Wed Sep 24, 2014 7:14 pm
First, I'd raise the amount of malt grains and lower the extract so that you have enough diastatic power to convert the pumpkin.
I'd go with 2 lbs MO and 2 lbs wheat malt there.
I always recommend that once you start building your own extract recipes, you should not use Amber or Dark extract. This is because you are then tied to that manufacturer's proprietary mix. You will never be able to replicate it with either a different manufacturer's extract or your own AG recipe (should you ever go that way). You also can never really tweak the crystal mix they use and you are kind of stuck with their ratios. Steeping your own crystal and using Pale extract makes it easy to tweak and convert in the future.
A reasonably close sub for 6.6 lbs Amber LME is 1/2 lb C60 and 6 lbs Pale DME. However, you already have some C40 in this recipe. I'd actually keep the existing C40 and instead of adding C60 here, I'd add C80 to add a little more of that bittersweet caramel to go with the pumpkin spices.
Cluster hops can be catty. I'd go with Willamette or Fuggles in a pumpkin beer and try to hit around {edit]30-35[/edit] IBUs.
So:
4 lbs canned 100% pumpkin
2 lb Marris Otter Pale malt
2 lb Wheat malt
1/2 lb Crystal 40 malt
1/2 lb Crystal 80 malt
6 lbs light DME
1.5 oz Willamette Hops 6%AA (60 min) - aim for 30-35 IBUs [edit= on second thought, this is a pretty big beer, you probably want 30-35 IBUs to balance all the malt in this recipe]
US-05
Crush the grains and do the mini-mash of the pumpkin and crushed malts
at 152F for about 45 mins or until the iodine test shows negative starch.
The moderately high mash temp will give you a medium bodied mouthfeel.
Ferment cool around 65F for a cleaner profile to let the spices shine through
Prime with 3/4 cup corn sugar to hit around 2.4 volumes of C02.
Feel free to add half the extract in the last 15 mins of the boil .
As far as topping up in the fermenter, make sure you preboil and treat your water to remove
chlorine/chloramine before topping up. (Campden tablets work well for this).
You will avoid nasty chlorophenolic off flavors (Band-Aid/medicinal), a common flaw when
topping up with straight tap water.
My .02-
-B'Dawg
BJCP GM3 Judge & Mead
"Lunch Meat. It's an acquired taste....." -- Mylo