Kafka's Dark Morphosis

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By Rob Gallagher

Recipe is part of Recipe Index

BJCP 2021 Style 3D - Czech Dark lager

Tmavá piva in Czech Republic are quite a varied beast, with interpretations range from dry, bitter and roasted to soft, full and sweet. This recipe is towards the latter part of the spectrum, with a full malty richness and restrained roasted bitterness.


Black Friday 2016

2nd Place - Dark Lagers

National Homebrew Competition 2019

3rd Place - Dark and Amber Lagers

Black Friday 2021

1st - Best of Show


  • IBU 23
  • ABV 5.3%
  • OG 1.052
  • FG 1.015
  • EBC 51
  • 41 litres at end of boil.
  • 35 litres into fermenter.



Reverse Osmosis water with CaCl added to give 100ppm Ca+ (153ppm Cl-)


  • Weyermann Floor malted Bohemian Pilsner, 3 EBC, 4200g, 53%
  • Weyermann Munich II, 24 EBC, 1650g, 21%
  • Weyermann Caramunich I, 90 EBC, 1600g, 21 %
  • Weyermann Carafa Special II, 817 EBC, 6 %


  • 65g Saaz (3.75%) at 60 minutes
  • 35g az at 15 minutes


Imperial Urkel yeast. Either a very large starter or, preferably, pitch straight onto the slurry from a smaller, weaker batch.



Hochkurz double decoction mash. Rests at 50°C, 62°C, 70°C & 76°C. Process as in Rossum's Utopian Rebels


60 min boil


Pitch at 9°C and allow to rise to 10°C. When fermentation starts rise to 12°C over about three days. When half attenuated rise slowly to 18°C


Keg at 2.6vols