Doubling a recipe?

[Snotty]

I think I am going to try and make 10 gallons of my Imperial Stout in a couple of weeks and need to figure out how to double up the recipe so I only have to brew once. As with cooking, unless you are making two of the same thing, you never double up on most items.

[_CJ]

Use this..... http://hbd.org/cgi-bin/recipator/recipator

[Jeepindog]

You are correct, for the most part. Going from 5 to 10 does not make much of a difference, except that the hops do not scale linearly, while the grains pretty much do. Now, going from 5 to 5 BARRELS, that'a a big difference. You don't need as much specialty grain in the bigger batches, and less hops. This is because large kettles are engineered to achieve higher hop utilization than our measly homebrewing setups. Steam jacketing, columnar convection, etc. The only question is this: can you mash that much grain??? 10 gals of Imp Stout will net you at least 45-50 lbs of grains. I can bring the laptop and we can scale your recipe on ProMash. It's easier than opening a twist-off...