How large of a boil can you do? I've got a partial mash recipe for a Dogfish Head 90 min Imperial IPA clone. You would just have to steep 2lbs of malts at about 148 deg.F and then at about 168 deg.F for 10 minutes, you can split them into 2 muslin bags if you wanted then remove after steeping, then carry out the rest of the recipe the way you would an extract. Should spend about 2 weeks in primary, 2 weeks in secondary, then time to carbonate so it should be ready in less than 7 weeks. I do about a 6.25ga. boil to allow for some boil off and get a volume of about 5.5ga in the primary. You'll have to adjust the recipe to your boil size, a smaller boil will take more hops to get up to the 90 IBUs.
Batch Size: 5.5ga
OG: 1.085
FG: 1.016
ABV: ~9%
Color: 11SRM
Yeast: 2 packs of Safale-04 or 05 rehydrated
Grains:
1lb. - Pilsner malt
1lb. - Victory malt
12oz. - Corn sugar
3lbs. - Pilsen light DME
7lbs. - Pilsen light LME
Hops: (90-0 minutes)
1.3oz. - Amarillo
1.3oz. - Simcoe
0.7oz. - Warrior
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1oz. - Amarillo (dry 14/7 days)
1oz. - Simcoe (dry 14/7 days)
Irish Moss
I use pellet hops for the boil, mix the 3.3oz. of hops together for the boil and split into additions, I do about 10 additions over the 90 minute boil. I dry hop with leaf hops half for 14 days (when the racked to the secondary) and add the other half after 7 days. Prime with 4oz. of corn sugar for about 2.3 volumes give or take depending on your temp.