Partigyle Double IPA
Noticing that my beer inventory has diminished more quickly than anticipated I need to get a couple of beers brewed and the easiest way to do this is my new favorite technique, partigyle brewing. Again, that’s brewing multiple beers from the same mash, in my case scaled up to result in 2 5 gallon batches.
To do this I need to come up with a new recipe, or more specifically starting out with an old one. In this case I will be using my Galactica recipe from my clone experiment. This time I’ll be using all Amarillo hops to brew a beer for a homebrew club challenge (single hop challenge), but as the base I will be using the base grain bill from the original clone recipe.
I have found that when formulating the partigyle recipe it is easier to determine what my pre-boil requirements will be and generate a 0 minute boil recipe (using BeerSmith) that meets the right numbers. In this case, my “big” beer has an O.G. of 1.085 at 5.5 gallons. Given my system, with a 1.5 gallon boil-off in 60 minutes, that means I need to have 7 gallons at 1.067. Using the 60/40 split, which means that the first half of the running contain 60% of the potential gravity, that means I need to calculate my recipe to a gravity of 1.050.
Color is a little but trickier since I’m calculating pre-boil volume which means they will change once the boil takes place. My “big” beer is gonna be in the 11 SRM range, so dialing back to accommodate for pre/post boil, and plugging that into the 60/40 calculator (which works for color…mostly) mean my total mash need to dial in about 6.9 SRM. Plugging all this into BeerSmith and I get my base recipe.
24 Pounds 2 Row Pale Malt
1 Pounds Carafoam
2 Pounds Crystal 40
So after all this math, I have one beer that starts out as 7 gallons at 1.065 which boils down to 5.5 gallons at 1.083. But I also have another 7 gallons of wort at 1.033 which will boil down to .042.
Now to just decide what to make my small beer into.
Stay tuned for brew day updates!