I too have brewed Denny's Imperial Vanilla Bourbon Porter, updated slightly for Australian ingredients.
Was definitely a great beer.
A Saison is also a good beer to brew if you want to add spices such as orange peel, corriander and grains of paradise.
Here is the recipe I used for the IVBP.
Imperial Vanilla Bourbon Porter
A ProMash Recipe Report
BJCP Style and Style Guidelines
-------------------------------
15-A Porter, Robust Porter
Min OG: 1.050 Max OG: 1.065
Min IBU: 25 Max IBU: 45
Min Clr: 59 Max Clr: 177 Color in EBC
Recipe Specifics
----------------
Batch Size (L): 23.60 Wort Size (L): 23.60
Total Grain (kg): 8.85
Anticipated OG: 1.087 Plato: 20.97
Anticipated EBC: 60.3
Anticipated IBU: 40.4
Brewhouse Efficiency: 75 %
Wort Boil Time: 90 Minutes
Pre-Boil Amounts
----------------
Evaporation Rate: 10.00 Percent Per Hour
Pre-Boil Wort Size: 27.76 L
Pre-Boil Gravity: 1.074 SG 18.02 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
Additional Utilization Used For Plug Hops: 2 %
Additional Utilization Used For Pellet Hops: 10 %
Grain/Extract/Sugar
% Amount Name Origin Potential EBC
-----------------------------------------------------------------------------
64.9 5.75 kg. JWM Traditional Ale Malt Australia 1.038 7
9.1 0.80 kg. TF Brown Malt UK 1.033 200
14.1 1.25 kg. JWM Light Munich Australia 1.038 20
9.1 0.80 kg. JWM Caramalt Australia 1.036 56
2.8 0.25 kg. JWM Chocolate Malt Australia 1.032 750
Potential represented as SG per pound per gallon.
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
27.00 g. Chinook Pellet 12.20 38.7 60 min.
16.00 g. Goldings - E.K. Pellet 4.50 1.7 10 min.
Extras
Amount Name Type Time
--------------------------------------------------------------------------
1.15 Tsp Irish Moss Fining 15 Min.(boil)
Yeast
-----
White Labs WLP002 English Ale
Mash Schedule
-------------
Mash Type: Single Step
Grain kg: 8.85
Water Qts: 24.50 - Before Additional Infusions
Water L: 23.18 - Before Additional Infusions
L Water Per kg Grain: 2.62 - Before Additional Infusions
Saccharification Rest Temp : 66 Time: 90
Mash-out Rest Temp : 72 Time: 10
Sparge Temp : 78 Time: 60
Total Mash Volume L: 29.10 - Dough-In Infusion Only
All temperature measurements are degrees Celsius.
Notes
-----
After primary, slit open 2 vanilla beans. Scrape the insides, chop the
pods into quarters, add to secondary fermenter, rack beer onto vanilla.
Taste periodically for the correct balance. I left the beer in secondary for 11 days. Rack to bottling bucket and add 10 ml. per pint of Jim Beam
Black Bourbon (or to your taste).
Awards
-----
1st Specialty & Fruit Beers category. NSW State Championships Oct. 2004
Beers,
Doc