20250325 Westvleteren 12 Clone Beer Recipe | All Grain Belgian Dark Strong Ale | Brewer's Friend
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20250325 Westvleteren 12 Clone

315 calories 24.2 g 330 ml
Beer Stats
Method: All Grain
Style: Belgian Dark Strong Ale
Boil Time: 90 min
Batch Size: 23 liters (fermentor volume)
Pre Boil Size: 25 liters
Post Boil Size: 23 liters
Pre Boil Gravity: 1.076 (recipe based estimate)
Post Boil Gravity: 1.103 (recipe based estimate)
Efficiency: 74% (brew house)
Source: John Aitchison Maltese Falconer
Calories: 315 calories (Per 330ml)
Carbs: 24.2 g (Per 330ml)
Created: Tuesday March 25th 2025
1.103
1.014
11.7%
32.7
14.7
n/a
n/a
 
Fermentables
Amount Fermentable Cost PPG °L Bill %
0.30 kg Special B0.3 kg Special B 34 115 3.1%
8 kg United Kingdom - Golden Promise8 kg Golden Promise 37 3 82.5%
0.70 kg BE - Soft Candi Sugar - Brun Fonce - Dark Brown0.7 kg Soft Candi Sugar - Brun Fonce - Dark Brown - (late boil kettle addition) 42 27 7.2%
0.70 kg Lyle - Belgian Candi Sugar - Clear/Blond (0L)0.7 kg Belgian Candi Sugar - Clear/Blond (0L) - (late boil kettle addition) 38 0 7.2%
9.70 kg / £ 0.00
 
Hops
Amount Variety Cost Type AA Use Time IBU Bill %
20 g Charles Faram - Mosaic20 g Mosaic Hops Leaf/Whole 12 First Wort 90 min 22.5 50%
10 g Charles Faram - Mosaic10 g Mosaic Hops Pellet 12 Boil 20 min 6.37 25%
5 g Charles Faram - Mosaic5 g Mosaic Hops Pellet 12 Boil 10 min 1.91 12.5%
5 g Charles Faram - Mosaic5 g Mosaic Hops Pellet 12 Boil 10 min 1.91 12.5%
40 g / £ 0.00
 
Mash Guidelines
Amount Description Type Start Temp Target Temp Time
16 L 1st DC- protein 15 min Decoction 55 °C 49 °C 15 min
18 L 2nd DC- Beta 35 min Decoction 39 °C 64 °C 20 min
1.2 L 3rd Dc - 25 min Alpha&Beta - 2l Decoction 64 °C 66.5 °C 60 min
6.9 L 4th Decoc - Mash out - 5l Decoction 66.5 °C 72 °C 5 min
8 L Fly Sparge 72 °C 77 °C --
Starting Mash Thickness: 2 L/kg
Starting Grain Temp: 20 °C
 
Other Ingredients
Amount Name Cost Type Use Time
7 g Calcium Chloride (anhydrous) Water Agt Mash 0 min.
0.25 each Protafloc Fining Boil 10 min.
 
Yeast
White Labs - Abbey Ale Yeast WLP530
Amount:
1 Each
Cost:
Attenuation (avg):
77.5%
Flocculation:
Med-High
Optimum Temp:
19 - 22 °C
Starter:
Yes
Fermentation Temp:
23 °C
Pitch Rate:
1.25 (M cells / ml / ° P) 702 B cells required
Wyeast - Trappist High Gravity 3787
Amount:
1 Each
Cost:
Attenuation (avg):
76%
Flocculation:
Med-High
Optimum Temp:
18 - 26 °C
Starter:
Yes
Fermentation Temp:
23 °C
Pitch Rate:
1.25 (M cells / ml / ° P) 702 B cells required
Wyeast - Belgian Strong Ale 1388
Amount:
1 Each
Cost:
Attenuation (avg):
76%
Flocculation:
Low
Optimum Temp:
18 - 27 °C
Starter:
Yes
Fermentation Temp:
23 °C
Pitch Rate:
1.25 (M cells / ml / ° P) 702 B cells required
White Labs - Belgian Ale Yeast WLP550
Amount:
1 Each
Cost:
Attenuation (avg):
81.5%
Flocculation:
Medium
Optimum Temp:
20 - 26 °C
Starter:
Yes
Fermentation Temp:
23 °C
Pitch Rate:
1.25 (M cells / ml / ° P) 702 B cells required
£ 0.00 Yeast Pitch Rate and Starter Calculator
Priming
CO2 Level: 3.65 Volumes
 
