This was tasty! You can taste the nut flavor and i had no problem with head retention with the associated nut oils. I have never used pecans though. I would do it this way. See note at bottom of recipe
Recipe: Macadamia Nut Brown TYPE: All Grain
Style: Northern English Brown Ale
---RECIPE SPECIFICATIONS-----------------------------------------------
SRM: 14.6 SRM SRM RANGE: 12.0-22.0 SRM
IBU: 20.2 IBUs Tinseth IBU RANGE: 20.0-30.0 IBUs
OG: 1.050 SG OG RANGE: 1.040-1.052 SG
FG: 1.015 SG FG RANGE: 1.008-1.013 SG
BU:GU: 0.403 Calories: 151.6 kcal/12oz Est ABV: 4.6 %
EE%: 75.00 % Batch: 3.00 gal Boil: 4.43 gal BT: 75 Mins
---WATER CHEMISTRY ADDITIONS----------------
Total Grain Weight: 5 lbs 8.1 oz Total Hops: 0.52 oz oz.
---MASH/STEEP PROCESS------MASH PH:5.50 ------
>>>>>>>>>>-ADD WATER CHEMICALS BEFORE GRAINS!!<<<<<<<
Amt Name Type # %/IBU
2 lbs 14.6 oz Pale Malt, Maris Otter (Thomas Fawcett) Grain 1 52.9 %
1 lbs 7.0 oz Amber Malt (30.0 SRM) Grain 2 26.2 %
7.9 oz Carapils (Briess) (1.5 SRM) Grain 3 9.0 %
7.9 oz Oats, Flaked (1.0 SRM) Grain 4 9.0 %
1.8 oz Brown Malt (65.0 SRM) Grain 5 2.0 %
0.9 oz Chocolate Malt (450.0 SRM) Grain 6 1.0 %
Name Description Step Temperat Step Time
Mash In Add 2.06 gal of water at 170.9 F 154.0 F 60 min
---SPARGE PROCESS---
>>>>>>>>>>-RECYCLE FIRST RUNNINGS & VERIFY GRAIN/MLT TEMPS: 65.0 F/68.0 F
>>>>>>>>>>-ADD BOIL CHEMICALS BEFORE FWH
Fly sparge with 3.03 gal water at 168.0 F
---BOIL PROCESS-----------------------------
Est Pre_Boil Gravity: 1.035 SG Est OG: 1.050 SG
Amt Name Type # %/IBU
0.32 oz Horizon [8.50 %] - Boil 75.0 min Hop 7 20.2 IBUs
Amt Name Type # %/IBU
0.20 oz Goldings, East Kent [5.70 %] - Aroma Ste Hop 8 0.0 IBUs
---FERM PROCESS-----------------------------
Primary Start: 09/21/2012 - 4.00 Days at 67.0 F
Secondary Start: 09/25/2012 - 10.00 Days at 67.0 F
Style Carb Range: 2.20-2.70 Vols
Bottling Date: 10/05/2012 with 2.3 Volumes CO2:
---NOTES------------------------------------
Add 1.5 oz of roughly chopped/roasted/unsalted macadamia nuts to beginning of the mash. Baked 350 for 15 min.