I know several people including myself posted that they would like to know what accommodations would be made for people with allergies. I sent an email to
special.diets@disneyworld.com asking them about this and this is an exerpt from the email I got back:
"There will be several special allergy items available at the Villains' Sinister Soiree: A Wicked Takeover of Cinderella Castle. Some products may have been produced in a plant that contains Tree Nuts, Peanuts, Soy and Wheat. Because this location may have a set menu, the location has requested advance notice for any special dietary request. We have received your request and will forward it to the location. Once you arrive, please alert your server and ask to speak with a Chef or Manager."
So glad to hear that they have already thought ahead to have special desserts available for people with allergies. I would still recommend that anyone with an allergy send an email like I did so that the Special Diet Team can forward the information to the location. They probably need to know how many people will be at each seating with allergies so they can have enough of the desserts for allergy sufferers ready. I just included my name, the name of my daughter and what allergy she suffers from, the reservaton number and the Primary Name on the reservation. Hope this helps everyone.