Strong Scotch Ale – All Grain


General Info

Rework of original Lightning Arse to accommodate a double mash - 5 gallons of this and another 5 gallons of Saison Autome.


Brew store was out of Golden Promise. Used Maris Otter instead.

Malts and Grains

Amount Malt/Grain %
11.00 pounds British Maris Otter Pale Malt 71.8%
3.00 pounds German Light Munich Malt 19.6%
0.33 pounds Belgian Biscuit Malt 2.2%
0.25 pounds British Chocolate Malt 1.6%
0.62 pounds Crystal Malt 75L 4%
0.13 pounds Crystal Malt 20L 0.8%
15.33 pounds Total Grain Weight 100%


Amount Hop Time AA
1.25 ounces Challenger 60 min 6.7%
0.50 ounces Kent Golding 10 min 4.5%
1.75 ounces Total Hop Weight


Name Lab/Manufacturer Product ID Amount
Edinburgh Ale White Labs WLP028 1000 ml

Equipment Profile Converted Keg, 10 Gallon/38 Liter Cooler Mash Tun


Converted 15.5 gallon/59 liter keg boil kettle for full boil with a 10 gallon/38 liter cooler as a mash/lauter tun.

Mash Profile Single Infusion Mash, Medium Bodied Beer, No Mash Out


Mash profile for most well-modified malts.

Mash Steps

# Name Time Temp. Description
1 Mash In 60 min. 154°F

Add 100% of mash water at 166° F / 74° C

Water Profile Denver, Colorado


  • Make a 1000ml yeast starter at least two days in advance of brew session
  • Mash at 152-154°F for at least 60 minutes
  • 90 minute boil
  • Add hops according to schedule
  • Cool and pitch yeast
  • Ferment cool: between 64-68°F
  • Cold condition for at least two months

Fermentation and Aging

7 days @ 65° F
7 days @ 65° F
60 days @ 40° F

Lightning Arse

Date Brewed:  

Brew Day Data

  Target Actual Notes
Strike Water Amount: 5.1    
Strike Water Temperature:      
Mash Temperature(s):      
Mash Time:      
Sparge Water Amount: 3.7    
Sparge Water Temperature:      
Pre-Boil Gravity:      
Pre-Boil Amount: 5.5    
Post-Boil Amount: 5    
Boil Time: 90    
OG: 1.072 / 17.5° P    
Mash PH:      
Boil PH:      

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