Sean,
I just put this through ProMash. See what you think of it.
Actually looks so tempting I might even give it a go myself. Efficiency is at 75% YMMV
Warren -
A ProMash Recipe Report
BJCP Style and Style Guidelines
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18-B Belgian Strong Ale, Belgian Dubbel
Min OG: 1.062 Max OG: 1.075
Min IBU: 15 Max IBU: 25
Min Clr: 25 Max Clr: 36 Color in EBC
Recipe Specifics
----------------
Batch Size (L): 23.00 Wort Size (L): 23.00
Total Grain (kg): 6.00
Anticipated OG: 1.065 Plato: 15.98
Anticipated EBC: 62.8
Anticipated IBU: 23.1
Brewhouse Efficiency: 75 %
Wort Boil Time: 90 Minutes
Pre-Boil Amounts
----------------
Evaporation Rate: 15.00 Percent Per Hour
Pre-Boil Wort Size: 29.68 L
Pre-Boil Gravity: 1.051 SG 12.54 Plato
Formulas Used
-------------
Brewhouse Efficiency and Predicted Gravity based on Method #1, Potential Used.
Final Gravity Calculation Based on Points.
Hard Value of Sucrose applied. Value for recipe: 46.2100 ppppg
Yield Type used in Gravity Prediction: Fine Grind Dry Basis.
Color Formula Used: Morey
Hop IBU Formula Used: Rager
Grain/Extract/Sugar
% Amount Name Origin Potential EBC
-----------------------------------------------------------------------------
50.0 3.00 kg. Hoepfner Pilsner malt Germany 1.038 4
33.3 2.00 kg. JWM Dark Munich Australia 1.039 32
1.7 0.10 kg. Weyermann Carafa Special I Germany 1.036 1277
4.2 0.25 kg. Weyermann Caramunich II Germany 1.035 167
2.5 0.15 kg. Weyermann Caraaroma Germany 1.034 470
8.3 0.50 kg. Candi Sugar (amber) Generic 1.046 198
Potential represented as SG per pound per gallon.
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
30.00 g. Styrian Goldings Whole 5.25 20.9 90 min.
20.00 g. Tettnanger Whole 4.50 2.2 10 min.
Yeast
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WYeast 3522 Belgian Ardennes