. A stout fermented with Brettanomyces Lambicus and Lactobacillus. A stout with a beat you can dance to. Road Runner, Rebel Stout.
Ever since I took a slight step back, as I mentioned last time, brewing has become easier and even more enjoyable. This brew day was smooth even though I was introducing a new piece of equipment (an electric HLT) and the process with this beer was a little different. I hit all my numbers and had amazingly clear and quick run-off. In the boil is where this brew day was different than usual. Since the beer is intended to be partially fermented by Lactobacillus, the IBU’s from the hops would be a problem. Lactobacillus rolls over and dies at the mere mention of hops. To get around that I ran off 5 liters of beer after 15 minutes of boiling and before the first hop addition. This was then chilled and had Wyeast Lactobacillus thrown in. The rest of the wort continued to boil and receive two additions of East Kent Goldings before being chilled and pitched with a good starter of Wyeast Brettanomyces Lambicus. If my hillbilly math works out the OG should be 1.058 after blending (5 liters @ OG 1.050 + 15 liters @ OG 1.060).
One of the things I wanted to accomplish here is to see what a real lactobacillus fermentation will produce compared to the lactic acid laden Acid malt I used in the last beer. Obviously this stout will have a bunch of other flavors in the way but I still think I should be able to pick up on the complexity of the lactic character and be able to compare that aspect. We’ll see.
- beer after blending: 20 liters
- OG of total blend: 1.058
- Expected FG: 1.012??
- Expected ABV: 6.1%
- Expected IBU: 27
- Expected Color: 69.5 EBC (35 SRM)
- Boil duration: 60 minutes
- 40% Pale Ale
- 40% Munich
- 8% Aroma
- 6% Roasted Barley
- 6% Dehusked Chocolate (800 EBC)
- 30g East Kent Goldings @ 45 minutes
- 20g East Kent Goldings @ 10 minutes
- Single infusion mash @ 68°C (154°F)
- 5 liters un-hopped wort – Wyeast Lactobacillus
- 15 liters – Wyeast Brettanomyces Lambicus
Brewed on April 3, 2011
Update April 8, 2011: Despite pitching a large amount of brett L and Lacto, there was no sign of activity for the first three days. After 72 hours there was some positive pressure in the airlocks but no real sign of fermentation. Now almost 5 days later there is still no krausen and not much activity in the airlock. Getting worried.
Update May 4, 2011: pretty much right after my last update the beer really took off. That was the longest lag time I’ve had on a brett beer. Fermented nicely and the two are now blended together. The brett portion was at 1.020 but will continue to slowly come down (I expect it to stop around 1.014). The Lacto portion is not so easy to measure since the lactic acid it produces is actually denser than water so a hydrometer is useless (I should have taken pH readings before and after). The sourness developed very nicely on the nose and in taste. A bit of appley balsamic flavor with a bright crispness underneath and slight vegetal. Went well with the chocoalte notes in the beer. Tasted different ratios of the two portions but surprisingly enough 1/4 lacto portion to 3/4 brett portion tasted the best. So all 5liters of lacto portion went into the brett batch. Now the beer needs to sit a couple-few months.