From the AHA recipe clone section for a similar BGSA:
Ingredients:
10 lb (4.53 kg) Belgian Pilsner malt
1 lb (0.45 kg) Wheat malt
8 oz (0.23 kg) Acidulated malt (more if your water is high pH)
8 oz (0.23 kg) Flaked Oats
8 oz (0.23 kg) Flaked Corn
4-8 oz (113-227 g) Rice Hulls (depending on your system)
2 lb (0.91 kg) Belgian Rock Candy Sugar (if syrup, use 3 lb)
1 oz (28 g) Styrian Golding hops (FWH)
2 oz (56 g) Styrian Golding hops (80 min)
1 oz (28 g) Czech Saaz hops (10 min)
2 oz (56 g) Czech Saaz hops (whirlpool)
Irish Moss (15 min)
Yeast Nutrient (15 min)
Belgian yeast: WLP 570, Wyeast 3787, WLP 510 (a bit less estery), Wyeast 3522, are just a few good ones
Specifications:
Yield: 5.5 gal (20.8 L)
Original Gravity: 1.086
Final Gravity: 1.015
ABV: 9.50%
IBU: 45-50
SRM: 6.5
Directions:
Mash schedule: 131° F (55° C) for 15 minutes; 146-148° F (63-64° C) for 30 minutes; 152° F (67° C) for 40 minutes; 158-162° F (70-72° C) for 15 minutes; mash out to 168° F (76° C( for 30 minutes. Collect runnings, adding first wort hop addition to the kettle. Boil 90 minutes. Cool to 70° F (21° C) as quickly as possible and pitch yeast. If oxygen injection is possible, do it! If not, shake the hell out of the carboy or use another method for aeration. Allow primary fermentation at 66-72° F (19-22° C) for 10 days. Then slow bring temperature down 5° F per day until you reach 33-42° F (1-6° C). Condition at this temperature for 6-8 weeks. Carbonate and enjoy.