I have a clone for Duchess which I thoroughly enjoy. No idea how close it is to the real thing as I never had the original Duchess, but still a great recipe:
Butterscotch (FW) 5%
Cake (Yellow) (FW) 2%
Hazelnut (FW) 2%
Vanilla Custard v1 (CAP) 4%
Vanilla Swirl (TPA) 1%
This needs 1 - 2 weeks of steeping. My current ADV
Awesome! Thanks for sharing, gonna mix it up and settle in for a bit of a wait! Seems like it would do the trick to be pretty similar! May mess about with some marshmallow vibes in there to get it closer to reserve