General concensus appears to be to wait until 1 year old, but if there is history in your family of nut allergies, it is recommended to wait until 3 yrs old.
It's not something I ever ate until I fell pregnant, then I wanted it

I couldn't eat it during pregnancy or BFing as DHs sister takes a skin rash when in contact with nuts of any form. I was advised to steer clear! As for trying Kirsty with it... My gut instinct tells me she has absolutely no allergies to it as I eat it on my toast every morning, and therefore I guess you could say it's on my hands, and I'm touching her (not that I eat like an animal using my hands

Sounded bad!!)
I would be most likely to try her with some when she manages to eat toast better, right now I have to tear it into small pieces or else she packs the whole piece in her mouth then gags! But yeah, when she learns to bite and eat toast I'll probably try her.
May I just say... I
adore peanut butter