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Coolship in the Mist

December 29, 2015 by Derek Springer 9 Comments

Coolship

Trying out my first spontaneous inoculation via coolship tonight to test out a theory of mine. My hypothesis is that many primo Lambic producers have legion of good bugs living in their barrels that cleanup any bad funk from wild critters, so why not supplement with known good bugs? My goal is local flavor and a guarantee that it will turn out interesting (and not dumpworthy).

I made an extra dark golden sour base (I threw in a couple oz of Blackprinz to get closer to a darker shade of orange which I enjoy) and I will leave it out in my garden under some lime and kumquat trees and see what critters I can attract. After a day or two I will then pitch a large portion of dregs I recently harvested from a mixed ferment I had in turn pitched from the primo dregs of my clubs’ not-to-be-confused-with Lambic project.

Here goes nothing!


Recipe Details

Batch Size Boil Time IBU SRM Est. OG Est. FG ABV
5.5 gal 90 min 10.0 IBUs 9.6 SRM 1.052 1.012 5.3 %

Fermentables

Name Amount %
Pilsner 7 lbs 66.67
Munich II 1 lbs 9.52
Oats, Flaked 1 lbs 9.52
Wheat, Flaked 1 lbs 9.52
Acid Malt 6 oz 3.57
Blackprinz 2 oz 1.19

Hops

Name Amount Time Use Form Alpha %
Aged 3 oz 60 min Boil Leaf 1

Yeast

Name Lab Attenuation Temperature
Club Dregs 80% 55°F - 80°F
Spontaneous 80% 55°F - 80°F

Mash

Step Temperature Time
Saccharification 156°F 45 min
Mash Out 174°F 10 min

Notes

* Chill to ~170ºF and transfer to igloo cooler
* Cover with cheesecloth and leave under my kumquat tree overnight.
* Transfer to carboy, pitch good dregs.

Updates

Transfer2015/12/30 – Moved wort inside at 7:30 AM (~15 hours later), temp was ~80ºF. Feeling pretty good it had a nice slow ramp between 120ºF-80ºF during the coldest part of the night. No debris in wort. Transferred to carboy (~5.75 gal) and placed in “cellar” under stairs. I’ll wait until I see some activity before pitching my dregs.

Overnight Temps

Overnight Temps

2015/12/31 – Saw increased turbidity (a sign of nascent spontaneous fermentation) on evening of 12/30 so I opted to pitch dregs and a packet of Belle Saison before bed. Woke up to slow, steady churn of active fermentation. Took a sniff: actually smells pretty good!

2016/01/03 – Fermentation has all but finished, brew smelled fruity with a dash of sulphur throughout. Now the long goodnight, see y’all in a few months!

2016/02/16 – Still mold free, great looking pellicle–“Moon Base Alpha” as I like to call it–covers the surface completely.

Pellicle

2016/04/08 – The moment of truth! Transferred the batch from the 6.5 gallon carboy into a 5 gallon carboy so I could harvest the dregs for my club’s annual big not-to-be-confused-with Lambic brew day. It is tasting real nice for such a young spontaneous-ish beer! 👌
Sample 20160408Sample stats – pH: 3.31, gravity: 1.000.
Tasting notes – Dry and refreshingly tart. Moderate mineral character and the faintest whiffs of sulphur and enteric, I imagine they’ll be completely cleaned up by the next time I sample. Bitterness is a little high and there is a moderate tannic astringency, but I imagine that will also drop out by the next time I sample. Moderate-low funky/rubbery/leathery Brett character. It is shaping up really nicely and I can’t wait to try it again in a few months!

2016/11/19 – Transferred from 5 gallon carboy to 6.5 gallon carboy on 6 lbs of Organic Dark Sweet Cherries from Costco. Sadly, tart cherries do not seem to exist in San Diego any more, but after tasting a kriek my buddy made a few months ago with these same cherries I feel confident I will still get the flavor I am looking for.
Sample stats – pH: 3.21, did not check gravity.
Tasting notes – Surprisingly seems less dry than before, the flavors are more rounded and less sharp. Acidity is right in the sweet spot where it could go a little further, but is perfectly fine where it is right now. Sulphur and enteric have faded and there’s a nice bready/figgy fruit thing going on–I think this is going to be a superb base for the cherries!

2016/11/22 – Added 32 oz of Trader Joe’s 100% Tart Cherry Juice just so I would have some tart cherry in there.

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Filed Under: Techniques Tagged With: coolship, recipe, spontaneous

Comments

  1. Dan ABA says

    December 29, 2015 at 7:40 PM

    I bet it will turn out well! I am curious how it tastes for the first 6 months and beyond. Cheers!

    Reply
  2. Malcolm says

    December 30, 2015 at 5:53 AM

    Move the cooler to the left a little. I see some bugs over there.

    Reply
  3. Malcolm says

    December 30, 2015 at 9:21 AM

    No preacidification? Wild man!

    Reply
    • Derek Springer says

      December 30, 2015 at 9:21 AM

      YOLO

      Reply
  4. Rob Coombs says

    February 16, 2016 at 5:18 PM

    This is an awesome and interesting idea! I’ll definitely be tuning in for updates. Cheers!

    Reply
    • Derek Springer says

      February 16, 2016 at 5:19 PM

      I’m *dying* to try a sample, but I know in my heart of hearts that it will only be sadness if I try it this early.

      Reply
      • Rob Coombs says

        February 16, 2016 at 5:24 PM

        It’s true, patience with sours must be one of the most difficult things to master.

        Reply
  5. growlerbull says

    March 13, 2016 at 7:38 AM

    Any updates?

    Reply
    • Derek Springer says

      March 13, 2016 at 8:08 AM

      I’m likely going to take a sample in a few weeks. Otherwise, everything seems a-ok!

      Reply

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Derek Springer

Derek Springer

I write code & brew beer--if you ask nice I'll share some with you :)

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