I'm not sure which recipe you used, mine follows, but I wasn't too pleased with mine. It tasted OK but was much darker that the original, was a pain in the butt getting the pumpkin sludge out of the primary and two or three secondary's, ended up with 3 gallons to bottle. If I were ever to do it again, I'd never use canned pumpkin.
Southern Tier Imperial Pumking Ale Clone
4 lbs American Crystal 10L Malt
3 lb Breiss Pilsen DME (60 min)
6 lb Briess Pilsen DME (30 min-late addition)
3 lb 10 oz pumpkin puree (2 1lb,13oz cans), (60 min)
1/2 lb Milk Sugar (Lactose-30 min-late addition)
1 tsp Cinnamon, (1 Stick ground) (10 min)
1/2 tsp Nutmeg, (10 min)
1/2 tsp Ginger, (10 min)
1/2 tsp Cloves, (whole cloves, ground)(10 min)
1/2 tsp Allspice, (whole allspice ground)(10 min)
2 tsp Irish Moss (15 min)
1 tsp Vanilla Bean (1 bean ground)
1 Vanilla Bean (Secondary only if needed)
5 oz Corn Sugar, priming, bottling
WLP002 English Ale Yeast
.5 oz. Magnum (Pellets 13.1% AA), 60 min
1 oz. Sterling (Pellets 6% AA), 10 min
Procedure:
Add Grains to 5.25 gallon of cold water, heat to 175° T1@175° 1745
Maintain 175° temp for 45 minutes T1+45 1830
Rinse grain with quart 175° water, bring to boil, add 3# DME & Hops (watch for boil over!) T2@boil 1910
Boil for 30 minutes and add 6# DME & lactose (watch for boil over!) T2+30 1940
Boil for 15 minutes more and add irish moss T2+45 1955
Boil for 5 minutes more and add hops and spices T2+50 2000
Continue untill all DME dissolved T2+60 2010
Finish boil for 10 minute T2+70 2020
Cool wort from 212° to 70° as quickly as possible T3@212° 2023
Wort at 180° T3@180° 2026
Wort at 140° T3@140° 2033
Wort at 100° T3@100° 2048
Wort at 80° T3@80° 2055
Put airstone in and rack wort into primary fermenter
Take SG reading and record. Pitch yeast and seal up
Notes:
Started with 5.25 gal water, ended boil with 5 gallon and a SG of 1.102 @ 84° nc. The wort was very thick because of pumpkin pulp, not practical to strain off so it went into primary, pulp and all, checked SG several times, starts out a 1.110 but settles in at 1.102 nc.