I believe it is either Herman's or very close to Herman's. I actually got this from Bill Pierce.This is for 5 gallons . .
8.5 lbs. Pilsner
1.25 lbs. Caramunich II
0.5 lb. Special B
0.5 lb. Flaked Maize
1.5 oz. Carafa Special
1.5 lb. Belgian Dark Candi syrup (added just before flameout)
1.5 lb. White Table Sugar (added just before flameout)
1.25 oz. Styrian Goldings 60 min.
1 oz. Hershbrucker 30 min.
0.38 oz. Hershbrucker 5 min.
2 tsp. Freshly Ground Coriander seed 10 min.
Wyeast 1762, pitched at 68 F and allowed to rise to 73 F as vigorous fermentation begins to level off.
The reason for the additional sugar is an attempt to achieve the high attenuation of Rochefort.
The key is to make your own Belgian Dark Syrup from table sugar with a little creme of tarter which helps “invert” the glucose-fructose bond in the sucrose. It's easy AND a lot cheaper than buying syrup!