Recipe Type: All Grain
Yeast: WLP530
Yeast Starter: 3.8L stirplate
Batch Size (Gallons): 5.5
Original Gravity: 1.090
Final Gravity: 1.012
IBU: 35
Boiling Time (Minutes): 90
Color: 33
Primary Fermentation (# of Days & Temp): 5 @ 83
Additional Fermentation: 60 @ 50
Secondary Fermentation (# of Days & Temp): 2 @ 65
Tasting Notes: see thread

I have gotten a few PMs from people who followed the two Westvleteren 12 threads I did regarding trying to clone this recipe and a competition with the other people who were in on it so I'm posting up my notes.

There are two ways of making this, a "New World" recipe that uses specialty malts, and a "Traditional" recipe that goes by the way Westvleteren has been making it for a while with just two basemalts and sugar.

The Pious New World - Took 1st place & BOS in the Westvleteren 12 clone comp with 43 points beating out a real Westvleteren 12 with 40 points.

Recipe Specifications
--------------------------
Batch Size: 5.50 gal
Boil Size: 7.54 gal
Estimated OG: 1.090 SG
Estimated Color: 26.6 SRM
Estimated IBU: 38.2 IBU
Brewhouse Efficiency: 75.00 %
Boil Time: 90 Minutes

Ingredients:
------------
Amount Item Type % or IBU
13.50 lb Pilsner (2 Row) Bel (2.0 SRM) Grain 74.71 %
1.00 lb Caramunich Malt (56.0 SRM) Grain 5.53 %
0.50 lb Biscuit Malt (23.0 SRM) Grain 2.77 %
0.33 lb Aromatic Malt (26.0 SRM) Grain 1.83 %
0.25 lb Special B Malt (180.0 SRM) Grain 1.38 %
0.19 lb Chocolate Malt (350.0 SRM) Grain 1.05 %
1.00 oz Northern Brewer [8.50 %] (90 min) Hops 24.7 IBU
1.00 oz Hallertauer Hersbrucker [2.40 %] (30 min)Hops 5.0 IBU
1.00 oz Styrian Goldings [4.10 %] (30 min) Hops 8.5 IBU
1.00 item Servomyces (10 min)
1.50 lb Dark Belgian Candi Syrup (80.0 SRM) Sugar 8.30 %
0.75 lb Amber Belgian Candi Syrup (40.0 SRM) Sugar 4.43 %
1 Pkgs Abbey Ale (White Labs #WLP530) Yeast-Ale


Mash Schedule: Single Infusion, Light Body
Total Grain Weight: 15.77 lb
----------------------------
Single Infusion, Light Body
Step Time Name Description Step Temp
90 min Mash In Add 24.00 qt of water at 159.3 F 150.0 F


The Pious Traditional - I like this better than the New World.

Recipe Specifications
--------------------------
Batch Size: 5.50 gal
Boil Size: 8.27 gal
Estimated OG: 1.092 SG
Estimated Color: 33.8 SRM
Estimated IBU: 35.2 IBU
Brewhouse Efficiency: 70.00 %
Boil Time: 90 Minutes

Ingredients:
------------
Amount Item Type % or IBU
8.00 lb Pale Malt (2 Row) Bel (3.0 SRM) Grain 42.11 %
8.00 lb Pilsner (2 Row) Bel (2.0 SRM) Grain 42.11 %
1.00 oz Northern Brewer [8.50 %] (90 min) Hops 25.7 IBU
1.00 oz Styrian Goldings [4.10 %] (20 min) Hops 7.0 IBU
0.50 oz Hallertauer Hersbrucker [2.80 %] (20 min)Hops 2.4 IBU
3.00 lb Dark 2 Belgian Candi Syrup (160.0 SRM) Sugar 15.79 %
1 Pkgs Abbey Ale (White Labs #WLP530) Yeast-Ale
1lbs sugar added to beginning of boil, 1lbs added to last 5, 1lbs added in secondary.

Mash Schedule: Decoction Mash, Double
Total Grain Weight: 16.00 lb
----------------------------
Decoction Mash, Double
Step Time Name Description Step Temp
10 min Protein Rest Add 32.00 qt of water at 137.5 F 132.0 F
30 min Saccharification Decoct 8.79 qt of mash and boil it 151.0 F
30 min Saccharification Decoct 4.85 qt of mash and boil it 159.0 F

Same yeast is used in both, and same fermentation schedule is used in both. Chill the wort down to 65f, pitch and let it self rise to about 82-83f and try to hold it there. The yeast will keep the temp there for about 5 days when fermentation is about 80% done (about 1.018) and start to chill down to 65f until you hit terminal gravity at 1.012 which should take 2 days. After this rack off into a secondary (I did kegs for both as I keg conditioned) and chill to 50f for 7 weeks, then carb however you want.