This is a work in progress
I soak bits of old bourbon barrel or oak chips and soak in bourbon (Makers Mark!) for a week then add them plus more bourbon to secondary for as long as I can stand not drinking it, at least 1-week to 3-months is my record. I usually use a tertiary transfer for a few days before bottling.
Cloned from Allagash Brewing. Add dark candy sugar rocks in the last 15 minutes of boil.
Experimental.