Splitting a Batch Help

Im going to be doing a Double Chocolate Stout from AHS soon but I want to try to split the batch and do 4 gallons regular and one gallon a Double Chocolate Peanutbutter Stout.

Now Ive got the peanut butter de-oiled already and I would like to just do one boil and divide it after. Any easy way of doing this without risking infection by just putting the peanutbutter in the one gallon carboy and pouring the wort over it?

If there's no easy way of doing this I may just brew 5 gallons of Double Chocolate Peanutbutter Stout.

I added my PB in a fine mesh bag for the whole boil.

I'd think about doing the PB in secondary. Primary it all together, then split the batch as you describe above.

Kilted Brewer said:

I'd think about doing the PB in secondary. Primary it all together, then split the batch as you describe above.

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Yeah I thought about this. Couldn't the PB cause an infection when I added it to the second carboy not boiling it in the wort?

I wouldn't think so. I guess you could always do a PB "tea" and add that to secondary.