I think the reccomendation is 2.

The other thing with allergies is they can be fine then one day it will be a reaction. I saw this kid on a medical show who had to be air lifted, he had had peanut butter before, he was about 1.5 years old, he had a reaction and they took him to hospital and he seemed to get better then over night he got worse again.

I personally wouldn't risk it.