Here is my pumpkin recipe that I brewed for my wife and it is her favorite beer ever. It is based on Dogfish Head's Punkin' Ale. I added pumpkin pie spice at the last 5 minutes of the boil and more pumpkin spice in the secondary to her taste:
American Amber Ale (6 B)
Type: All Grain
Batch Size: 5.00 gal
Boil Size: 6.79 gal
Boil Time: 90 min
End of Boil Vol: 5.98 gal
Final Bottling Vol: 4.60 gal
Fermentation: Ale, Two Stage
10 lbs Pale Malt (2 Row) US (2.0 SRM) Grain 1 74.4 %
1 lbs Biscuit Malt (23.0 SRM) Grain 2 7.4 %
1 lbs Caramel/Crystal Malt - 60L (60.0 SRM) Grain 3 7.4 %
5.0 oz Oats, Flaked (1.0 SRM) Grain 4 2.3 %
2.1 oz Chocolate Malt (350.0 SRM) Grain 5 1.0 %
0.50 oz Hallertau [4.50 %] - First Wort 60.0 min Hop 6 7.3 IBUs
1.00 oz Hallertau [4.50 %] - Boil 60.0 min Hop 7 13.2 IBUs
1 lbs Brown Sugar, Dark [Boil for 60 min](50.0 SRM) Sugar 8 7.4 %
1.00 Items Whirlfloc Tablet (Boil 15.0 mins) Fining 9 -
0.50 oz Hallertau [4.50 %] - Boil 5.0 min Hop 10 1.3 IBUs
2.0 pkg Safale American (DCL/Fermentis #US-05) [50.28 ml] Yeast 11 -
Notes
Additional mash: 60 oz Libby's Pumpkin Pie Filling (unspiced) baked at 375 for 60m.
1.5 Tbs McCormicks Pumpkin Pie Spice (last 5 min of boil).
Good luck!