Gebbeth Strong Scotch

Monday, October 17th, 2011

This is a “retooling” of the Gibbous recipe which everyone was calling Gebbeth, anyway…  The most radical change was to decrease the percentage of dark malts. The new recipe conforms with the BJCP style for a strong scotch ale.

In Ursula K. Le Guin’s novel, a Gebbeth is: “a person who has been consumed and taken over by a power”.

This is a strong, dark, Scottish ale that could easily possess you if you are not careful. It’s sweetness and robust hop/smoke flavor easily hide the 7.6% alcohol content. Be careful!

BJCP Style:

9E Strong Scotch Ale


  • OG: 1.075
  • FG: 1.021
  • ABV: 7.6%
  • IBU: 32
  • Color: 15SRM (Deep copper)
  • Brew House Efficiency: 80%

Batch size:

6 gal (for 5gal bottled)


  • 14lb 2-row
  • 0.4lb Peat Smoked
  • 0.5lb Carapils
  • 0.2lb Roast barely (500L)
  • 0.5lb Flaked barely
  • 0.2lb Chocolate

Water additions:

To match Edinburgh water profile (starting with Portland water)
Add per 5 gallon of water pre-boil: (10 gal pre-boil are needed)

  • 1.5g baking soda
  • 5g chalk
  • 4.5 Epsom Salts
  • 1g gypsum
  • 1.25 table salt


  • Single infusion 152 (strike with 4.75gal at 172 if grain is 63)
  • Mash 1 hour
  • Batch/Fly Sparge
  • Collect 7 gallons pre-boil

Boil Time:

  • 90 min


  • Chinook: 0.33oz at 90min
  • Chinook: 0.33oz at 60min
  • Chinook: 0.33oz at 30 min
  • Willamette: 1oz at 15min
  • Willamette: 1oz at 0min


  • WLP028 Edinburgh Ale Yeast
  • Ferment 2+ weeks at 68+


Enter here:

^Gebbeth Strong Scotch^^39^32^6^90^9^4^80^100^8.8^0.3^0^0^0^0^70^70^14^74^74^0.4^22^22^0.5^9^9^0.2^7^7^0.5^40^40^0.2^0^0^0^0^0^0^14^14^8^0.33^90^1^2^8^0.33^60^1^2^8^0.33^30^1^2^42^1^15^1^2^42^1^0^1^2^0^0^0^0^1^2^63^152^1.2^^^^^^^^^^^^^^^^^^^^^^^^12.5^12.5^12.5^5^5^0^0.2^

Brew Log:

This was the second 12 gallon batch made this day. We hit the numbers perfectly with the first one, but not with the scotch. Our OG was just above 1.067 – meaning a 70% eff rather then the expected 80%. Most likely, this was simply due to the massive grain bill. With all the grain, my cooler/tun could not fit the requisite amount of strike water. To compensate, I over heated the water and mashed at 156, but it didn’t completely help.

Still, this should produce a 6.9% scottish ale! Not too disappointed.



3 Responses to “Gebbeth Strong Scotch”

  1. gabriel nagmay (dot com) | Archive » Scottish 60/70 shilling (small beer) Says:

    […] already brewed 24 gallons: of stout and strong scotch – we decided to use all the grain to make a small beer. Sparging more hot water over the […]

  2. nagmay Says:

    Placed 3rd in the 2012 Slurp and Burp Open for “Scottish and Irish Ale”! I will post the judges comments when they arrive.

    Notes – This was already bottled in 22’s. I had to open and transfer the beer to 12oz bottles. May have resulted in lower carbonation.

  3. gabriel nagmay (dot com) | Archive » 2012 Slurp and Burp Open Says:

    […] 9. Scottish and Irish Ale – 3rd place: Gebbeth Stong Scotch by Gabriel […]

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