I have searched and searched but have found no real solid answer so bear with me here.
I am designing a new recipe and looking to sweeten it a bit, the recipe is a Vanilla Espresso Stout and what I want is a sweeter edge to it. In looking around it seems that lactose is the best way to achieve this without a "cloyingly sweet" effect that you can get from Carapils/Dextrin.
I also understand you can pretty much add it whenever though the last bit of the boil seems to be the preferred addition timing so I have set myself on last 20 minutes for that.
The real question is this: I am building this for a 93+/-gal batch (3bbl) and I have seen numbers ranging from .25lbs per 5 gal batch up to 1lb per batch average, that puts me anywhere from 23lbs up to as much as 93lbs in my brew which seems an awful lot....WWHBTD?