Here's my Nut Brown. It's pretty simple and I've brewed it a couple ways with good success. There is a mild nutty aftertaste. Be advised..I don't pay real close attention to keeping within style color standards. It may be a hair darker than most. I think adding a spice might mask or dominate the nutty undertones provided by the grains. The nutty character can be hard to get to come through as it is without the spice. My goal is smooth and clean with a slight nuttiness/bitterness aftertaste. I haven't strayed from Willamette hops on this one so I can't say how other varieties would affect the nuttiness.
For your review:
Hack's Nut Brown:
9 lb Pale Malt
1 lb crystal 40L
0.5 lb Amber Malt
0.5 lb Chocolate Malt
1 oz Williamette 45min
0.5 oz Williamette 10min
0.5 oz Williamette 5 min
1 oz Williamette 1 min
===Alt hops profile===
1.5 oz Willamette at 45 min
0.5 oz Willamette at 5 min
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Wyeast American Ale Yeast
Got about half a keg in the fridge right now...