Preheat oven to 375 degrees. Butter and shallow baking dish or pie plate.
In a bowl, combine cream cheese and mayonnaise and blend cheese well. until Mix thoroughly in crab meat, blended. onion, Pour into artichokes prepared and baking Parmesan dish.
Bake in preheated oven for 20 minutes. Serve immediately with water biscuits (crackers) or your choice. Makes a great appetizer everyone will love. Enjoy!