Target Water Profile
London (Porter, dark ales)
Ca+2 Mg+2 Na+ Cl- SO4-2 HCO3-
100 5 35 60 50 265
Mash Chemistry and Brewing Water Calculator
 
Notes

total water = pre boil (fv 24.5x1.1)= 287+ malt losses 8.3x0-85 = 7l + mash loss 1l = 34l
34l water ph 6.75 after adding 19 ml of ams, ph 6
9g cacl added to mash

decoction vol = total mash volume × (target tenp - start temp)/( boil temp - start temp) plus 15-20%

DECOCT/ I STEP MASHED
^^^^^^^^^^^^^^^

DECOCTION MASH ESTIMATES
49 cels , 0826 15 mins (Est strike temp 50.6 cels , 8.3x2/kg=16.6l)
ACT 50.8, DECOCT STRAIGHT ADTER MASHING IN!
64 cels 0850 20 mins - (DC 8l of 100 cels, tot=11.4, left=27.1l )
ACT 66.5 (decoct after 15 mins)
65.5 cels, 0906 60 mins (add 1.2l 100 cels H2O/ DC 1.4l , tot=7l, lv=21.88l)
ACT 75 cels
72 cels 0924 , 20 mins (add 7l ,100 cels H2O, tot=9.5l, lv=18.98l)
ACT
mash out 77 cels (+ 5,5l , 100 cels H2O)
ACT


MASH IN 0826 -1034 - decoction mash as above 16.6l h20, @55cels, mash in temp 62.9, pH 5.5, eomash temp = 62

recirc 1437-1438 completely clear! That's a first!

First runnings = Hydrometer 1.106 , ph 5.5, tastes amazing
Last runnings 1.0??

Sparge start 1040, preboiling from 1040

Collection start 1035, collection end 1535 ,collected 26l, preboil gravity 1.065, pH 5.5

Boil start 1120 , vol 26l, sg 1.078 ?
Add amber/dark sugar @1600, sg 1.100
Boil end @ 1250, ph 5, sg 1.0??, 24l , tastes great!!!

Cool start 1252, end 1340, 19,1 cels , 23l

Transfer start 1358 end 1410

Transfer vol 22l, og 1.103, 20 cels
Clean up start 1415 , end 1545

W12 (22l)
25-03-2024 @1420 og 1.103, 20 cels
26-03-2024 @0630 og 1.090, 20 cels ,1.7% abv
27-03-2024 @0800 og 1.070 20 cels , 4.3% abv
28-03-2024 @0800 og 1.061 20 cels , 5.5% abv
29-03-2024 @0600 og 1.056, 20 cels, 6% abv, pitch more W12 yeast
30-03-2024 @0600 og 1.0,43 20 cels, 7.7% abv,
31-03-2024 @0600 og 1.040, 20 cels, 8.1% abv
01-04-2024 @0800 og 1.042, 20 cels, 7.9% abv
02-04-2024 @0930 og 1.036, 20 cels, 8.6% abv
03-04-2024 @0600 og 1.034, 20 cels, 8.9% abv
04-04-2024 @1400 og 1.026, 20 cels, 9.9% abv, racked 21l , 4l into bottle, 17l into keg, kept 1l in fv. So I can brew next westy 12 straight onto the yeast cake

Tastes good fg should 1.023 so only 3 sg carbonation which is more like a cask ale, pale ale carb

To achieve 3-3.2 atm priming = 3.2-0.8 (co2 in beer at 23 cels) = 2.4 atmx 1.96g/l = 4.3g/l,
15 x4.3g/l = 64.5 g to prime ***
Actual was 0g of sugar primimg


RECOMMENDED Yeast PITCHING by the Maltese Falcon:
Wyeast 3787 and White Labs WLP 530 (both Westmalle Strains) should be added right away

Wyeast 1388 (Duvel) and White Labs 550 (Le Chouffe) should be added on day 3

Slurry from bottle of Westvleteren 8 added three weeks into fermentation when gravity falls below 1.025.

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  • Last Updated: 2025-10-28 15:55 UTC
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