QCMamma,
Yes, the allergist was okay with Nutella and my son can eat all forms of hazelnut now (as long as they are not contaminated with peanut because he's still allergic to peanuts). He's 12. We have been undergoing food challenges for various tree nuts since June. The pistachio challenge was the hardest because I used actual pistachio nuts and he did not like them! I am using nut butters from now on because they taste better. He loved the Nutella.
I understand your being nervous about the challenge. I was nervous about the first one too, and I did not let my son know because I did not want him to be anxious as well. I pray all goes well for your daughter on Tuesday!
Irene