Hi there, Deborah!
The Cinderella Chocolate Slipper is a beautiful way to end a meal.
In addition to Cinderella's Royal Table you can find the Slipper at Disney's Grand Floridian Resort table-service restaurants (Citricos, 1900 Park Fare, Grand Floridian Cafe, Narcoossee’s, Victoria and Albert’s), or during afternoon tea at the Garden View Lounge.
The wonderful Disney Food Blog has a fantastic review and description of this charming treat; you can find it here: http://www.disneyfoodblog.com/2011/06/30/celebrate-with-a-chocolate-cinderella-slipper/
It looks like it would be big enough to share between at least two people.
The Slipper must be 48 hours in advance via Disney’s Cake Hotline at 407-827-2253.
Have a wonderful time!
See you later, celebrator,
-Deborah B.