I got the original English Nut Brown Recipe here on HBT and modified it with the maple addition. Here goes:
All-Grain – English Nut Brown Ale (from HBT Recipes)
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Batch Size (Gallons): 5.5
OG: 1.054
FG: 1.012
IBU: 22.7
Boiling Time: 60 min.
Color: 16.3 SRM
Primary Fermentation: 7 days
Secondary Fermentation: 14 days
Grains:
9 lb Pale Malt (2-Row) US (2.0 SRM) Grain 76.6 %
1 lb Caramel/Crystal Malt - 60L (60.0 SRM) Grain 8.5 %
1 lb Flaked Oats (1.0 SRM) Grain 8.5 %
0.5 lb Victory Malt (25.0 SRM) Grain 4.3 %
0.25 lb Chocolate Malt (350.0 SRM) Grain 2.1 %
Hops:
1 oz Fuggles [AA 4.5%] (60 min) 14.7 IBU
1 oz East Kent Goldings [AA 5%] (15 min) 8.1 IBU
Yeast:
1 Pkg Nottingham (Danstar #-) Yeast-Ale
Maple syrup:
1 qt. Grade B Dark
Mash Profile:
Single Infusion, Medium Body, Batch Sparge
Mash Grain Weight: 11.75 lb
Sparge Temperature: 168F
Sparge Water: 4.2 gal
Mash In: 14.7 qt of water at 166F, mash @ 154F 60 min
** Based on 70% brewhouse efficiency
I mashed @ 152F. At flame out, added 12 oz. Grade B (dark) maple syrup, ferm 1 week.
Rack to secondary on 20 oz., Grade B (dark) maple syrup, ferm 10 days, package
Wonderful taste, subtle sweet/maple, very pleased with outcome. Only change I might make is less at F/O, more in secondary.
@ SGTSparty: basic ingred. cost was ~ $30-32.. Plus the additional 1 qt. of Grade B dark syrup from a friend @ $15. Gonna be just under a buck a bottle, but worth every penny, IMHO!